（1 长春工程学院土木工程学院， 长春 130012； 2 中元国际(长春)设计研究院有限公司，  长春 130012）

［摘要］采用拟静力方法对1∶2缩尺模型框架结构中的现浇钢筋混凝土板式楼梯受力性能进行试验研究，对比了常规设计与加强后楼梯的抗震性能，并采用有限元分析了楼梯对整体结构的影响及楼梯在地震作用下的内力。结果表明，梯柱、梯梁的可靠性与梯段板的拉力互相制约，梯柱、梯梁强则梯段板拉力大，反之亦然。常规的加强设计难以保证楼梯的抗震性能，框架结构中的楼梯宜采用弱化楼梯斜梯段支撑作用的设计方法，并对楼梯结构进行适当加强。

［关键词］楼梯； 抗震性能； 试验研究； 框架结构

中图分类号：TU375文献标识码：A文章编号：1002-848X(2018)17-0072-05

Experimental study on seismic performance of the stairs in frame structure

Yuan Zhiren1, Dou Lijun1, Li Yingchao2, Wang Tan1

(1 Civil Engineering Department, Changchun Institute of Technology, Changchun 130012， China; 2 IPPR(Changchun) Engineering Design & Research Institute Co., Ltd.,   Changchun 130012， China)

Abstract:The quasi-static loading test method was used to test the mechanical behavior of cast-in place reinforced concrete slab stair in the 1/2 scale specimen. The seismic performance of a normal designed stair and a reinforced designed stair was compared. The influence of stair on whole structure and the internal force of stair under earthquake action were analyzed by finite element method. The result shows that the reliability of the ladder column and the ladder beam is independent of the tension of the ladder plate, the stronger the ladder column and beam, the larger the tensile force of ladder plate. The conventional strengthening design method is difficult to guarantee the seismic performance of the stairs. The stairs in the frame structure should adopt the design method of weakening inclined ladder plate support and strengthen the stair structure.

Keywords:stair; seismic performance; experimental research; frame structure

*吉林省科技厅社会发展重点项目资助（20090423），公共建筑疏散通道抗震技术研究（20090423）。

作者简介：袁志仁，硕士，讲师，Email：yzr117@qq.com。