导管架平台地震破坏特性研究

Study of earthquake damage characteristics of a jacket platform

深入了解平台在不同地震下的破坏特性有助于制定平台抗地震破坏控制策略以及指导平台抗震设计。结合增量动力分析方法,确定导管架平台在不同地震作用下的失效模式,通过秩和比法获取结构的最易出现失效模式并与最弱失效模式进行对比,仿真结果表明:该方法下的失效模式与所有实际倒塌模式均较接近且更具备统计意义,便于实际应用。

A deeper understanding of platform damage characteristics resulting from different earthquake scenarios will support the development of strategies for mitigating platform damage by earthquakes and facilitate improved earthquake-resistant designs. In this study,we used incremental dynamic analysis（ IDA） to determine the jacketplatform failure modes of different earthquake scenarios. We obtained the most likely structural failure mode using the rank-sum ratio（ RSR） and then compared it with that of the weakest failure mode. Simulation results show that the failure mode obtained from this method nearly replicates all actual collapse modes,with better statistical significance. This failure mode can be easily used in practical applications.