LE THAI HOA, Dr.Eng.

 

 

Assistant Professor

Faculty of Engineering Mechanics and Automation

University of Engineering and Technology (UET)

Vietnam National University, Hanoi (VNU)

144 Xuan Thuy Rd., Cau Giay Dist., Hanoi, Vietnam

Phone: (84) 04.3766.4848    / Fax: (84) 04.3754.7460

E-mail: thle@vnu.edu.vn

Institutional URL: www.coltech.vnu.edu.vn

Personal URL: www.coltech.vnu.edu.vn/~thle/

Download My Curriculum Vitae 1/ Long CV

             2/ Short CV

 

 

Current Title 

Global COE Associate Professor  

Wind Engineering Research Center

Tokyo Polytechnic University

1583 Iiyama, Atsugi, Kanagawa 243-0297, Japan

Tel. (81) 046.242.9927, Fax. (81) 046.242.9927

Institutional URL: http://www.wind.arch.t-kougei.ac.jp/system/eng/contents/code/member

E-mail: thle@arch.t-kougei.ac.jp

[On the temporary leave from Vietnam National University at Hanoi]

 

 

Education

 

 

 

2007

Doctor of Engineering in Civil Engineering, Kyoto University, Kyoto Japan

Dissertation: “Unsteady buffeting forces and gust response prediction of structures with Proper Orthogonal Decomposition applications[PDF]

2003

Master of Science (Hons.) in Engineering Mechanics, Vietnam National University, Hanoi Vietnam

Thesis: “Aeroelastic stability analysis of cable-stayed bridges and Flutter control approaches[PDF]

1994

Civil Engineer (Hons.) in Structural/Bridge Engineering, University of Transport and Communications, Hanoi Vietnam

Essay: “Analysis and design of pre-stressed concrete bridges using incremental launching technology

 

 

WORKING EXPERIENCE

 

 

4.2009 -

Now

Global COE Associate Professor, Wind Engineering Research Center,

Tokyo Polytechnic University Japan

http://www.wind.arch.t-kougei.ac.jp/system/eng/ 

1.2009 - 3.2009

Global COE Researcher, Wind Engineering Research Center,

Tokyo Polytechnic  University Japan

12.2007 - 1.2009

Assistant Professor, University of Engineering and Technology, Vietnam National University at Hanoi Vietnam

http://www.coltech.vnu.vn/ 

1.2004 - 9.2007

Research Assistant, Department of Civil and Earth Resources Engineering, Kyoto University Japan

http://www.ce.t.kyoto-u.ac.jp/en/ 

9.2000 - 12.2003

Research Assistant, Graduate Center for Mechanic Studies and Department of Vibration, Vietnam Academy of Science and Technology, Hanoi Vietnam

http://www.imech.ac.vn/ 

1.1995 - 12.2003

Researcher and Research Engineer, Research Institute of Transport Science and Technology, Ministry of Transport, Hanoi Vietnam

http://www.itst.gov.vn/ 

 

AWARDS AND PRIZES

 

2010

Marquis Who’s Who in the World 2011 Edition

2005

The Excellent Paper Award at the 60th Annual Meeting on Civil Engineering by Japan Society for Civil Engineers (JSCE), Japan

2002

The Outstanding Young Award of the Hanoi Capital by the Vietnam Youth Federation

2002

The Special Prize for the Young’s Research and Application by Vietnam Fund for Scientific and Technological Creation (VIFOTEC)

2002

Interviewee in the TV Program: “Outstanding young at research bases in Hanoi” by Hanoi Broadcasting Corp.

1998

The Third Prize in the Scientific Conference for the Young by Institute of Building Science and Technology, Vietnam Ministry of Construction

1997

The Second Prize (without the First One) in the Scientific Conference for the Young by Institute of Building Science and Technology, Vietnam Ministry of Construction

2004

Japanese Government Scholarship Award (Monbukagakusho) for Doctoral Program in Engineering at Kyoto University

2002

Internship Training Program Award by Japan International Cooperation Agency (JICA) at Ibaraki, Osaka

 

 

RESEARCH EXPERIENCE

1.  Bridge engineering, bridge monitoring and testing, bridge and building aerodynamics

·        Analysis and design of pre-stressed concrete bridges

·        Modeling, analysis and design of long-span cable-stayed bridges

·        Analysis and design of pre-stressed concrete bridges by incremental launching method

·        Analysis and design of pre-stressed concrete bridges by cantilever method

·        Analysis and design of curved pre-stressed concrete bridges

·        Design of assembled steel truss girders for provincial roadways

·        Finite element analysis for statics and dynamics of bridges

·        Grillage analysis for bridge decks

·        Wind loading on bridges

·        Earthquake loading on bridges

·        Soil-structure interaction analysis for bridge foundations

·        Thermal stress analysis of boxed bridge girders

·        Static and dynamic testing of bridges

·        Monitoring strategy for cable-stayed bridges in construction stage

·        Inspection strategy for existing bridges (routine, regular and special inspection procedures)

