上海浦东国际机场三期扩建工程卫星厅消能减震项目抗震性能化分析

Seismic performance analysis on energy dissipation satellite hall of Shanghai Pudong International Airport three phase expansion project

上海浦东国际机场卫星厅的中央大厅结构复杂,布置有耗能型屈曲约束支撑,为获得罕遇地震下的结构性能水平以及屈曲约束支撑的耗能情况,采用动力弹塑性时程分析方法对其进行了分析计算。通过动力特性、基底剪力和顶点位移对比分析,验证了模型及计算结果的合理性。根据分析结果可知,层间位移角满足规范要求,构件损伤满足罕遇地震下结构性能设计要求。在罕遇地震下,屈曲约束支撑的耗能优异,不同地震波作用下耗能占比差异较大。将BRB耗能占比最优区间控制在合理的层间位移角范围内,可最大限度地发挥BRB耗能水平。

The struelure of the central hall of Shanghai Pudong International Airport satellite hall buihting is eomplex, and it is arranged with energy dissipation type buckling-restrained braces. In order to obtain the structural performam＇e level under the rare earthquake and the energy dissipation of buckling-restrained braces （BRB）, the dynamie elastic-plastic time-history analysis method was used to analyze and calculate the structure. Through the comparisons of dynamic characteristics, base shear and vertex displacement, the rationality nf the model and the caleulation results were verified. The eah＇ulation results show that the interlayer displacement angle can satisfy the requirement of the code, and the damage of the member meets the design requirements under the rare earthquake. Energy dissipation performance of BRB is exeellent under the rare earthquake, and the energy dissipation ratio of BRB greatly varies under actions of different earthquake waves. The energy dissipation level of BRB can he maximized through controlling the optimal interval of BRB energy dissipation ratio within the reasonable range of the interlayer displacement angle.