摘要
2021年5月22日青海玛多发生了M 7.4级地震,造成了共和至玉树高速公路部分损毁。首先,基于地震现场考察及资料查阅,介绍了该条公路在此次地震中主要的震害类型及总体的震害情况;其次,统计分析了共玉高速上桥梁震害情况与结构形式等的关系。发现此次地震大桥震害远比中小桥要严重,简支空心板梁桥震害要比连续箱梁严重。鉴于此次地震在极震区缺少强震记录,本文提出一种基于衰减关系和台站土层条件的推测地震动简化方法,从地震动特征角度分析玛多地震对共玉高速破坏机理。最后讨论了此次地震对我国高原地区交通结构抗震的经验与启示。
On May 22,2021,an M7.4 earthquake occurred in Maduo,Qinghai,causing partial damage to the Gonghe-Yushu Expressway.This article first introduced the main types of earthquake damage and the overall damage situation of the highway in the earthquake based on the earthquake site investigation and data review.Then the relationship between the seismic damage of the bridge on the Gongyu Expressway and the structure of the bridge is statistically analyzed.It was found that the earthquake damage of the bridge in this earthquake was far more serious than that of the small and medium-sized bridges,and the earthquake damage of the simply supported hollow slab girder bridge was more serious than that of the continuous box girder.In view of the lack of strong earthquake records in the extreme earthquake zone of this earthquake,this paper proposes a simplified method of inferring ground motion based on attenuation relationship and station soil conditions to analyze the damage mechanism of the Maduo earthquake to Gongyu Expressway from the perspective of ground motion characteristics.Finally,the experience and enlightenment of this earthquake on the seismic resistance of transportation structures in my country's plateau areas are discussed.
作者
蔡丽雯
黄勇
张昊宇
管仲国
CAI Liwen;HUANG Yong;ZHANG Haoyu;GUAN Zhongguo(Seismological Bureau of Qinghai Province,Xining 810001,China;Field Scientific Observation Station for Geodynamics of the Interior of the Qinghai-Tibet Plateau,Golmud 816000,China;Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,CEA,Harbin 150080,China;School of Civil Engineering,Tongji University,Shanghai 200092,China)
出处
《世界地震工程》
CSCD
北大核心
2021年第3期46-56,共11页
World Earthquake Engineering
基金
国家重点研发计划项目(2018YFC1504602-04)
中国地震局工程力学研究所基本科研业务费专项资助项目(2018QJGJ06)
玛多地震科考专项经费。
关键词
青海玛多地震
震害调查
共玉高速
近断层地震
强震记录
Qinghai Maduo earthquake
field investigation
Gongyu Expressway
near-fault earthquake
strong ground motion