·        Tension force estimation in cables of cable-stayed bridges using impulse excitation method

·        Initial tension force adjustment of cables in construction of cable-stayed bridges

2. Wind-induced vibrations of bridges

·        Aeroelastic stability analysis (Flutter Stability) of bridges in both the frequency and time domains, especially cable-stayed bridges

·        Gust response prediction (Buffeting Response) of bridges and towers in both the frequency and time domains

·        Cable aerodynamics and rain-wind induced vibration of inclined cables

·        Digital simulation of multi-variate turbulence fields using spectral representation methods such as Cholesky decomposition and modal factorization    

3. Wind-resistant design of structures using wind tunnel tests and specifications

·        Forced vibration tests, free vibration tests for bridge girders and prisms

·        Multi-component force measurement of bridge girders and prisms

·        Multi-channel pressure measurement of bridge girders and buildings

·        Wind resistant design of bridges and towers using specifications and codes  such as HSBA, AIJ, Eurocode II  

4. Proper Orthogonal Decomposition (POD) and its applications to wind engineering (in both the time domain and frequency domain)

·        Proper Orthogonal Decomposition and its Proper Transformations in both the time domain and the frequency domain

·        Analysis and synthesis of multi-variate pressure fields using both Covariance and Spectral Proper Orthogonal Decompositions

·        Digital simulation of turbulence fields using Spectral Proper Orthogonal Decomposition

·        Buffeting response analysis of bridges in both the frequency domain and the time domain using Covariance and Spectral Proper Orthogonal Decompositions

·        System identification of ambient and wind-excited structures using Spectral Proper Orthogonal Decomposition

·        Spanwise coherence map, coherence modes of turbulence and pressure using Spectral Proper Orthogonal Decomposition

5. Time-frequency analysis and its applications to wind engineering

·        Analysis and synthesis of wind turbulence, turbulence-induced pressure and forces using both Continuous Wavelet Transform and Discrete Wavelet Transform

·        Development of advanced tools such as wavelet auto spectrum, wavelet cross spectrum, wavelet coherence and wavelet phase difference

·        Cross correlation detection between wind turbulence and pressure, between wind turbulence and forces using wavelet cross spectrum and wavelet coherence

·        Spanwise pressure coherence using wavelet coherence

6. Structural Health Monitoring and assessments of ambient and wind-excited structures

·        Structural Health Monitoring of bridges, low-rise buildings and towers with emphasis on ambient vibration monitoring

·        Vibration tests applied in bridges and buildings such as ambient vibration, free vibration, sine sweep vibration and white noise vibration, base excitations for seismic simulation   

·        Modal parameter estimation (natural frequencies, damping and mode shapes) from ambient vibration data

·        Frequency response function and transfer function identification from input-output measurements 

·        System identification methods from output-only measurements in the frequency domain, the time domain and the time-frequency plane

 

 

 

Professional services

·        Modeling, structural analysis and design of bridges, especially cable-supported bridges using Finite Element Software Packages and Codes

·        Vibration analysis of bridges and buildings

·        Wind resistant design of bridges and buildings using codes and wind tunnel tests

·        Flutter stability analysis of bridges; Buffeting response analysis of bridges and towers; Rain-wind-induced vibration analysis of inclined cables  

·        Full-scale measurement and assessment of bridges and buildings, modal parameter identification from vibration data

·        Finite Element Modeling of bridges and buildings using SAP2000

·        Numerical simulation of fluid-structure interaction using FLUENT and OpenFOAM

·        Scientific and professional programming using MATLAB and C++

 

 

 

Research Interests

·        Bridge engineering; Structural dynamics

·        Wind engineering; Bridge and building aerodynamics

·        Wind resistant design of bridges and buildings; Wind tunnel tests; Codification and specification

·        Full-scale measurement and assessment of ambient and wind-excited structures; Structural Health Monitoring; System identification techniques for input-output and output-only measurements; Modal tests

·        Development and applications of orthogonal decomposition using the Proper Orthogonal Decomposition; non-orthogonal decomposition using the Independent Component Analysis to potential topics in the wind engineering,  structural dynamics and system identification

·        Development and applications of the time-frequency analysis using the Wavelet Transform and the Hilbert-Huang Transform to potential topics in the wind engineering, structural dynamics and system identification

·        Stochastic modeling and simulation of extreme winds and wind-excited structures in both the frequency domain and the time domain

·        Computational Wind Engineering with emphasis on 3-D numerical simulation of prisms and girders using RANS and LES turbulence models

