Wind Tunnel Test Study on Lattice-Type High-Bracket of Bridge in Typhoon Area
Aerodynamic test and particle image velocimetry test become the key methods in studying the stability of bridge lattice-type high-bracket against typhoon.The wind tunnel force measurement test is used to obtain the data of the three-part coefficient of the static force of the lattice-type high-bracket under different conditions.The PIV technique is used to study the law of lattice-type high-bracket affected by wind direction,and the lattice-type high-bracket model under horizontal and vertical plane flow field is visualized and analyzed.The results show that the effects of static wind loads on resistance,lift and torsion need to be considered comprehensively in the wind resistance calculation.The vortex strength and turbulent kinetic energy at the vortex center of the six-legged lattice high-bracket model are smaller than those of the four-legged lattice-type high-bracket model.There are interactions between the bracket members,and solutions need to be proposed for the effects between the members under wind loads,and the influence of the spatial three-dimensional characteristics of the lattice-type high-bracket on the calculation results needs to be taken into account in the numerical simulation.This paper investigates the stability characteristics of lattice-type high-bracket against typhoons,which provides an important reference for improving the safety of bridge construction.
typhoon arealattice-type high-bracketwind tunnel force testparticle image velocimetry
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