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弹塑性动力时程分析方法是确定结构大震安全性的重要方法,也是性能化抗震设计的必要工具和必然趋势。本文基于超高层建筑结构弹塑性分析中累积的经验,对模拟和分析结果判断所遇到的问题提出一些见解,并结合某超高层结构案例的分析结果作为辅助论证。文中提出对连梁、巨柱等构件的模拟应抓住构件的受力和在结构中的作用等特征来简化计算模型,认为在软件还不能准确反映构件或材料细观破坏行为情况下不建议采用精细化的模型。由于结构进入塑性后周期会变长,故本文认为对弹塑性分析的基底剪力、层间位移角等应结合结构动力特性的变化及时程波的动力特性进行综合评判。基于我国规范的性能目标评判标准还有待完善。
Elastoplastic dynamic time history method is an important method to determine the safety of structural large earthquakes and is an essential tool and an inevitable trend of performance-based seismic design. Based on the accumulated experience in the elasto-plastic analysis of super high-rise buildings, this paper presents some opinions on the problems encountered in the simulation and analysis of the results of judgment. Combined with the analysis results of a super high-rise structure case, this paper serves as an auxiliary argument. It is proposed that the simulation of coupled beams, columns and other components should be simplified to the computational model by grasping the components’ forces and the functions in the structure. It is not suggested that the software can not accurately reflect the damage behavior of the components or materials Use a refined model. As the structure becomes longer after it enters the plastic phase, the paper considers that the base shear and interlayer displacement angle of the elastoplastic analysis should be combined with the dynamic characteristics of the structure and the dynamic characteristics of the time-course wave. Criteria for performance targets based on China’s norms still need to be improved.