·        Wind energy; Wind effects on wind turbines (Buffeting response; Flutter stability; Structural design and wind turbine siting)

 

 

 

Current topics

1.     Modern system identification methods for structural monitoring and assessment of ambient and wind excited structure

·        Frequency domain-based methods: Peak Picking (PP), Frequency Domain Decomposition (FDD), Enhanced Frequency Domain Decomposition (EFDD)

·        Time domain-based methods: Random Decrement Technique (RDT), Data- and Covariance-driven  Stochastic Subspace Identification (SSI)

·        Time frequency plane-based methods:  Wavelet Transform and Hilbert-Huang Transform

·        Uses of Proper Orthogonal Decomposition (POD) and Independent Component Analysis (ICA) for modal analysis and system identification

·        Input-output system identification methods: FRF estimator and Least-Squares Complex Method (LSCM)

·        Natural frequency and damping processing techniques

2.       Stiffness evaluation of operational and experimental low-rise residential buildings using vibration tests

·        Stiffness evaluation and contribution of structural and non-structural components on three-storey operational and one-storey experimental residential buildings using vibration tests

·        Modal parameter identification (natural frequencies and damping ratios) based on the most common vibration tests such as ambient vibration tests, free decay vibration tests, sine sweep vibration tests, white noise excitations and base seismic excitation tests

·        Influence of vibration tests, structural components and excitation amplitudes on dynamic properties identification

·        Finite Element Modeling of structural and non-structural components; model updating of finite element models using sensitivity analysis based on vibration data

3.       New tools and application based on Proper Orthogonal Decomposition, Non-orthogonal Decomposition, Empirical Mode Decomposition and Time-Frequency Analysis methods for wind effects on structures

·        Investigation of spanwise pressure coherence on prisms using new tools based on Spectral Proper Orthogonal Decomposition and wavelet transform

·        Prediction of unsteady buffeting response of bridges using Covariance Proper Orthogonal Decomposition

·        Analysis and synthesis of multi-variate pressure fields using Hilbert-Huang transform, Independent Component Analysis and Empirical Mode Decomposition

·        Estimation of multi-variate admittance functions and aerodynamic weighting functions of prisms and girders using system identification techniques in the frequency domain and the time domain

·        Cross correlation detection between wind turbulence and turbulence-induced forces in the time-frequency plane using wavelet transform-based tools   

4.       Computational simulation of the aerodynamic behavior of fundamental prisms and bridge girders

·        2-D and 3-D flow investigation on fundamental prisms B/D=1, B/D=5 using RANS, LES and hybrid DES turbulence models with focus on spanwise coherence structure and convection flow

·        Investigating on influence of spanwise length L/B and boundary condition on spanwise in comparison with experiments

 

 

 

Teaching Activities (at Vietnam National University)

·        Linear Algebra I, II

·        EMA3014 Orbital Mechanics

·        EMA6042 Structural Engineering

·        EMA6063 Aerodynamics of Structures

 

 

Teaching INTERESTS

 

·        Wind engineering; Bridge and Building Aerodynamics; Wind-induced Responses of Bridges and Buildings 

·        Structural Dynamics; Vibration Analysis

·        System Identification and Modal Analysis; Structural Health Monitoring

·        Design, Modeling and Analysis of Structures; Finite Element Analysis; Bridge Engineering; Concrete and pre-stressed Structures 

·        Engineering Mathematics; Linear Algebra 

·        Wind Tunnel Tests; Wind Resistant Design for Civil Structures; Operational and Experimental Vibration Tests

 

 

Book

Le Thai Hoa (2011), Bridge Aerodynamics and Response, Vietnam National University Publisher

(in preparation)

 

 

Professional Engineer

 

Accredited Professional Engineer in Bridge/ Structural Engineering at Vietnam

 

 

Professional Affiliation

 

International Association for Wind Engineering (IAWE)

Japan Society for Civil Engineers (JSCE)

Vietnam Bridge and Road Association (VIBRA)

Vietnam Association for Mechanics (VAME)

 

SCIENTIFIC ACTIVITIES

·        Reviewer for Wind and Structures, An International Journal

·        Reviewer for Journal of Wind Engineering and Industrial Aerodynamics - CWE2010: Special Issue

·        Chair, the Joint Scientific Workshop on Wind Engineering, Tokyo Polytechnic University – China Aerodynamic Research Center, May, 2010 

·        Chair, the 2nd International Symposium on Universal Equivalent Static Wind Load, Tokyo Polytechnic University, November 29-30, 2010

·        Co-chair, Technical Session:”Wind Resistant Design”, 5th International Symposium on Wind Effects on Buildings and Urban Environment (ISWE5), Sunroute Plaza Tokyo, March 7-8, 2011

·        Open Lecture “New Insights of Proper Orthogonal Decomposition in Wind Engineering Applications”, Tokyo Polytechnic University, January 1, 2009

