【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。更多还原

【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.更多还原