【摘要】 框架剪力墙结构中的框架的受力性能不同于纯框架结构。为了考察框架剪力墙结构中的框架在强震下的抗震性态,首先严格按中国设计规范完成了1个8度0.3 g分区24层和1个8度0.2 g分区30层框架剪力墙结构的抗震设计。然后对结构进行了在相当于罕遇水准的多条地面运动输入下的非弹性动力反应分析,初步识别了结构的地震反应性态。分析结果表明,结构中的框架部分在强震下基本保持未屈服状态,而剪力墙连梁是结构主要的塑性耗能部件,部分墙肢底部也进入了屈服后的塑性变形状态。从框架部分所处的偏有利的受力状态和设计规范对其所采取的强化措施这2个方面分析了框架部分未进入屈服的原因。建议对我国8度区总高超过60m的框架剪力墙结构中的框架部分的现行抗震构造措施可有条件地适度放松。更多还原

【Abstract】 To investigate the seismic behaviors of frames in frame-wall structures(dual system),which may be different from those of frame structures,two frame-wall structures were designed conforming to current Chinese design codes.One is a twenty-four-story building on the Zone of Fortification Intensity 8(0.3g),and the other is a thirty-story building on the Zone of Fortification Intensity 8(0.2g).Then inelastic dynamic response analyses of the two structures were conducted with series of inputs of ground motions in a rare earthquake level.The seismic behaviors of the two structures were investigated preliminarily.It was found that the columns and beams of the frames in the frame-wall structures did not experienced yielding under strong earthquake,while coupled beams in walls were the major energy-dissipation elements with their post-yielding plasticity.And the bases of some walls formed hinges as well.The reasons for the frames of dual system remained non-yielding states were analyzed and discussed from the aspects of their favorable load-carrying state and strengthening measures for them in dual systems in Chinese design codes.A preliminary proposal was made that it may be feasible to loosen moderately some seismic fortification measures concerning the frame in the dual system with a height exceeding 60m on the Zone of Fortification Intensity 8.更多还原