［摘要］结合汶川地震中楼梯间的震害表现，根据楼梯的数量与布置方式以及主结构规模与布局构建了18个计算模型，对钢筋混凝土框架结构中楼梯构件的影响效果进行分析研究。结果表明：楼梯构件参与结构整体计算分析后，钢筋混凝土框架结构的侧向刚度、周期、振型、地震作用、层间位移、框架梁柱的地震内力等技术指标均有明显的变化，这种变化与楼梯构件的数量与布置方式以及主体结构的侧向刚度大小等因素密切相关。计算分析还表明，楼梯相关构件（斜板、平台梁、平台柱等）在地震作用下的受力非常复杂，结构设计时应对此有充分的考虑。
［关键词］汶川地震；框架结构；楼梯构件；影响效果；抗震设计 
中图分类号： TU375.4 文献标识码：A文章编号：1002-848X(2011)11-0088-06
Analysis on action effects of stairs in RC frame structures under earthquake
Luo Kaihai, Wang Yayong, Zuo Qiong(CABR Technology Co., Ltd., China Academy of Building Research, Beijing 100013, China)
Abstract: Combined with the damage of stairs during the Wenchuan Earthquake, the 18 structural analysis models were made up, according to the quantity and distribution manner of stairs and the lateral stiffness of main structures, to study the action effects of stairs in RC frame structures. The analysis results indicate that, when the stairs are considered in the whole structural analysis model, there are some evident changes in the technical indexes of RC frame structures, such as lateral stiffness, period, mode, earthquake action, interstory drift, seismic internal forces of structural elements, and so on. Furthermore, there are well correlations between those changes and the factors such as the quantity and distribution manner of stairs, the lateral stiffness of main structures, and so on. The analyses also show that the elements of stairs, such as the slope slabs, the flat beams and the flat columns, are in very complex states under seismic ground motions, so the seismic behaviors of stairs should be considered correctively in the phase of structural design.
Keywords: Wenchuan Earthquake; frame structure; stairs; action effect; seismic design
*“十一五”国家科技支撑计划项目（2009BAJ28B03）。
作者简介：罗开海(1973-),男，博士，副研究员，研究方向：工程抗震，Email：kailuo@263.net。
参考文献
［1］尹保江，黄世敏,程绍革，等. 汶川地震中建筑楼梯震害原因分析［M］. 汶川地震建筑震害调查与灾后重建分析报告, 北京：中国建筑工业出版社, 2008.
［2］马宝民，吕宝宽. 分析汶川楼梯间震害寻求抗震设计对策［C］//第十二届高层建筑抗震技术交流会论文集，北京, 2009.
［3］清华大学,西南交通大学,重庆大学，等. 汶川地震建筑震害分析及设计对策［M］. 北京：中国建筑工业出版社， 2009.
［4］王铁宏，田文,梁文钊. 用全面和辩证的思维做好房屋震害研究分析［M］. 北京：中国建筑工业出版社， 2008.
［5］GB 50011—2001 建筑抗震设计规范［S］. 2008年版. 北京：中国建筑工业出版社， 2008.
［6］国家标准建筑抗震设计规范管理组.《建筑工程抗震设防分类标准》和《建筑抗震设计规范》2008修订统一培训教材［M］. 北京：中国建筑工业出版社， 2009.