·        Major Contributor, “Preparedness for Wind-Related Hazards in Haiti”, Guidelines for Haitians prepared under joint collaboration between Int’l Strategy for Disaster Reduction, Tokyo Polytechnic University, Int’l Association for Wind Engineering and Int’l Group for Wind-Related Disaster Risk Reduction, 2010

 

 

Publications

 

2011

 

Le, T.H., Tamura, Y. (2011), “Frequency- vs. time-domain Flutter analysis methods for full-scale bridges”, The 1st International Symposium of Flutter Control and Applications, 15-16th September, Tokyo, Japan   

Le, T.H., Tamura, Y., Matsumoto, M. (2011), “Multiple admittance function estimation on prisms using system identification techniques”, Proceedings of the 13th International Conference on Wind Engineering (ICWE13), 10-15th July, Amsterdam, Netherlands  

Le, T.H., Tamura, Y., Matsumoto, M. (2011), “Temporal-spectral correlation of wind fluctuations and buffeting forces using time-frequency analysis methods”, Proceedings of the 13th International Conference on Wind Engineering (ICWE13), 10-15th July, Amsterdam, Netherlands  

 

2010

Le, T.H., Tamura, Y., Matsumoto, M. (2010), “Spanwise pressure coherence on prisms using proper orthogonal decomposition and wavelet transform based tools”, J. Wind Engineering and Industrial Aerodynamics (doi:10.1016/j.jweia.2011.01.008) [PDF]

Le, T.H., Tamura, Y., Yoshida, A. (2010), “High-order and close modal parameter estimation of ambient data using wavelet transform”, Engineering Mechanics, ASCE (submission soon)

Le, T.H., Nakata, S., Yoshida, A., Kiriyama, S., Naito, S., Tamura, Y. (2010), “Influence of structural components on dynamic properties of experimental low-rise residential building using vibration tests”, Engineering Structures (in submission)

Le, T.H., Tamura, Y., Yoshida, A. (2010), “Ambient modal identification via wavelet transform”, Engineering Structures (under preparation)

Le, T.H., Matsumoto, M., Shirato, H., Tamura, Y. (2010), “Wind simulation and buffeting response prediction for structure based on covariance and spectral proper orthogonal decompositions”, Wind & Structures (in submission)

Le, T.H., Matsumoto, M., Shirato, H., Tamura, Y. (2010), “Understanding of unsteady pressure fields on prisms based on covariance and spectral proper orthogonal decompositions”, J. Wind Engineering and Industrial Aerodynamics (in submission)

Le, T.H., Tamura, Y., Yoshida, A. (2010), “Modal parameter estimation from ambient data using time-frequency analysis”, Int’l Conference of Noise and Vibration (ISMA2010), Sep.20-22, Leuven Belgium [PDF]

Le, T.H., Nakata, S., Yoshida, A., Kiriyama, S., Naito, S., Tamura, Y. (2010), “Influence of vibration methods, structural components and excitation amplitudes on modal parameters of low-rise buildings”, Proceedings of the 5th World Conference on Structural Control and Monitoring (5WCSVM), Jul. 12-14, Tokyo Japan [PDF]

Le, T.H., Tamura, Y., Yoshida, A., Nguyen, D.A. (2010), “Frequency domain versus time domain modal identification for ambient excited structures”, Proceedings of the Int’l Conference on Engineering Mechanics (ICEMA2010),Jul. 1-2, Hanoi, Vietnam [PDF]

Le, T.H., Tamura, Y., Yoshida, A., Nguyen, D.A. (2010), “Output-only system identification using wavelet transform”, Proceedings of the Int’l Conference on Engineering Mechanics (ICEMA2010), Jul. 1-2, Hanoi, Vietnam [PDF]

Le, T.H., Tamura, Y., Matsumoto, M. (2010), “Spanwise pressure coherence on prisms based on spectral POD and wavelet transform tools”, Proceedings of the 5th Int’l Symposium on Computational Wind Engineering(CWE2010), May 23-27, North Carolina, USA [PDF]

Nakata, S., Kiriyama, S., Naito, S., Yoshida, A., Le, T.H., Tamura, Y. (2010), “Change of dynamic properties of low-rise houses with its structural components - Part1: Outline of experiment”, Proceedings of Annual Meeting Architecture Institute of Japan 

Yoshida, A., Nakata, S., Le, T.H., Kiriyama, S., Naito, S., Tamura, Y. (2010), “Change of dynamic properties of low-rise house with its structural components - Part 2: Experimental results”, Proceedings of Annual Meeting Architecture Institute of Japan

 Le, T.H., Tamura, Y., Matsumoto, M. (2010), “Multiple admittance function estimation on prisms using system identification techniques”, 4-page Extended Abstract, International Conference on Wind Engineering (ICWE13), July 2011, Amsterdam, Netherlands  

