地震波入射角对输水隧洞地震响应的影响  

Influence of Seismic Wave Incident Angle to the Seismic Response of Water Diversion Tunnel

作　　者：焦红波[1] 王慧[1] 

机构地区：[1]华北水利水电学院,河南郑州450011

出　　处：《人民黄河》2012年第8期144-146,共3页Yellow River

基　　金：2006年度河南省高等学校青年骨干教师资助计划项目

摘　　要：在均质围岩条件下,结合大伙房输水隧洞二期工程,对输水隧洞混凝土衬砌层进行了地震响应分析。结果表明:随着地震波入射角的增大,衬砌层的径向应力先增大后减小,当地震波入射角为45°时,径向应力最大;环向应力逐渐减小,当入射角为90°时,环向应力趋向于0;纵向应力逐渐增大,当入射角超过75°时,衬砌层的纵向应力超过环向应力。当地震波入射角为45°左右时,衬砌层径向、环向和纵向的动应力均较大,衬砌层的地震响应最不利。Based on the 2nd phase Dahuofang Water Diversion Tunnel Project, the seismic responses of the tunnel concrete lining were analyzed under homogeneous surrounding rock. The results show that the radial stresses of the liner layer increase first and then decrease with the increasing of the seismic wave incident angle and the radical stress is up to the maximum when the seismic wave incident angle is 45°. The hoop stresses re- duce gradually, and the value reduces to zero when the seismic wave incident angle is 90°. However, the longitudinal stresses increase with the in- creasing of the seismic wave incident angle. When the seismic wave incident angle exceeds 75 ° , the longitudinal stresses of the liner layer surpass the hoop stresses. When the seismic wave incident angle is about 45°, the three dynamic stresses of the lining are all larger and its seismic respon- ses are the worst.

关 键 词：输水隧洞 混凝土衬砌 地震响应 地震波入射角 衬砌层 

分 类 号：TV68[水利工程—水利水电工程]