弹性软碰撞防护装置试验研究  

Experimental study on elastic soft impact protection device

作　　者：金建敏[1] 肖骥 谭平[1] 刘彦辉[1] 陈鹏[1] 朱健[2] JIN Jianmin;XIAO Ji;TAN Ping;LIU Yanhui;CHEN Peng;ZHU Jian(Earthquake Engineering Research&Test Center,Guangzhou University,Guangzhou 510405,China;Department of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]广州大学工程抗震研究中心,广东广州510405 [2]宁夏大学土木与水利工程学院,宁夏银川750021

出　　处：《西安建筑科技大学学报（自然科学版）》2020年第1期63-71,共9页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：广州市科技计划基金项目(201707010333);国家重点研发计划基金项目(2016YFC0701507,2017YFC0703600);国家自然科学基金项目(51778163,51468050)。

摘　　要：为限制隔震层位移,对能提供刚度的弹性软碰撞防护装置进行了试验研究,该装置主要由天然橡胶支座、剪力键及中空连接钢板组成.首先对天然橡胶支座进行了设计压应力12 MPa下基本性能试验及压应力0 MPa下剪切试验.然后,进行了三种型号的弹性软碰撞防护装置的水平力学性能测试试验,测定该类装置的水平等效刚度及支座顶端在装置工作过程中的转角,探讨不同剪力键连接方式、不同材质的剪力键及中空连接钢板、剪力键外圆面是否罩橡胶套、不同支座直径以及不同橡胶剪切模量的影响及差异.对比分析了弹性软碰撞防护装置的水平等效刚度与支座部分在0 MPa下试验结果的差异.结果表明:单纯采用过盈配合的连接方式,剪力键存在松动的可能,改进的连接方式是可行的,在剪力键外圆面罩上橡胶套后可避免或减轻中空连接钢板的损伤;与0 MPa下支座试验结果相比较,装置水平等效刚度的降低程度及支座顶端转角随支座部分剪应变的增大而增大;不同支座直径及不同橡胶剪切模量,装置水平等效刚度的降低程度及支座顶端转角有所差异.In order to limit the displacement of the isolation layer,tests are conducted to the elastic soft impact protection device,which can provide stiffness.The device is mainly composed of linear natural rubber bearing,shear key and hollow connecting steel plate.Firstly,the basic performance test under design compressive stress of 12 MPa and the shear test under compressive stress of 0 MPa of liner natural rubber bearing are carried out.Then,three types of elastic soft impact protective devices are tested for the horizontal mechanical performance,in determining the horizontal equivalent stiffness of the device and rotation angle at the top end of the rubber bearing.The influence as well as difference of connection modes of shear key,different material of shear key and the hollow connecting steel plate,the outer surface of the shear key is covered with rubber bush or not,different bearing diameters and different shear modulus of rubber are discussed.The difference of the horizontal equivalent stiffness between the elastic soft impact protection device and the test results of the bearing parts under 0 MPa is compared and analyzed.Results show that shear keys may be loosened by using interference fit only,and the improved connection modes are feasible.The damage of hollow connection steel plate can be avoided or mitigated by covered the shear keys with rubber bush.Compared with test results of the bearing under 0 MPa,the degree of the horizontal equivalent stiffness decrease of the device and the rotation angle at the top end of the bearing increase with the shear strain of the bearing part.The degree of the horizontal equiva lent stiffness decrease and the rotation angle at the top end of the bearing are different with different bearing diameters and different shear modulus of rubber.

关 键 词：弹性软碰撞防护装置 天然橡胶支座 剪力键 中空连接钢板 试验研究 

分 类 号：TU352.1[建筑科学—结构工程]