摘要
为实时监测桥梁结构振动状况和记录大型桥梁真实地震反应,在虎门大桥悬索桥东西主塔、箱梁上架设了总计36通道的强震动监测系统。简要介绍了该监测系统的测点布置、系统构成和技术特点,并重点对系统在2013年2月22日河源4.8级地震中的强震动记录进行了分析,讨论了由于局部场地条件差异引起的多点地震动输入问题。
Humen bridge is located at the estuary of the Zhujiang （Pearl） river carrying the Guangzhou-Shenzhen-Zhuhai Superhighway which links up Guangzhou City to the Shenzhen and Zhuhai Special Economic Zones,Hong Kong and Macao.Its main channel is a long span steel suspension bridge with a main span of 888 m.To monitor its real-time vibration and capture possible earthquake responses,a vibration monitoring system comprising 36-channel accelerometers has been set up at its main span.The location of sensors,equipments and technical features of the monitoring system are briefly introduced first in this paper.Then the strong motion records in Heyuan M 4.8 earthquake on Feb.22,2013 are analyzed.The multi-supported input phenomenon caused by local site effect was identified and discussed.
出处
《地震地磁观测与研究》
2013年第5期292-300,共9页
Seismological and Geomagnetic Observation and Research
基金
广东省科技计划项目(2010A030200010
2012A080102008)
广东省自然科学基金项目(9451007008004128)资助
关键词
虎门大桥
强震动记录
场地效应
多点输入
河源4
8级地震
Humen bridge
strong motion record
site effect
multi-supported input
Heyuan M 4.8 earthquake
