摘要
研究井字型交叉管廊的纵向抗震分析方法。文中以某预制管廊工程为例,在ABAQUS有限元平台建立了井字型交叉管廊的梁-弹簧模型,采用非线性弹簧单元模拟预制管廊的企口接头,非线性土弹簧模拟土-结构之间的相互作用。计算了井字型管廊在不同地震波入射角度下的地震响应,得到了交叉节点的最不利模式,讨论了地下综合管廊交叉节点间的影响机制。研究表明,交叉节点对地下综合管廊的地震响应有重要影响;当管廊相邻交叉节点的间距小于场地地层变形波长的1/15时,交叉节点间的相互影响不可忽略。研究方法对地下综合管廊的抗震分析具有一定的参考价值。
In this paper,the longitudinal seismic analysis method of underground utility tunnels with multiple intersections were studied.Taking a prefabricated utility tunnel project as an example,the beam-spring model of the underground utility tunnels were established on the ABAQUS finite element platform.The tongue and groove joints of the prefabricated utility tunnel were simulated with nonlinear spring elements,and the soil-structure interaction was simulated with nonlinear soil springs.The seismic response of the underground utility tunnels with multiple intersections under different incident angles of seismic waves were calculated,and the most unfavorable mode of the cross nodes was obtained.The influence mechanism between the intersection nodes of the underground utility tunnel was further discussed.The research shows that the cross joints have important influence on the seismic response of the underground comprehensive utility tunnel.When the distance between adjacent cross nodes of the utility tunnel is less than 1/15 of the site stratum deformation wave length,the interaction between cross nodes can not be ignored.The method in this paper has a certain reference value for the seismic analysis of underground comprehensive utility tunnel.
作者
董博文
李东桥
梁建文
赵华
DONG Bowen;LI Dongqiao;LIANG Jianwen;ZHAO Hua(School of Civil Engineering,Tianjin University,Tianjin 300350,China;Tianjin Architecture Design Institute,Tianjin 300074,China)
出处
《自然灾害学报》
CSCD
北大核心
2023年第5期90-99,共10页
Journal of Natural Disasters
基金
国家自然科学基金项目(51978462)。
关键词
井字型交叉管廊
预制管廊
纵向抗震分析
最不利模式
梁-弹簧模型
utility tunnels with multiple intersections
prefabricated utility tunnel
longitudinal seismic analysis
the most unfavorable mode
beam-spring model
