高速铁路封闭式声屏障的风压荷载试验研究  

Experimental study on wind pressure load of closed sound barrier for high-speed railway

作　　者：敬海泉 彭天微 何旭辉[1,2] 周继超 张世峰 张海瑜 JING Haiquan;PENG Tianwei;HE Xuhui;ZHOU Jichao;ZHANG Shifeng;ZHANG Haiyu(School of Civil Engineering,Central South University,Changsha 410075,China;National Engineering Laboratory for High Speed Railway Construction,Central South University,Changsha 410075,China;China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中南大学高速铁路建造技术国家工程实验室,湖南长沙410075 [3]中国铁路设计集团有限公司,天津300308

出　　处：《铁道科学与工程学报》2021年第8期1960-1967,共8页Journal of Railway Science and Engineering

基　　金：国家重点研究计划项目(2017YFB1201204);国家自然科学基金资助项目(51925808,U1934209,52078502);中国铁路总公司科研课题(P2018G004);湖南省自然科学基金资助项目(2019JJ50819)。

摘　　要：针对高速铁路封闭式声屏障在列车风与横风作用下的风压荷载问题,采用中南大学自主研发的横风-移动列车风洞试验系统,研究横风和列车风作用下声屏障的风压荷载分布。研究结果表明:圆形断面封闭式声屏障外壁风压系数分布沿环向先减小后增大,与单圆柱的风压分布大致相似,给定风速下最大负风压系数−3.38;单车通过声屏障时脉动风压幅值与车速平方近似成正比,同一截面风压沿环向非均匀分布,近侧的压力峰值高于远侧,最大相差16%;2车交会时,交会区域风压峰值明显增大且极值风压出现在交会截面,其值约为单车通过时极值风压的2倍。By aiming at the wind pressure load of the closed sound barrier of high-speed railway under the action of train wind and cross wind,the crosswind-moving train wind tunnel test system independently developed by Central South University was used to study the wind pressure load distribution of the sound barrier under the action of cross wind and train wind.The research results show that the wind pressure coefficient on the outer wall of the closed sound barrier with circular cross-section decreases first and then rises along the ring direction,which is roughly similar to the wind pressure distribution of a single cylinder.The maximum negative wind pressure coefficient reaches-3.38 at a given wind speed.When a single train passes through the sound barrier,the amplitude of fluctuating wind pressure is approximately proportional to the square of the vehicle speed.The wind pressure on the same section is unevenly distributed along the circular direction.The pressure peak on the near side is higher than that on the far side,with a maximum difference of 16%;When two trains meet,the peak wind pressure in the intersection area increases significantly,and the extreme wind pressure appearsin the intersection section,which is about twice the extreme wind pressure when a single train passes.

关 键 词：封闭式声屏障 横风荷载 列车脉动风荷载 动模型弹射试验 风洞试验 

分 类 号：U238[交通运输工程—道路与铁道工程] U260.17[机械工程—车辆工程]