钢筋混凝土框架结构动力倒塌分析方法研究

The Analysis Method of Progressive Collapse of Reinforced Concrete Frame Structure

本文采用了"位移法"和"反力法"对失柱的混凝土框架结构进行线性与非线性动力倒塌分析,并把位移法与反力法的分析结果进行对比,两者吻合较好,同时采用线性动力与非线性动力计算方法分别对具有相同平面布置不同高度的框架结构进行连续倒塌模拟分析,得到不同失效时间失效点的位移时程曲线。分析结果表明:柱的失效时间对位移法和反力法线性动力分析结果影响较小,随着失效时间的增大,结构的动力效应趋于收敛;柱的失效时间对位移法和反力法非线性动力分析结果影响较大,但是随着失效时间的增加,结构的动力效应趋于收敛。

The ＂ displacement method＂ and ＂ force method＂ were adopted to carry on the linear and nonlinear dynamic collapse analysis for concrete frame structure with lost column,and the displacement method and the force method of analysis results were compared. The results show that both are in good agreement,at the same time linear and nonlinear dynamic calculation methods were used to analyze progressive collapse for the same plan layout with different height of frame structure and get failure point displacement time-history curve of different column failure time and different period,analysis results indicate： column failure time has almost no effect on results of linear dynamic analysis,with the increase of time,the structural dynamic response tend to converge;column failure time has an effect on results of nonlinear dynamic analysis,but as the failure time increases,structural dynamic response tends to converge.