ABSTRACT

The directional uncertainty of earthquakes significantly affects the results of seismic risk assessment and induces more critical responses by structures. This study assessed the seismic performance of a typical marine structure with high seismic vulnerability under the directional uncertainty of earthquakes. A concrete pile-supported wharf has been modeled in SAP2000 to implement damage analysis, and a number of incident angles were randomly selected for incremental dynamic analysis (IDA). IDA-based fragility analysis was carried out to develop the fragility surfaces. Comparison of the fragility surfaces revealed that the critical zones for the predefined damage states were not identical or unique.

摘要

地震的方向不确定性显着影响地震风险评估的结果，并引起结构更关键的反应。本研究评估了具有高地震脆弱性的典型海洋结构在地震方向不确定性下的抗震性能。在SAP2000中对一个混凝土桩支撑码头进行建模，进行损伤分析，随机选取多个入射角进行增量动力分析（IDA）。进行基于 IDA 的脆性分析以开发脆性表面。脆弱性表面的比较表明，预定义损伤状态的关键区域并不相同或唯一。