【摘要】 为了研究南京某公路直墙隧道的地震反应,综合其土体条件差异较大或结构断面形式不同等特性,选取3个典型断面,利用ABAQUS软件进行地震反应分析,分析了结构断面在不同地震强度下的相对水平位移极值、应力水平,结果表明:该隧道软土区结构地震位移反应明显大于硬土区,且地震波动力特性对软土区隧道地震反应影响较大;硬土区隧道在各指定强度地震下墙体均处于弹性变形状态,软土区隧道在E2地震下墙体轻微塑性变形,E3地震下塑性变形较大;不同结构形式共同的应力集中区域为箱涵拱肩和中墙端部,当存在附属结构时,其附属结构周围应力集中区域明显不同。更多还原

【Abstract】 In order to study the seismic response of road tunnel with straight wall in Nanjing city,three typical sections were analyzed using software ABAQUS by comprehensively considering the differences of the soil distribution and the structural section. The horizontal relative displacements and stresses of structural sections on different seismic intensity were calculated. Results showed that the seismic displacement response of structural section in soft soil was obviously larger than that in stiff soil,and the dynamic characteristics of seismic wave had greater impact on the seismic response of tunnel in soft soil. It can be concluded that walls of tunnels in stiff soil remained elastic deformation in all defined intensity ground motions,and slight plastic deformation occurred in moderate intensity ground motions and comparatively large plastic deformation happened in high intensity ground motions on walls of tunnels in soft soil. The research showed that the spandrel and ends of middle walls in box culvert were the common stress concentration zones in different structures,whereas the stress concentration zone differed around attachment structure.更多还原