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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。
Based on the needs of engineering design, this paper presents computational processes that simplify the analysis of the anti-continuous performance of the structure from the perspectives of computational models and computational methods. By simplifying the mechanics analysis and finite element simulation, the validity of the anti-collapse performance of the “non-lateral displacement” frame by single layer instead of the whole structure is verified. Based on the principle of energy conservation, the validity of the maximum dynamic response of the structure considering the slab effect is verified by the quasi-static analysis method. Based on this, a continuous collapse analysis of the CFST structure with no welded joints was carried out. The effects of concrete strength, reinforcement ratio and knuckle length on the anti-collapse performance of this type of structure influences.