低造价工程塑料板叠层橡胶隔震支座极限性能研究  

Ultimate properties of low-cost engineering plastic plate laminated rubber bearing

作　　者：谭平[1] 刘晗[2] 徐凯 张亚飞[1] 周福霖[1] TAN Ping;LIU Han;XU Kai;ZHANG Yafei;ZHOU Fillin(Cultivation Base for State Key Laboratory of Seismic Control and Structural Safety,Guangzhou University,Guangzhou 510405,China;School of Civil Engineering,Wuhan University,Wuhan 430072,China;Shenzhen General Institute of Architectural Design and Research Co.,Ltd,Shenzhen 518031,China)

机构地区：[1]广州大学减震控制与结构安全国家重点实验室培育基地,广东广州510405 [2]武汉大学土木建筑工程学院,湖北武汉430072 [3]深圳市建筑设计研究总院有限公司,广东深圳518031

出　　处：《建筑结构学报》2020年第6期58-64,共7页Journal of Building Structures

基　　金：国家重点研发计划(2017YFC0703600);教育部创新团队项目(IRT13057);广州市属高校“羊城学者”首席科学家培养项目(1201541630);广东省教育厅创新团队项目(2016KCXTD016)。

摘　　要：采用短切纤维增强工程塑料板作为隔震支座的增强材料,制成低造价隔震支座。与传统隔震支座不同,选用的增强材料强度较低时,低造价隔震支座的极限性能由增强材料的强度控制,破坏形态主要体现为板材的断裂。为了研究该支座特有的破坏形态,进行了轴压和压剪状态的极限性能试验,结合ABAQUS有限元分析,研究不同受力状态下的破坏机理。结果表明:支座轴压的破坏形态为支座中部工程塑料板的断裂,在板材中部产生竖向裂缝,为加劲层拉应力引起的拉断;支座压剪状态下的破坏形态为封板及内部工程塑料板断裂,裂缝在截面上为X形分布,为剪切变形时"翘曲"作用引起的弯曲破坏。利用有限元分析对该支座进行参数优化,建立了不同橡胶层厚度、板厚度及板刚度的3种对比模型,结果表明,减小单层橡胶层厚度、增加板厚度有利于提高支座的极限性能,而提高板刚度则不利。同时,给出了支座性能最优的设计建议。This paper presented a low-cost isolation bearing,in which short-fiber-reinforced engineering plastic sheet was employed to replace the steel sheets used in ordinary isolation bearings. The ultimate properties of this new type of bearing are different from the ordinary ones,as the former is determined by reinforcing materials when their strength is relatively low. Experiments together with ABAQUS analysis on the bearings under compression and shear were carried out to study the mechanical properties and failure mechanism. The results show that vertical failure is caused by the fracture of the sheet in the middle of the isolator due to the peak tension stress. The cracks induced by compressionshear failure are in both end plates and inner sheet,with a"X"shape. The failure is caused by bending of the plastic plates. Parameter optimization is conducted based on FEA models with different rubber thickness,plate thickness and plate stiffness. The results show that increasing the rubber thickness and plate stiffness could increase the capacity of the isolator,and increasing the plate stiffness is detrimental. After that,advices on the design of the isolator were presented.

关 键 词：村镇建筑 低造价隔震支座 模型试验 有限元分析 极限性能 

分 类 号：TU352.1[建筑科学—结构工程] TU317.1