Le, T.H., Tamura, Y., Matsumoto, M. (2010), “Temporal-spectral correlation of wind fluctuations and buffeting forces using time-frequency analysis methods”, 4-page Extended Abstract, International Conference on Wind Engineering (ICWE13), July 2011, Amsterdam, Netherlands  

 

2009

Le, T.H., Matsumoto, M., Shirato, H. (2009), “Spanwise coherent structures of wind turbulence and induced pressure on rectangular cylinders”, Wind & Structures, Vol. 12, No. 5, 441-455 [PDF]

Le, T.H. (2009), “Proper Orthogonal Decomposition and recent advanced topics in wind engineering”, Journal of Science, VNU, Vol.25, No.1, 21-38 [PDF]

Le, T.H. (2009), “Use of continuous wavelet transform-based tools for studying turbulence, aerodynamic forces and coherence”, Journal of Science, VNU, Vol.25, No.4, 74-88 [PDF]

Le, T.H., Tamura, Y. (2009), “Modal identification of ambient vibration structure using frequency domain decomposition and wavelet transform”, Proceedings of the 7th Asia-Pacific Conference on Wind Engineering (APCWEVII), Taipei Taiwan [PDF]

 

2008

Le, T.H., Tamura, Y. (2008), “Analysis and identification of multi-variate random pressure fields using Covariance and Spectral Proper Orthogonal Decomposition”, Journal of Science, VNU, Vol.24, No.4, 209-222 [PDF]

Le, T.H., Nguyen, D.A. (2008), “Temporal-spectral coherent structures of turbulence and pressure using Fourier and wavelet transforms”, Asian Journal of Science and Technology for Development, Vol. 2, pp. 122-132 [PDF]

Le, T.H. (2008), “Flutter instability of cable-stayed bridges”, National Scientific Seminar on Vibration of Cable-stayed Bridges, Hanoi November 24 [PDF]

Le, T.H. (2008), “New approach on buffeting response prediction of cable-stayed bridges”, National Scientific Seminar on Vibration of Cable-stayed Bridges, Hanoi November 24 [PDF]

Truong, V.H., Le. T.H., Nguyen, P.L (2008), “Analytical model for rain-wind-induced vibration of inclined cables”, Proceedings of the National Conference on Fluid Mechanics, PhanThiet, May 17-18 [PDF]

 

2007

Le, T.H., Nguyen, D.A. (2007), “Spectral proper transformation and application to gust response of structures”, Journal of Mechanics, VAST, Vol. 29 (1), pp. 25-36 [PDF]

Le, T.H., Nguyen, D.A. (2007), “Orthogonal-based wavelet analysis of wind turbulence and correlation between turbulence and forces”, Journal of Mechanics, VAST, Vol. 29 (2), pp. 73-82 [PDF]

Le, T.H., Nguyen, D.A. (2007), “Wavelet transforms with some applications to wind turbulence and cross correlation detection”, Wind & Structures, An Int’l Journal [PDF]

Matsumoto, M., Shirato, H., Le, T.H. (2007), “Time and frequency domain gust response of bridges using proper orthogonal decomposition”, Proc. of the 12th Int’l Conference on Wind Engineering (ICWE12), pp.2271-2278, Jul.1-6, Cairns, Australia [PDF]

 Le, T.H., Matsumoto, M., Shirato, H. (2007), “Analysis and identification of random pressure field on rectangular cylinders using covariance and spectral proper transformation”, The 62th JSCE Annual Meeting on Civil Engineering, CD, Sep. 12- 14, Hiroshima Japan

Le, T.H., Nguyen, D.A. (2007), “Time versus frequency domain gust response of bridges using Dual Modal Transformation”, Proc. of the 8th National Conference on Mechanics, 160-169, Dec. 6-8, Hanoi Vietnam

Le, T.H. (2007), “Proper orthogonal decomposition-based identification and order-reduced model of random pressure field”, Proc. of the 8th National Conference on Mechanics, pp. 150-159, Dec. 6-8, Hanoi Vietnam

Le, T.H., Nguyen, D.A. (2007), “Studying on wind turbulence and cross correlation using time-frequency analysis”, Proc. of the 8th National Conference on Mechanics, pp. 170-179, Dec. 6-8, Hanoi Vietnam

 

2006

Le, T.H., Nguyen, D.A. (2006), “Digital simulation of turbulence field and gust response analysis of line-like structures based on proper orthogonal decomposition”, Proc. of the Int’l Conference on Non-linear Analysis and Engineering Mechanics Today (NA-EMT2006), pp. 254-264, Dec. 12-14, Hochiminh City, Vietnam [PDF]

