刚性限位对基础隔震结构动力响应影响试验研究
引用文献：
杜红凯 韩淼 籍嘉浩 于佳鑫 王海萌. 刚性限位对基础隔震结构动力响应影响试验研究[J]. 建筑结构，2023，48（03）：15-20.
DU Hongkai HAN Miao JI Jiahao YU Jiaxin WANG Haimeng. Experimental study on influence of rigid deformation limitation on dynamic response of base isolation structures[J]. Building Structure，2023,48（03）：15-20.
摘要：为防止隔震层在极罕遇地震作用下出现过大变形而导致隔震设施损坏，部分隔震结构安装了钢墩或钢筋混凝土墩等刚性限位装置。为了研究刚性限位对基础隔震结构动力响应的影响，设计三层单跨钢框架基础隔震结构以及钢墩、钢筋混凝土墩、带橡胶垫层钢墩三种刚性限位器，并进行振动台试验。研究不同预留间隙时三种限位器对基础隔震结构的位移、加速度、接触力以及隔震支座竖向荷载等动力响应影响的规律。试验结果表明，刚性限位器能有效减小其隔震层位移，但也会对上部楼层产生较高大的不利响应，同时会增大隔震支座的竖向荷载，甚至使支座产生拉应力。在钢墩前设置橡胶垫层能明显减小上部结构的加速度响应，对上部结构位移响应、隔震支座竖向力及碰撞点处接触力影响不大。
关键词：基础隔震；刚性限位器；动力响应；振动台试验；
基金：国家自然科学基金资助项目(51378047)；国家自然科学基金资助项目(51408027)；国家重点研发计划项目(2019YFC1509500)。
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[3] 赵建伟，邹立华，方雷庆.考虑相邻建筑物碰撞的基础隔震结构的地震反应分析[J].振动与冲击，2010,29(5):215-219,252.
[4] 黄潇，朱宏平.近断层地震作用下相邻隔震结构的碰撞研究[J].土木工程与管理学报，2011,28(3):249-253.
[5] MATSAGAR V A,JANGID R.S.Seismic response of base-isolated structures during impact with adjacent structures[J].Engineering Structures,2003,25(10):1311-1323.
[6] 刘笑显，李建中，陈旭.X形弹塑性钢挡块对简支梁桥横向地震反应影响[J].振动与冲击，2015,34(2):143-149.
[7] 孟栋梁，高琼，杨孟刚.高铁简支梁桥横向地震碰撞效应振动台试验研究[J].振动与冲击，2019,38(24):63-73.
[8] NAGARAJAIAH S,SUN X H.Base-isolated FCC building:impact response in northridge earthquake[J].Journal of Structural Engineering,2001,127(9):1063-1075.
[9] 樊剑，唐家祥.滑移隔震结构与基坑相碰撞的混沌特性[J].华中理工大学学报，2000,28(8):66-68.
[10] MASROOR A,MOSQUEDA G.Experimental simulation of base-isolated buildings pounding against moat wall and effects on superstructure response[J].Earthquake Engineering & Structural Dynamics,2012,41(14):2093-2109.
[11] 叶昆，陈耀晖，胡轩，等.近断层脉冲型地震动下基础隔震结构的碰撞响应[J].地震工程与工程振动，2014,34(S1):836-840.
[12] 金建敏，肖骥，陈鹏，等.强震下基础隔震结构与挡土墙碰撞响应分析[J].华南地震，2018,38(4):74-83.
[13] 黄潇，胡志祥，刘运林.极罕遇地震作用下LRB基础隔震结构地震响应特性[J].防灾减灾工程学报，2022,42(3):436-444.
[14] 韩淼，蒋金卫，杜红凯.接触动力学参数对隔震结构碰撞挡土墙动力响应影响分析[J].土木工程学报，2020,53(S2):211-217.
Experimental study on influence of rigid deformation limitation on dynamic response of base isolation structures
Abstract: Steel trusses or reinforced concrete blocks are usually installed in isolated structures as rigid deformation limiters to avoid damage to the isolation system caused by excessive isolation deformation under very rare earthquakes. To investigate the influence of rigid deformation limitation on dynamic response of the base isolation structure, a three-story single-span steel frame and three types of rigid deformation limiters including steel trusses, steel concrete blocks, steel trusses with rubber were designed, and shaking table testing was carried out. The influence laws of the three deformation limiters with different reserved gaps on structural dynamic responses, including displacement, acceleration, contact force and vertical force of isolation bearings were researched. The test results show that the rigid deformation limitation can effectively reduce the displacement of the isolation layer, but it also produces a high adverse response to the superstructures, and magnifies the vertical force of the isolation bearing, and even produces tensile stress on the bearing. The rubber cushion in front of the steel truss can obviously weaken the acceleration responses of the superstructure, and has little effect on the displacement responses of the superstructure, the vertical forces of the isolation bearings and the contact force at the contact points.
Keywords: base isolation; rigid deformation limitation; dynamic response; shake table testing
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