考虑地震行波效应的渡槽动力响应分析

Dynamic Response Analysis of Aqueduct with Seismic Traveling Wave Effect

以南水北调中线漕河渡槽为研究对象,考虑在地震行波效应问题中,采用支座大质量法实现多点地震输入,并与一致输入的结果进行对比。结果表明:地震波多点输入考虑行波效应时,渡槽结构纵向位移峰值可增大数倍;地震效应对横向位移值的影响最为显著,对竖向位移值和应力分量的影响不大;在行波效应影响下,纵向位移和横向位移有增大趋势,竖向位移、第一主应力和第三主应力呈减小趋势。

As the research object to the South-to-North Water Transfer Project of the Caohe Aqueduct,considered earthquake with the traveling wave effect,with support large mass method to realize multi-site earthquake input,it compared with the results from uniform excitation.The results show that,when consider the traveling wave effect,the longitudinal displacement response peak of aqueduct will increase several times,lateral displacement response in the most significant influence,for other displacement and stress components of no significant impact;traveling wave effect to structural response of different influence law,the longitudinal displacement and transverse displacement increase with the trend,vertical displacement,the first principal stress and the third principal stress show a trend of decrease.