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增量动力分析已经成为结构抗震性能评估的重要方法之一,但其在空间结构中的应用还处于空白.本文利用增量动力分析方法对某单层网壳进行了抗震性能评估.以地震峰值加速度和最大位移为地震动参数和工程需求参数对该网壳进行了增量动力分析.根据分析结果,计算了该网壳在任意峰值加速度下的倒塌概率,结合地震动危险性曲线,得到了该网壳的年度平均倒塌概率.计算结果表明,该单层网壳具有较高的抗倒塌性能;增量动力分析可以应用于单层网壳的地震倒塌评估.
Incremental dynamic analysis has become one of the important methods for seismic performance evaluation of structural structures, but its application in spatial structure is still blank. In this paper, an incremental dynamic analysis method is used to evaluate the seismic performance of a single-layer reticulated shell. According to the analysis results, the collapse probability of the reticulated shell under any peak acceleration is calculated. Combined with the seismic hazard curve, the acceleration and maximum displacement of the reticulated shell are calculated. The results show that the single-layer reticulated shell has high anti-collapse performance and incremental dynamic analysis can be applied to the seismic collapse assessment of single-layer reticulated shell.