【摘要】 采用美国ATC委员会提出的CMR分析方法对大量钢框架模型的抗倒塌储备能力进行分析,通过比较发现梁柱线刚度比和压弯构件的设计应力比是影响钢框架抗倒塌储备系数CMR最主要的两个因素。并对这些模型进行pushover分析,发现合理的梁柱线刚度比能很好地改善结构的超强和延性,而柱强度应力比只对超强影响显著;总结了钢框架二次设计的过程,并通过实例来验证了此方法的可行性。更多还原

【Abstract】 CMR analysis methods proposed by ATC are used to analyze the collapse-prevention margin of the many steel frames.Through comparison,the paper presents that the linear stiffness ratio of beam to column and the design stress ratio of the flexure and compression component are the two major important factors affecting the steel frame with collapse-prevention margin ratio.Based on the pushover analysis of the model,it is found that the reasonable linear stiffness ratio of beam to column can greatly improve the super and ductility,but the column strength stress obviously impacts the super.Finally,the secondary process is summed up,and an example is used to verify the feasibility of this method.更多还原