隔震橡胶支座楼梯间模型结构振动台试验研究

发布时间：2018-03-19 11:23

本文选题：楼梯　切入点：隔震橡胶支座　出处：《建筑结构学报》2017年08期 　论文类型：期刊论文

【摘要】：为检验梯段板下端设置隔震橡胶支座和聚四氟乙烯板滑动支座对现浇钢筋混凝土(RC)板式楼梯抗震性能的影响,以设置这两种支座的RC楼梯间框架结构单元为对象,对缩尺比例为1∶3的模型结构进行了振动台试验。通过输入不同的地震波,观察其破坏过程,分析其遭遇不同水准地震作用时模型结构的自振频率变化、加速度反应、位移反应和破坏机制等。试验结果表明:梯段板下端设置隔震橡胶支座的楼梯单元具有良好的抗震性能,罕遇地震作用下破坏主要集中在框架结构中,有效地释放了梯段板的斜撑效应,实现了楼梯子结构迟于主体结构发生严重破坏的设计目标;采用聚四氟乙烯板滑动支座时,在共振破坏试验中梯段板出现剧烈的竖向翘起、左右晃动现象;采用隔震橡胶支座时,梯段板竖向加速度有所减小,且共振破坏试验中未出现晃动现象。
[Abstract]:In order to test the effect of rubber isolation support and sliding support on the seismic performance of cast-in-place reinforced concrete (RC) slab staircase at the bottom of the ladder plate, the RC stairwell frame unit with these two supports is taken as the object. The shaking table test of the model structure with scale of 1: 3 is carried out. By inputting different seismic waves, the failure process of the model structure is observed, and the natural vibration frequency and acceleration response of the model structure are analyzed when the model structure is subjected to different levels of earthquake. The test results show that the staircase unit with isolation rubber bearing at the lower end of the ladder plate has good seismic performance, and the damage under rare earthquake is mainly concentrated in the frame structure. The inclined bracing effect of the ladder plate is effectively released, and the design goal of serious damage to the staircase substructure later than the main structure is realized. The vertical acceleration of the ladder plate decreases and there is no sloshing phenomenon in the resonance failure test.
【作者单位】：中国建筑西北设计研究院有限公司;西安建筑科技大学土木工程学院;
【基金】：中国建筑股份有限公司科技研发课题(CSCEC-2015-Z-41) 国家自然科学基金项目(51278402)
【分类号】：TU352.12

【参考文献】