带楼梯框架结构静力推覆分析及弹塑性性能研究

Pushover analysis and research of elastic-plastic performance for frame structure with staircase

通过对带楼梯钢筋混凝土框架结构的静力推覆分析,并与不计入楼梯的框架模型进行分析对比,研究了楼梯对框架结构弹塑性性能的影响以及带楼梯框架结构的屈服机制。研究表明:不计入楼梯计算的常规设计方法不能达到预期的抗震设防目标,为此提出一种楼梯与主体脱离的设计措施。

Through pushover analysis for frame structure with staircase involved or not,the affection of staircase on elastic-plastic performance of frame structure,and the yielding mechanism of frame structure with staircase were studied.Analysis results indicate that the conventional analysis and design without staircase can not meet the expected seismic target.So the suggestion that the stair case is isolated from main structure was put forward for engineering design.