摘要
为研究不同地震作用强度下大跨空间钢结构发生破坏状态的条件概率,定量描述结构的抗震性能,以榆林某实际工程为研究对象,采用SAP2000建立合理的分析数据模型,选用ATC-63推荐的22条远场地震动记录,对结构进行三维地震波激励下的增量动力分析,地震动强度参数选择PGA(峰值地面加速度),以基于结构节点最大位移的损伤指标作为评价指标,根据时程分析的结果,分析此大跨空间钢结构超越各损伤状态的概率。研究表明:此大跨空间钢结构抗震性能优异,有充足的抗震潜能,并且在大震作用下,结构倒塌的概率较小。研究成果可为大跨空间钢结构的抗震设计、地震损失的评估和预测提供参考。
To study the conditional probability of failure state of large-span spatial steel structures under different seismic action intensity and quantitatively describe the seismic performance of the structure, taking a practical project in Yulin as the research object, SAP2000 is used to establish a reasonable analysis data model, and 22 far-field vibration records recommended by ATC-63 are selected to conduct incremental dynamic analysis of the structure under 3D seismic wave excitation. For the analysis, PGA(peak ground acceleration) is selected as the ground motion intensity parameter, and the damage index based on the maximum displacement of structural nodes is used as the evaluation index. According to the results of time history analysis, the probability of exceeding each damage state of the large-span spatial steel structure is analyzed. The research shows that this long-span spatial steel structure has excellent seismic performance and sufficient seismic potential, and the probability of structural collapse is small under the action of large earthquakes.The research results can provide a reference for the seismic design, evaluation and prediction of seismic losses of largespan spatial steel structures.
作者
高慧
GAO Hui(SCEGC No.9 Construction Engineering Group Company Ltd.,Yulin,Shaanxi 719000,China)
出处
《建筑施工》
2022年第8期2003-2006,共4页
Building Construction
关键词
增量动力分析
失效概率
易损性
空间钢结构
incremental dynamic analysis
failure probability
vulnerability
space steel structure
