阻尼支座楼梯间模型振动台试验研究  

Shaking Table Test of Concrete Staircase Model with Damping Supports

作　　者：刘佳 刘涵 彭凌云[2] 尹祎文 刘文 康迎杰 LIU Jia;LIU Han;PENG Lingyun;YIN Yiwen;LIU Wen;KANG Yingjie(Logistics Support Department of Beijing University of Technology,Beijing 100124,China;Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京工业大学后勤保障处,北京100124 [2]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124 [3]清华大学土木工程系,北京100084

出　　处：《地震研究》2022年第4期626-634,共9页Journal of Seismological Research

基　　金：国家自然科学基金项目(51478023)资助。

摘　　要：为研究梯段板下端设置阻尼支座的混凝土楼梯的抗震性能,以某混凝土框架结构底层的楼梯间为原型,设计并制作1/3缩尺的模型结构,对其进行振动台试验。通过输入不同的地震波,观察模型的损伤和破坏情况,分析其动力特性、加速度反应、位移反应及应变反应。结果表明:阻尼支座楼梯释放了梯板的斜撑效应,改变了楼梯的传力途径和内力分布,楼梯构件未发生先于主体结构的破坏;罕遇地震作用下模型破坏较轻,抗震性能良好;阻尼支座未出现明显的竖向翘起现象,水平滑移较小,罕遇地震作用下可保证梯段板与平台板的有效连接。In order to study the seismic performance of the concrete stair with damping support at the lower end of the ladder slab,a 1/3-scale model structure was designed and made,and a shaking table test was carried out.By inputting different seismic waves,the damage and failure of the model were observed,and the dynamic characteristics,acceleration response,displacement response and strain response of the model were analyzed.The results show that the damping bearing stair releases the slanting effect of the stair plate,thus,changes its own force transmission path and internal force distribution.And the stair components do not fail prior to the main structure.In case of the rare earthquake,the damage of the model is light and its seismic performance is good.And the damping support has no obvious vertical warping,and the horizontal slip is small.This proves that the effective connection between the ladder slab and the platform slab can be guaranteed in case of the rare earthquake.

关 键 词：阻尼支座 混凝土楼梯 抗震性能 模型结构 振动台试验 

分 类 号：TU352[建筑科学—结构工程] TU375