某超高层混合结构基于增量动力分析的地震易损性分析

Seismic Vulnerability Analysis of a Super High-rise Hybrid Structure Based on Incremental Dynamic Analysis

随着计算机技术的不断进步,基于IDA的地震易损性分析可成功运用到建筑结构基于概率的抗震性能评估中。首先介绍了增量动力分析与地震易损性分析的基本原理与方法步骤。然后以深圳某超高层混合结构为算例,从模型的建立、地震波的选择、增量动力分析的实施、结构极限状态的确定以及易损性曲线的绘制几个方面,详细介绍了算例结构进行地震易损性分析的过程。最后对结构进行了基于概率的抗震性能评价,为地震易损性分析应用于超高层建筑结构提供参考。研究结果表明,结构具有良好的抗震性能,满足我国抗震设计规范的三水准设防要求,具有很强的安全储备。

With the continuous progress of computer technology,IDA-based on seismic vulnerability analysis can be successfully applied to probabilistic seismic performance evaluation of building structures.Firstly,the basic principles,methods and steps of incremental dynamic analysis and seismic vulnerability analysis are introduced.Then,taking a superhigh-rise hybrid structure in Shenzhen as an example,this paper introduces the process of seismic vulnerability analysis from the following aspects:the establishment of the model,the selection of seismic waves,the implementation of incremental dynamic analysis,the determination of the limit state of the structure and the drawing of the vulnerability curve.Finally,probabilistic seismic performance evaluation is carried out to provide reference for the application of seismic vulnerability analysis in super high-rise buildings.The results show that the structure has a good seismic performance,meets the requirements of three levels of seismic design code in China,and has a strong safety reserve.