Matsumoto, M; Shirato, H; Le, T.H. (2006), “Gust response of bridges based on spectral proper transformation”, Proc. of 19th KKCNN Int’l Symposium on Civil Engineering, pp. 489-492, Dec. 10-12, Kyoto, Japan

Matsumoto, M., Shirato, H, Le, T.H., Yamane K., Furukawa, T., Sumikura, Y. (2006), “Temporal-spectral structure of wind and pressure coherences”, The 19th KKCNN Int’l Symposium on Civil Engineering, pp.378-381, Dec.10- 1 2,Kyoto, Japan [PDF]

Matsumoto, M., Shirato, H, Yamane, K., Le, T.H., Furukawa, T., Sumikura, Y., (2006), “Influence of oncoming turbulent flow upon spatial characteristics of gust forces on rectangular cylinder”, Proc. of ]9th KKCNN Int’l Symposium on Civil Engineering, pp. 341-344, Dec. 10-12, Kyoto, Japan

Le, T.H. (2006), “Aerodynamics, stability and response prediction of bridges due to turbulent atmospheric flow”, Proc. of National Conference on Aero-Fluid Mechanics, 10p., Jul. 20-21, VungTau, Vietnam [PDF]

Le, T.H., Nguyen, D.A. (2006), “Multi-variate turbulence process decoupling and gust response prediction using spectral proper transformation”, The 8th National Conference on Solid Mechanics, pp. 343-353, Aug. 25-26, Thai Nguyen, Vietnam

Le, T.H. (2006), “Correlation detection of turbulence and turbulent-induced forces using continuous and discrete wavelet transforms”, Proc. of the 3rd Vietnam Conference on Mechatronics (VCM2006), pp.187-196, Oct. 11-12, Hanoi, Vietnam [PDF]

Le, T.H., Matsumoto, M., Shirato, H. (2006), “Proper orthogonal decomposition-based turbulent loading modes and gust response of structures”, The Vietnamese-Japanese Student Scientific Exchange Meeting, CD, Nov. 4-5, Kobe, Japan

Le, T.H., Matsumoto, M., Shirato, H. (2006), “From Fourier transform to wavelet transform and applications to wind engineering”, The Vietnamese-Japanese Student Scientific Exchange Meeting, Nov. 4-5, CD, Kobe, Japan

Le, T.H., Nguyen, D.A. (2006), Bridge aeroelastic analysis in the frequency domain (no submission) [PDF]

 

2005

Le, T.H., Matsumoto, M., Shirato, H., Mizuno, T., Yamane, K., Furukawa, T., (2005), “Spatial distribution characteristics of surface pressure on 2D rectangular section in 3D fluctuating flow”, The 60th JSCE Annual Meeting on Civil Engineering, CD, Sept. 9-11, Wasada, Japan

Matsumoto, M., Shirato, H.; Le, T.H., Mizuno, T., Furukawa, T. (2005), “Spanwise coherence and distribution characteristics of surface pressure on 2D rectangular cross section in 3D fluctuating flow”, Proc. of the ]8th KKCNN Int’l Symposium on Civil Engineering, pp. 413-418, Dec. 19-21, Caoshung, Taiwan

Matsumoto, M., Shirato, H., Mizuno, T., Furukawa, T., Le, T.H. (2005), “Unsteady surface pressure due to 3-D vertical gust during harmonic body motion”, Proc. of the 18th KKCNN Int’l Symposium on Civil Engineering, pp. 203-208, Dec. 19-21, Caoshung, Taiwan

 

2004

Le, T.H. (2004), “Experimental determination of aerodynamic coefficients of bridge sections in wind tunnel tests”, Journal of Bridges and Highways, No.10

Le, T.H., Dang, G.N., Vu, M.L. (2004), “Characteristics of aeroelastic stability analysis of cable-stayed bridges in erection stages”, Journal of Bridges and Highways. No. 11

Le, T.H. (2004), “Aerodynamic stability analysis of cable-stayed bridges”, Journal of Bridges and Highways, No.12

Le, T. H., Nguyen, T. T. (2004), “Basic configurations and parameters of wind tunnel laboratory for model tests of buildings and bridges”, Proceedings of National Symposium of Highways and Bridge Engineering, QuangNinh Vietnam, July 5-6

Le, T.H., Pham,V.H, Vu, M.L. (2004), “Tension force estimation of stayed cables by forced excitation method”, Proceedings of National Symposium of Highways and Bridge Engineering, QuangNinh Vietnam, July 5-6

Le, T.H., Pham,V.H, Vu, M.L. (2004), “Tension force estimation of stayed cables by forced excitation method”, Proceedings of National Symposium of Highways and Bridge Engineering, QuangNinh Vietnam, July 5-6

