近断层SV波斜入射下进水塔的非线性响应研究  

Study on nonlinear response of intake tower under oblique incidence of near-fault SV wave

作　　者：张帆[1] 师广山[1] 周毓 司政[2] 宋志强[2] 李闯 王宗凯 ZHANG Fan;SHI Guangshan;ZHOU Yu;SI Zheng;SONG Zhiqiang;LI Chuang;WANG Zongkai(Northwest Engineering Corporation Limited,Xi’an 710065,China;State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [2]西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西西安710048

出　　处：《地震工程与工程振动》2024年第5期149-156,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金面上项目(51879217)。

摘　　要：随着越来越多的水利工程在西部地区发震断裂带建设,使得水利工程遭遇近场地震动的概率也越来越大。近断层地震动由于埋深较浅,地震波垂直入射的假定已不再适用,而目前关于进水塔近断层地震动斜入射下的地震响应研究尚少。以某工程进水塔为例,建立了进水塔三维塑性损伤有限元分析模型,分析了近断层脉冲地震动SV波多角度斜入射下进水塔的非线性响应。结果表明:与地震波垂直入射相比较,近断层地震动SV波斜入射下塔顶位移、加速度响应有明显增大,并且随着角度的增大,塔体损伤面积和损伤程度均有所增大。As more and more water conservancy projects are constructed in the seismogenic fault zone in the western region,the probability of water conservancy projects encountering near-site vibration is also increasing.Due to the shallow buried depth of near-fault ground motions,the assumption of vertical incidence of seismic waves is no longer applicable.At present,there is little research on the seismic response of the intake tower under the oblique incidence of near-fault ground motions.In this paper,taking an engineering intake tower as an example,a three-dimensional plastic damage finite element analysis model of the intake tower is established,and the nonlinear response analysis of near-fault pulse ground motion SV wave under multi-angle oblique incidence is carried out.The results show that the displacement response of tower top under the oblique incidence of near-fault ground motion SV wave increases significantly,and the damage area and damage degree of tower body increase with the increase of angle.

关 键 词：近断层脉冲地震 SV波斜入射 进水塔 非线性响应 

分 类 号：TK733.3[交通运输工程—轮机工程]