基于增量动力分析的超高层混合结构地震易损性分析

在增量动力分析的基础上，结合地震易损性分析，提出了基于增量动力分析的超高层混合结构地震易损性分析方法，该方法可以从概率角度定量评估该类工程结构的抗震性能。以设计的某50层超高层混合结构为算例，采用上述方法对该结构进行地震易损性分析，依据指定不同强度地震作用下各极限状态的结构地震易损性概率，评定该结构的抗震性能。结果表明：该超高层混合结构在7度多遇地震作用下，处于正常使用和基本可使用状态；在7度设防地震作用下，处于基本可使用和修复后使用状态；在7度罕遇地震作用下，处于修复后使用和生命安全状态。该结构基本满足“小震不坏、中震可修、大震不倒”的抗震要求，具有良好的抗震性能。

Seismic vulnerability analysis of super high-rise hybrid structures based on incremental dynamic analysis

On the basis of incremental dynamic analysis, combined with seismic vulnerability analysis, a seismic vulnerability analysis method of high-rise steel-concrete hybrid buildings was presented to quantitatively assess the seismic performance of structures from the probability point of view. Taking a 50-story high-rise steel-concrete hybrid building as an example, the seismic vulnerability of the structure was estimated. According to the seismic vulnerability probabilities of the limit states under various given ground motion intensity levels, the seismic performance of the structure was evaluated. It is shown that the high-rise steel-concrete hybrid building is in serviceability state or basic serviceability state under frequent ground motions of intensity seven, in basic serviceability state or reparability state under fortification ground motions of intensity seven and in reparability state or life safety state under rare ground motions of intensity seven. The structure has a good seismic performance and can basically meet the requirements of ‘perfect subjected to minor earthquake, reparable subjected to moderate earthquake, no collapse subjected to unexpected major earthquake’.