用于深埋圆形盾构隧道地震效应分析的2种拟静力解析解的对比研究  

Comparative Study on Two Pseudo-Static Analytical Solutions to Seismic Effect for Deep Buried Circular Shield Tunnel

作　　者：晏启祥[1,2] 周侣[1,2] 王春燕[1,2] 唐茂皓 耿萍[1,2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]西南交通大学交通隧道工程教育部重点实验室,四川成都610031

出　　处：《中国铁道科学》2015年第2期45-51,共7页China Railway Science

基　　金：国家自然科学基金资助项目(51178400);国家科技支撑计划项目(2013BAB10B04);教育部新世纪人才资助项目(NCET-11-0713)

摘　　要：对比分析深埋圆形盾构隧道地震效应分析常用的2种拟静力解析解,给出2种拟静力解析解法的弯矩比值、轴力比值的计算公式,研究地层弹性模量和泊松比与弯矩比值、轴力比值的关系,以及界面滑移和不滑移条件下对弯矩比值、轴力比值的影响;建立等效刚度数值模型,通过数值模拟验证这2种拟静力解析解的可靠性。结果表明:界面不滑移时,由这2种拟静力解析解获得的地震附加弯矩较为接近,但附加轴力差异较大;地层弹性模量、泊松比和界面条件对地震附加弯矩影响较小,但对地震附加轴力影响较大;由这2种拟静力解析解法与等效刚度数值解法所得的弯矩、轴力分布规律和极值位置基本一致。推荐在常规深埋圆形盾构隧道抗震设计时优先采用基于薄壁圆柱壳理论的拟静力解析方法。Two common pseudo-static analytical solutions for analyzing the seismic effect of deep buried circular shield tunnel were comparatively studied.The calculation formulas of the moment ratio and axial force ratio between the two pseudo-static analytical solutions were given.The relationships between the moment ratio,axial force ratio and elastic modulus,Poisson ratio and the effect of the interface slip condition on the moment ratio,axial force ratio were studied.The reliability of the two pseudo-static analytical solutions was verified by building numerical analytic model of equivalent stiffness.Research shows that,with no interface slip,the two pseudo-static analytical solutions obtain basically the same additional moment caused by earthquake,but there is great difference in the additional axial force.The elastic modulus,Poisson ratio and interface conditions have little influence on additional moment but great influence on additional axial force.The distribution laws and the occurring positions of the extreme values of the bending moment and the axial force obtained by the two pseudo-static analytical solution methods and the numerical solution of equivalent stiffness are basically in accordance.The pseudo-static analysis method based on the theory of elastic thin-walled cylindrical shell should be the priority to be used in the seismic design of the deep buried circular shield tunnel.

关 键 词：盾构隧道 地震响应 拟静力解析解 等效刚度数值解 

分 类 号：U452.28[建筑科学—桥梁与隧道工程]