城市电力系统设施抗震韧性研究进展  

Seismic response characteristics of sea-crossing cable-stayed bridgesunder the action of offshore and onshore ground motion

作　　者：王宗豪 WANG Zonghao(China Railway 14th Bureau Group Corporation Limited,Jinan 250000,China)

机构地区：[1]中铁十四局集团有限公司,山东济南250000

出　　处：《世界地震工程》2025年第2期173-188,共16页World Earthquake Engineering

摘　　要：城市电力系统为整个城市安全稳定运行提供能源保障,建立韧性电网是打造韧性城市的必要条件,也是我国远景发展战略规划的重大举措。历年以来,电力设施在地震作用下损坏严重,造成了巨大的生命财产损失。因此,如何有效评估潜在地震威胁下电力系统的抗震韧性水平,并提出科学合理的改进建议,对韧性城市的建设以及可持续发展具有重要的理论意义和实用价值。首先,介绍了韧性城市理念的发展历程,以电力系统为主要研究对象,阐述了抗震韧性的定义和内涵;其次,针对输电线路、电气设备、变电站,以及区域电网这四种研究对象,总结了国内外抗震韧性评估方法的研究成果。抗震韧性评估包括震后功能损失评估、应急响应过程模拟和长期恢复模拟三个阶段,其中功能损失表示设施或系统震后供电能力下降程度。针对每一种研究对象,还进一步总结了已有研究的局限性,并对未来的研究前景进行了展望。There are significant differences in site conditions between offshore and onshore areas.Existing studies have shown that offshore and onshore ground motions also exhibit notable differences,particularly in the long-period spectral values of the horizontal components of offshore ground motions.Therefore,analyzing the differences in seismic response of structures with complex configurations,such as cable-stayed bridges,is of great theoretical and practical significance.In this study,strong motion records collected by K-NET in Japan are organized,and the differences in response spectra between offshore and onshore ground motions are compared.Then,a typical cable-stayed bridge with two towers is selected as the research object,and the seismic responses of the bridge under different ground motions are compared by using records of offshore and onshore ground motions collected during seven groups of the same earthquakes.It is found that the vertical and horizontal peak accelerations of offshore ground motions are relatively small,but the spectral values of the horizontal response spectrum in the long-period range are higher than those of onshore ground motions.The most vulnerable locations of the cable-stayed bridge remain the same under offshore and onshore ground motions.However,under offshore ground motions,the curvature of the main beam increases by 46.3%,and the displacement response of the bridge tower is significantly greater than that under onshore ground motions.

关 键 词：抗震韧性 输电线路 电力设备 变电站 韧性电网 

分 类 号：P315.9[天文地球—地震学]