考虑土体各向异性的在役钢筋混凝土渡槽结构动力分析  

Dynamic analysis of reinforced concrete aqueduct structure in service considering soil anisotropy

作　　者：常佳 祝彦知[1,2] 纠永志[1,2] CHANG Jia;ZHU Yanzhi;JIU Yongzhi(School of Civil Engineering and Architecture,Zhongyuan University o￡Technology,Zhengzhou 450007,China;Architectural Design and Research Institute,Zhongyuan University of Technology,Zhengzhou 450007,China)

机构地区：[1]中原工学院建筑工程学院,河南郑州450007 [2]中原工学院建筑设计研究院,河南郑州450007

出　　处：《中原工学院学报》2020年第1期23-28,共6页Journal of Zhongyuan University of Technology

基　　金：河南省水利科技攻关计划项目(GG201764).

摘　　要：为了更加合理地分析地震荷载下土体对渡槽结构动力响应的影响,基于莫尔-库伦准则、TI介质双渐近-多向透射边界原理以及Newmark隐式数值积分法,建立了可考虑横观各向同性土层与TI介质双渐近-多向透射边界的渡槽动力计算模型。根据上述动力计算模型编写了相应的计算程序,并利用计算程序对不同工况下的渡槽模型进行了计算与分析。结果表明:在渡槽动力分析中,考虑横观各向同性土层的渡槽的最大位移比考虑各向同性土层的渡槽的最大位移有所增加,最大应力有所减小;引入TI介质双渐近-多向透射边界时,渡槽的最大应力与最大位移均有一定程度的下降。在进行渡槽动力分析时,考虑横观各向同性土层并引入TI介质双渐近-多向透射边界能更好地模拟工程实际。In order to analyze the influence of soil on the dynamic response of aqueduct structure under seismic load more reasonably,based on the Mohr Coulomb criterion,the TI medium doubly asymptotic multidirectional transmission boundary principle and Newmark implicit numerical integration method,a dynamic calculation model of aqueduct considering the transversely isotropic of soil layer and TI medium doubly asymptotic multi-directional transmission boundary is established.According to the above dynamic calculation model,the corresponding calculation program is compiled,and the aqueduct model under different working conditions is calculated and analyzed by using the calculation program.The results show that:in the dynamic analysis of aqueduct,the consideration of transversely isotropic soil layer increases the maximum displacement and decreases the maximum stress compared with the isotropic soil layer.The maximum stress and displacement of aqueduct decrease to a certain extent when the TI medium doubly asymptotic multi-directional transmission boundary is introduced.In dynamic analysis of aqueduct,considering transversely isotropic soil layer and introducing TI medium doubly asymptotic multi-directional transmission boundary can better simulate the actual engineering situation.

关 键 词：渡槽 相互作用 时程分析 横观各向同性土层 TI介质双渐近-多向透射边界 

分 类 号：TU435[建筑科学—岩土工程]