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本文以一典型的钢-混凝土混合结构为研究对象,应用耐震时程法(ET法)对其进行抗震分析计算与评估,并将计算与评估的结果与一般动力时程分析(THA)方法、增量动力弹塑性时程分析(IDA)方法、模型振动台实验方法得到的结果进行了对比。同时,进一步探讨了ET法计算中输入加速度时程曲线生成的不确定性及其对钢-混凝土混合结构抗震性能评估的影响。结果表明:ET法的结构抗震性能评估结果较THA方法更为可靠,采用结构各楼层的最大层间位移角或结构的最大顶点位移作为指标可以得到与IDA方法相当的地震损伤评估结果,并且计算效率大幅度提高。此外,初始波的选取对输入地震动加速度时程曲线生成的影响不能忽略,建议采用4条以上输入人工波进行耐震时程计算并取其极值或均值作为结构抗震性能评估的依据。
In this paper, a typical steel-concrete hybrid structure is taken as the research object. The seismic analysis and evaluation are carried out using the seismic time history method (ET method). The results of the calculation and evaluation are compared with the general dynamic time history analysis (THA) Incremental dynamic elasto-plastic time history analysis (IDA) method and model shaking table experimental results are compared. At the same time, the uncertainty of the time-history curve of input acceleration and its influence on the seismic performance of steel-concrete hybrid structures are further discussed. The results show that the seismic performance of the ET method is more reliable than that of the THA method. The seismic damage assessment results equivalent to the IDA method can be obtained by using the maximum inter-story displacement angle or the maximum vertex displacement of the structure as an index. Greater efficiency. In addition, the influence of initial wave selection on the generation of time-history curve of input seismic acceleration can not be neglected. It is suggested that more than four input artificial waves should be used to calculate the seismic time history and take the extreme value or average value as the basis to evaluate the seismic performance of the structure.