【摘要】 基于工程设计的需要,分别从计算模型以及计算方法的角度着手,提出简化分析结构抗连续性能的计算流程。通过简化力学分析及有限元模拟的方式,验证对"非侧移"框架采用单层代替整体结构分析抗倒塌性能的有效性。并基于能量守恒原理,验证采用拟静力分析方法获得考虑楼板效应的结构最大动力响应的有效性。在此基础上,针对采用新型施工现场无焊接节点的钢管混凝土(CFST)结构进行了抗连续性倒塌分析,研究了混凝土强度、配筋率以及节点牛腿长度对该种结构类型抗倒塌性能的影响。更多还原

【Abstract】 Considering the need of practical project design,a framework of simplified assessing method is proposed based on the calculation model and simulation techniques.The potential of structural collapse of single level frame is utilized to represent the potential of whole non-sway structural model and this simplification assumption is verified with simplified mechanical and finite element methods.Based on the principle of energy conservation,pseudo-static analysis method is also verified in evaluating the peak structural dynamic response when considering the slab membrane action.Finally the potential of the structural progressive collapse of CFST structure with joint is analyzed,in which no welding is necessary in construction field.The influence of concrete strength,reinforcement ratio of beam and the bracket length are also investigated.更多还原