(同济大学建筑工程系  上海 200092)
【提要】  研究了钢筋混凝土框架结构层水平承载力和层抗侧移刚度的关系。分析表明，层抗侧移刚度、柱配筋量、竖向荷载对柱子极限弯矩的影响以及钢筋屈服强度是影响层水平承载力的主要因素。考虑这几个主要影响因素，采用统计分析的方法，得到了钢筋混凝土框架结构在水平均布荷载和水平倒三角荷载作用下的层水平承载力统计公式。经过检验，统计公式能够满足工程精度要求，为高层建筑框架结构的安全性评价提供了一种简便的工程方法。
【关键词】  框架结构  承载力  层抗侧移刚度  安全性评价
Analysis of Lateral Load Capacity for Reinforced Concrete Frame Structures/Chen Suwen,Li Guoqiang，Sun Feifei(Dept. of Structural Engineering,Tongji University,Shanghai 200092,China) Abstract:For the reinforced concrete frame structures,the relationship between the story lateral stiffness and lateral loadbearing capacity is studied. The results show that the story lateral stiffness,the reinforcement bar’s configuration and yielding strength, and the vertical load’s effect on the column’s moment capacity are found to be key factors affecting the story lateral loadbearing capacity. Based on the statistical analysis results, a series of formula are obtained for evaluating the lateral loadbearing capacity subjected to the average lateral load and inverted triangle lateral load. The formula provide a convenient approach for safety evaluation of frame structures. Keywords:frame structure;loadbearing capacity;story lateral stiffness;safety evaluation *重大土木及水利工程安全性与耐久性的基础研究(国家攀登计划B)资助项目。