高速铁路预制装配式大跨度明洞衬砌地震响应的数值分析  

NUMERICAL ANALYSIS ON THE SEISMIC RESPONSE OF PREFABRICATED OPEN CUT TUNNEL WITH LARGE SPAN IN HIGH SPEED RAILWAY

作　　者：周晓军[1] 管鸿浩[2] 王春梅[2] 徐巍 Zhou Xiao-jun;Guan Hong-hao;Wang Chun-mei;Xu Wei

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]中铁第四勘察设计院集团有限公司,武汉400063

出　　处：《建筑技术开发》2024年第2期125-129,共5页Building Technology Development

基　　金：中铁第四勘察设计研究院集团有限公司科研项目(2022K117)。

摘　　要：结合某拟建高速铁路大跨度明洞穿越地层的工程地质和地貌,建立了地层与装配式明洞衬砌的三维有限元模型,并基于粘弹性人工边界,采用时程分析法研究了装配式大跨度明洞衬砌的地震响应,给出了装配式明洞衬砌受地震影响的薄弱部位。结果表明:在高烈度震区装配式明洞衬砌拱肩和拱脚部位以及管片接头处的应力和位移响应较大,是装配式明洞衬砌的薄弱部位,在结构设计时需加强此部位的配筋。此外,与EI波和汶川波相比,天津波对预制装配式明洞衬砌的影响较大。In combination with the engineering geology and landform of strata in which an open cut tunnel is to be built in a high speed railway,tri-dimensional finite element model containing strata and open cut tunnel lining is established to study the seismic response of prefabricated open cut tunnel lining using time-history approach based on viscoelastic artificial boundary.The weak parts of the prefabricated tunnel lining is presented.The results show that the response of stress and displacement in the segment joints at both the spandrel and foot of the prefabricated open cut tunnel lining is much larger in terrain with high seismic intensity,this indicates that these two are the weak parts of the open cut tunnel lining and should be reinforced using more rebars when designing the open cut tunnel.Additionally,as compared with EI wave and Wenchuan seismic wave,the influence of Tianjin wave on the fabricated open cut tunneling is much more serious.

关 键 词：高速铁路 装配式明洞衬砌 地震波 动力响应 数值分析 

分 类 号：TU942[建筑科学—建筑技术科学] U451.4[建筑科学—桥梁与隧道工程]