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Aerodynamic Parameter Research and Wind-Induced Response Analysis for Railway Cable-Stayed Bridge

Author: HuangHaiTao
Tutor: LiaoHaiLi
School: Southwest Jiaotong University
Course: Bridge and Tunnel Engineering
Keywords: Steel truss Wind tunnel test Aerodynamic parameters Wind-induced response
CLC: U448.27
Type: Master's thesis
Year: 2011
Downloads: 17
Quote: 0
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Abstract


The bridge deck section aerodynamic parameters characterize the section form suffered wind load corresponding important parameters of the relationship is the basis of wind-induced response analysis of bridge structures . Accurately identify the bridge section aerodynamic parameters , to study the impact factors the bridge wind induced response accurate analysis is of great significance . In this paper, a large cross railway cable-stayed bridge engineering background , on the the truss main aerodynamic parameters of the beam cross-section experimental research , and through the combination of theoretical analysis and wind tunnel tests , its wind-induced response analysis . The main contents of this paper are: (1) suffered wind loads on the bridge structure type , summarize the practical methods of measurement of the wind tunnel laboratory in the segment model subject to static wind buffeting force . ( 2 ) the use of the main beam rigidity segment model , test the main beam in different wind angles of attack static aerodynamic coefficients in the uniform flow conditions , the use of one-third of force balance , to study the impact of their train layout form . (3) the use of the main beam rigid lightweight segment model , using spiers interference to stream to produce a turbulent flow field , the use of dynamic balance force measurement technology , the use of self- power spectrum method to identify the main beam of the aerodynamic admittance function , research and analysis of the wind speed its angle of attack , the train layout form factors given by numerical fitting aerodynamic admittance function expression can be used in the actual buffeting load calculation . ( 4 ) the establishment of a full finite element model of the bridge , using measured static aerodynamic coefficients for static analysis of cable-stayed bridge ; aerodynamic admittance function of the application identification , frequency domain analysis of cable-stayed bridge buffeting response analysis . The calculated results with full-bridge aeroelastic model test comparison , thus proving the accuracy and applicability of this article aerodynamic parameter identification method .

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CLC: > Transportation > Road transport > Bridges and Culverts > All kinds of bridges > Bridge: Structure > Cable-stayed bridge
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