Le, T.H., Nguyen, D.A., Vu, M.Lang (2004), “Aeroelastic stability of cable-stayed bridges in lamilar flow”, Proceedings of Annual Symposium of Institute for Transport Science and Technology, May 2004

Le, T.H., Nguyen,D. A. (2004), “Some approaches for flutter control of cable-stayed bridges”, Proceedings of Annual Symposium of Institute for Transport Science and Technology, May 2004

Pham, V. H. Le, T.H., Vu, M. L. (2004), “Estimation of static tesion forces of stayed cabls thanks to vibration method”, Proceedings of Annual Symposium of Institute for Transport Science and Technology, May 2004

Le, T.H., Pham, X. T., Bui, X. H. (2004), “Physical model fabrication and aerodynamic coefficient measurement of bridge cross sections in wind tunnel”, Proceedings of Annual Symposium of Institute for Transport Science and Technology, May 2004

Dang, G.N., Le, T.H., Vu, M.L. (2004), “Some characteristics of aerodynamic stability analysis of cable-stayed bridges in erection stage”, Proceedings of Annual Symposium of Institute for Transport Science and Technology, May 2004

2003

Le, T.H., Nguyen, D.A., Vu, M.L. (2003), “Aerodynamic stability analysis by mode‑by-mode and multi-mode methods for cable-stayed bridges: I. Theory”, Proceedings of Annual Symposium of Research Institute for Transportation Science and Technology, Dec. 2003

Le, T.H., Nguyen, D.A., Vu, M.L. (2003), “Aerodynamic stability analysis by mode‑by-mode and multi-mode methods for cable-stayed bridges: II. Application”, Proceedings of Annual Symposium of Research Institute for Transportation Science and Technology, Apr.2003

Le, T.H., Vu, M.L.(2003), “Some orientations toward buiding up wind-resistant design and analysis guidelines in Vietnam”, Proceedings of Annual Symposium of Research Institute for Transportation Science and Technology, April 2003

 

2001

Vu, M.L., Le, T.H. (2001), “Effects of aerodynamic phenomena on cable-stayed bridges”, Proceedings of the 45th Anniversary ITST’s Scientific and Technological Symposium, December 2001

 

1997-2000

Le, T.H., Vu, M.L. (2000), “Determining initial cable-forces in sectional force adjustment for cable-stayed bridges using optimization method”, Journal of Transport Science and Technology, No.3&4

Le, T.H., Nguyen, .D.L. (2000), “Thermal stress analysis in continuous box-section girder bridges”. Journal of Transport Science and Technology, No.3&4

Vu, M.L., Le, T.H., Pham, X.K. (2000), “Analysis of sectional force adjustment for cable-stayed bridges”. Proceedings of the 6th National Conference for Solid Mechanics, 11/1999

Vu, M.L., Le, T.H., Pham, X.K. (1999), “Three-dimensional analysis of Sonla cable-stayed bridge subjected to earthquake loadings”, Journal of Transport Science and Technology, No.4

Le, T.H., Bui, X.H., Vu, .S.K. (1998), “Investigation on 2D and 3D curved girder structures in intersections and flyovers”, Journal of Transport Science and Technology, No.3

Pham, V.H., Le, T.H. (1998), “Finite element modeling for cable-stayed bridge analysis”. Journal of Transport Science and Technology, No.1

Lam, H.D., Le, T.H., Do, H.T. (1998), “Building up prototype designs of steel truss structures for provincial road routes of Vietnam”, Journal for Bridges and Highways, No.2

Lam, H.D., Le, T.H. (1997), “Investigation on sectional forces and displacements in cable-stayed bridges subjected to dead and live loads”, Journal of Transport Science and Technology, No.1

 

 

RESEARCH PROJECTS

 

1.      Stiffness evaluation and modal parameter estimation of low-rise full-scale and experimental buildings using different vibration tests: ambient vibration test, free vibration test, sine sweep test, white noise test, earthquake simulation tests. Tokyo Polytechnic University, Japan in collaboration with Central Research Laboratory, Asahi Kasei Homes Corp., Japan. Investigators: Tamura, Y., Yoshida, A., Le, T.H. (2009 to now)

2.     Modern modal parameter estimation of ambient excited structures and new tools of proper orthogonal decomposition and time-frequency analysis. Tokyo Polytechnic University Japan. Investigators: Le, T.H., Tamura, Y. (2009 to now)

3.     Experimental investigation on aerodynamic behaviors of fundamental sections and bridge girders. Laboratory of Bridge and Wind Engineering, Kyoto University. Investigators: Masaru Matsumoto et al. (2004 - 2007).  

4.     Tension estimation of cable stays in cable-stayed bridges using vibration method. Research Institute of Transport Science and Technology Vietnam. Investigators: Le, T.H. et al. (2003 - 2004).  

