型钢混凝土框架-钢筋混凝土筒体混合结构位移特征及控制
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摘要
以结构刚度特征值λ和核心筒高宽比H/b为参数,对型钢混凝土框架-钢筋混凝土筒体混合结构参数化模型进行了静力非线性分析.在22组计算结果统计分析的基础上,对混合结构的变形特征、位移控制、位移随地震作用变化规律以及罕遇地震作用下弹塑性位移估计等问题进行了研究.研究结果表明,混合结构抗侧力构件的塑性发展主要集中在结构底部几层,最大层间位移角的控制主要集中在平均0.67倍结构高度位置,大震最大层间位移角和最大有害层间位移角可分别取小震时相应数值的4.5、5.5倍进行位移估计.
By using stiffness characteristic value and core tube aspect ratio H/b as main parameters,nonlinear static analysis is employed to the calculation model of steel reinforced concrete frame-reinforced concrete core wall hybrid structure in the paper.According to the 22 groups of results,the problems about displacement characteristic,control,varied rule and value estimation in seldom occurred earthquake action etc.are studied.The results show that the plastic development in lateral members of hybrid structure mainly occurs at bottom stories,whereas the maximum story drift angle is located in 0.67 structure height.Finally,it is proposed that maximum story drift angle and destructive story drift angle of mode in a large earthquake be valued by 4.5 and 5.5 times of that in small earthquake for displacement estimation.
By using stiffness characteristic value and core tube aspect ratio H/b as main parameters,nonlinear static analysis is employed to the calculation model of steel reinforced concrete frame-reinforced concrete core wall hybrid structure in the paper.According to the 22 groups of results,the problems about displacement characteristic,control,varied rule and value estimation in seldom occurred earthquake action etc.are studied.The results show that the plastic development in lateral members of hybrid structure mainly occurs at bottom stories,whereas the maximum story drift angle is located in 0.67 structure height.Finally,it is proposed that maximum story drift angle and destructive story drift angle of mode in a large earthquake be valued by 4.5 and 5.5 times of that in small earthquake for displacement estimation.
引文
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