| 竖向地震作用对储液罐地震响应的影响分析 |
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| 引用本文： | 张如林,程旭东,王淮峰,管友海.竖向地震作用对储液罐地震响应的影响分析[J].西北地震学报,2017,39(4):592-599. |
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| 作者姓名： | 张如林 程旭东 王淮峰 管友海 |
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| 作者单位： | 中国石油大学(华东)储运与建筑工程学院, 山东 青岛 266580,中国石油大学(华东)储运与建筑工程学院, 山东 青岛 266580,厦门理工学院 土木工程与建筑学院, 福建 厦门 361000,中国石油大学(华东)储运与建筑工程学院, 山东 青岛 266580 |
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| 基金项目： | 国家自然科学基金资助项目（51408609，51608462）；山东省高等学校科技计划项目（J14LG51） |
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| 摘 要： | 地震作用下大型储液罐的安全问题日益引起重视。基于ANSYS软件建立储罐液体耦合有限元模型,考虑罐底非线性接触效应,以El-Centro南北向和竖直向记录地震波为输入,研究水平激励以及水平和竖向同时激励两种工况下储罐的动力响应。研究结果表明,两种工况下靠近罐底1.2m处均发生了"象足"变形,竖向激励下水平相对位移增加了14%。竖向激励使得罐壁环向应力和轴向压应力均有不同程度的增加。竖向地震激励对液面的竖向晃动影响较小。储液罐底板在地震作用下发生了竖向提离和永久滑移,竖向激励时增长幅度均在10%左右。同时罐体基底剪力在竖向地震作用下也有所增大。储罐抗震设计时应考虑竖向地震分量的影响,研究结论可为立式储罐的抗震设计提供一定的参考和依据。
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| 关 键 词： | 储罐 地震响应 接触效应 提离 竖向激励 |
| 收稿时间： | 2016/9/6 0:00:00 |
Analysis of Influence of Vertical Earthquake Action on theSeismic Response of Liquid Storage Tank |
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| ZHANG Ru-lin,CHENG Xu-dong,WANG Huai-feng and GUAN You-hai.Analysis of Influence of Vertical Earthquake Action on theSeismic Response of Liquid Storage Tank[J].Northwestern Seismological Journal,2017,39(4):592-599. |
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| Authors: | ZHANG Ru-lin CHENG Xu-dong WANG Huai-feng and GUAN You-hai |
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| Institution: | College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, China,College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, China,School of Civil Engineering and Architecture, Xiamen University of Technology, Xiamen 361000, Fujian, China and College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580, Shandong, China |
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| Abstract: | The earthquake safety of large storage tanks is a matter of great concern today. In this study, we used ANSYS software to establish a finite element model of the tank-liquid coupled system and consider the nonlinear contact effect between the tank bottom and foundation. We selected the El-Centro earthquake wave in the north-south and vertical directions, which is typically selected as input, for our analysis of the tank-liquid coupled system. Then, we investigated the seismic response of the storage tank in two cases-under horizontal earthquake excitation and under simultaneous horizontal and vertical earthquake excitation. Our study results show elephant-foot deformation to occur within 1.2 m of the tank wall bottom, which produces a larger relative horizontal displacement in the tank wall bottom in the case with simultaneous horizontal and vertical earthquake excitation. In addition, we observed there to be some influence on the hoop stress, axial compressive stress on the tank wall, and base shear of different degrees under simultaneous horizontal and vertical earthquake excitation, but little effect on the vertical shaking of the liquid. We observed some obvious nonlinear uplift and permanent slippage at the tank wall bottom under the simultaneous horizontal and vertical earthquake excitation. The influence of vertical excitation on the tank response is unfavorable and cannot be ignored. Thus, the seismic design of storage tanks should consider the impact of vertical seismic-wave excitation. These research conclusions provide a reference and basis for the future seismic design of vertical storage tanks. |
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| Keywords: | storage tank seismic response contact effect uplift vertical excitation |
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