5.     Aeroelastic stability of cable-stayed bridges in erection and service stages. Research Institute of Transport Science and Technology Vietnam. Investigators: Le, T.H. et al. (2003 - 2004).  

6.     Aerodynamic parameter measurements of bridge girders in wind tunnel. Research Institute of Transport Science and Technology Vietnam. Investigators: Le, T.H. et al. (2002 - 2003)

7.     Seismic resistant design of long-span bridges. Research Institute of Transport Science and Technology Vietnam. Investigators: Le, T.H. et al.  (2002 - 2003)

8.     Technical diagnosis of existing bridges using forced vibration testing. Research Institute of Transport Science and Technology Vietnam. Investigators: Pham Xuan Khang, Vu Manh Lang, Le, T.H. (2001 - 2003)

9.     Aerodynamic effects on long-span bridges. Research Institute of Transport Science and Technology Vietnam. Investigators: Le, T.H. et al. (2001 - 2002)

10. Flutter stability analysis of cable-stayed bridges. Research Institute of Transport Science and Technology Vietnam. Investigators: Le, T.H. et al. (2001 - 2002)

11.   Analysis and construction technology of prestressed concrete curved flyovers. Research Institute of Transport Science and Technology Vietnam. Investigators: Vu Song Kim and Le, T.H. (2000 - 2002)

12. Tension force adjustment analysis of cable stays in erection of cable-stayed bridges. Research Institute of Transport Science and Technology Vietnam. Investigators: Vu Manh Lang and Le, T.H. (1996 - 1998)

13.  Influence of geometry, shape, boundary conditions on sectional forces and deformation of cable-stayed bridges. Research Institute of Transport Science and Technology Vietnam. Investigators: Lam Huu Dac and Le, T.H. (1994 - 1996)

 

 

THESIS ADVISOR

 

1.         Truong Viet Hung (2008), Vibrational analysis of inclined cables subjected to wind and rain, Master Program in Civil Engineering, Hanoi University of Civil Engineering 

 

 

SELECTED PRESENTATIONS

 

    2011

Le et al. 2011, Multiple admittance function estimation using system identification techniques [PDF]

Le et al. 2011, Temporal-spectral correlation of wind fluctuation and buffeting forces using time-frequency analysis methods [PDF]

Le 2011, 3-D FE modeling of experimental low-rise building under erection stages [PDF]

 

2010

Le 2010, Estimating multi-variate admittance functions using system identification techniques in the frequency and time domains [PDF] 

Le 2010, Modal parameter estimation of ambient excited structures using time-frequency analysis based methods [PDF]

Le et al. 2010, Influence of vibration tests, structural components and excitation amplitudes on modal parameters of low-rise building [PDF]

Le et al. 2010, Frequency domain versus time domain modal identification for ambient excited structures [PDF]

Le et al. 2010, Output-only system identification using wavelet transform [PDF]

Le et al. 2010, Spanwise pressure coherence on prisms based on wavelet transform and spectral POD tools [PDF]

Le 2010, Modal parameter estimation of low-rise building using sine sweep vibration data [PDF]

    

2009

Le et al. 2009, Modal identification of ambient vibration structure using frequency domain decomposition and wavelet transform [PDF]

Le 2009, Some investigation of modal identification methods of ambient vibration structures [PART1][PART2]

Le et al. 2009, Building 3D Finite Element Analysis modeling of low-rise buildings: Part 1 [PDF]

Le et al. 2009, Building 3D Finite Element Analysis modeling of low-rise buildings: Part 2 [PDF]

Le 2009, POD and new insights for wind engineering, Open Seminar at Tokyo Polytechnic University Japan [PART1][PART2]

 

Others

 

Le 2004, Flutter stability analysis of cable-stayed bridges [PDF]

 

Le 2004, Buffeting response prediction of cable-stayed bridges [PDF]

Le 2004, Aerodynamics, stability and response of long-span bridges in turbulent flow [PDF]

 

 

SELECTED NOTES

 

Le 2004, Stationary random process and digital signal processing [PDF]

Le 2004, Spectral based simulation of multi-variate turbulence fields [PDF]

Le 2004, Flutter stability analysis (Aeroelastic analysis): Theory and Example [PDF] 

Le 2004, Frequency domain numerical buffeting response prediction: I. Theory [PDF]

Le 2004, Frequency domain numerical buffeting response prediction: II. Example [PDF]

Le 2005, Time domain numerical buffeting response prediction: I. Theory [PDF]

Le 2005, Reviews on bluff body flows around prisms and girders [PDF]

Le 2005, Wavelet transform and analysis of random fields [PDF]

Polikar 2001, Engineer’s ultimate guide to wavelet analysis [PDF]

http://users.rowan.edu/~polikar/wavelets/wttutorial.html

 

 

 

Updated by June 1, 2011

Tokyo Japan