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在基于性能的抗震设计中,增量动力分析法(IDA)常被用于计算结构的动力反应、损伤性能及可能的经济损失。这种设计方法弥补了传统单一的、基于生命安全的抗震设计方法的缺陷,能够可靠地保证建筑结构的功能在地震的作用下不致丧失乃至不受影响。采用IDA法对生态复合墙结构进行了抗震性能分析,提出了生态复合墙结构抗震性态目标量化的确定方法,并通过IDA曲线分析,得到了结构的倒塌储备系数(CMR),评价了生态复合墙结构的抗震性能。通过工程实例分析表明:在8度大震作用下,生态复合墙结构倒塌的概率较小,约为7.5%,具有较好的抗震性能。
In performance-based seismic design, incremental dynamic analysis (IDA) is often used to calculate the structural dynamic response, damage performance and possible economic losses. This design method compensates for the shortcomings of the traditional single life-safety-based seismic design method and can reliably ensure that the function of the building structure will not be lost or even be affected by the earthquake. The method of IDA was used to analyze the seismic performance of the ecological composite wall structure, and the method to quantify the seismic performance of the composite wall was proposed. Through the IDA curve analysis, the collapse reserve coefficient (CMR) of the structure was obtained, Seismic performance of wall structure. The engineering example shows that under the action of 8 degree earthquake, the probability of ecological composite wall structure collapsing is small, about 7.5%, which has good seismic performance.