Wind tunnel tests on the influence of turbulent integral scale on #br#
aerostatic coefficients of typical bridge section
Pei Cheng1 Ma Cunming1,2 Wang Mingzhi1 Yang Shenyun1 Liu Xiaoyu1
1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031，China；2. Key Laboratory for Wind Engineering
of Sichuan Province, Southwest Jiaotong University,Chengdu 610031, China
Abstract：In order to study the influence of turbulent integral scale on the aerostatic coefficients of common bridge sections, force measurement tests were performed on typical bridge sections by simulating turbulence in wind tunnels. It is difficult for the traditional test method of simulating turbulence by means of spires and grilles to simulate the great integral turbulent scale in actual wind field. In this work, the turbulent integral scale of the experimental wind field is effectively increased by using the active control grid, and the wind fields of different turbulent integral scales are generated by controlling the vibration frequency of the active control grid. The aerostatic coefficients of five typical bridge cross-sections, namely, single box girder, twin-box girder, truss girder, edge main girder and side-box girder, were measured under turbulent flow and uniform flow. The aerostatic coefficients of five typical bridge cross-sections under turbulent flow and uniform flow are compared and analyzed. The results showed that under different turbulent integral scales, the resistance coefficient increases with the increase of turbulent integral scale, and it is less than the value under the uniform flow. Additionally, the results also show that to be conservative for design of actual project, the static coefficient shall be determined under the uniform flow. Therefore, the aerostatic force test is suggested to be carried out under the uniform flow.
裴城 马存明 王明志 杨申云 刘晓宇. 紊流积分尺度对典型桥梁断面静力#br#
系数影响规律的风洞试验研究[J]. 土木工程学报, 2020, 53(1): 64-72.
Pei Cheng Ma Cunming Wang Mingzhi Yang Shenyun Liu Xiaoyu. Wind tunnel tests on the influence of turbulent integral scale on #br#
aerostatic coefficients of typical bridge section. 土木工程学报, 2020, 53(1): 64-72.
