大跨度桥梁监测台阵建设初探
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摘要
大跨度桥梁结构震害相对较少,仅在1995年日本神户地震中,只有个别支座等损坏,主要原因是由于大跨度桥梁结构的长柔特性。因此,对于斜拉桥、悬索桥等跨海、跨江大桥需要建立长期监测台阵,实时监测桥梁结构的震动情况,获取强震发生时地面震动、桥梁震动的记录,为大跨度桥梁抗震设计和加固提供科学依据。基于此,本文主要介绍我们大跨度桥梁观测台阵建设的基本思路以及存在的基本问题,以及区别于传统观测手段的新观测仪器在大跨度桥梁观测台阵建设中应用的探讨。
Long-span bridges were seldom damaged in earthquakes,mainly because of their length and flexibility.Only few bearings were damaged during the 1995's Kobe earthquake. Therefore,when it comes to seismic design and reinforcement for suspension bridges and cable-stayed bridges,it is necessary to establish long-term monitoring station for real-time monitoring of the bridges,and to record the ground motion and bridge vibration during strong earthquakes. This paper mainly presents the basic thoughts and problems in construction of monitoring station for long-span bridges,and discusses the application of new observation instruments other than traditional observation methods in monitoring station building.
Long-span bridges were seldom damaged in earthquakes,mainly because of their length and flexibility.Only few bearings were damaged during the 1995's Kobe earthquake. Therefore,when it comes to seismic design and reinforcement for suspension bridges and cable-stayed bridges,it is necessary to establish long-term monitoring station for real-time monitoring of the bridges,and to record the ground motion and bridge vibration during strong earthquakes. This paper mainly presents the basic thoughts and problems in construction of monitoring station for long-span bridges,and discusses the application of new observation instruments other than traditional observation methods in monitoring station building.
引文
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[7]Alampalli S,Fu G K,Dillon E W.Signal versus noise in damage detection by experimental modal analysis[J].Journal of Structural Engineering,ASCE,1997,123(2):237-245.
[8]贺志勇,兰衍亮,戴少平.大跨度桥梁强震动数字监测系统的研制[J].华南理工大学学报(自然科学版),2009,37(3),94-98.HE Zhiyong,LAN Yanliang,DAI Shaoping.Development of digital monitoring system of strong motion for long-span bridges[J].Journal of South China University of Technology(Natural Science Edition),2009,37(3):94-98.(in Chinese)
[9]秦权.桥梁结构的健康监测[J].中国公路学报,2000,13(2):37-42.QIN Quan.Health monitoring of long-span bridges[J].Journal of Highway and Transport,2000,13(2):37-42.(in Chinese)
[2]杜修力,韩强,李忠献,等.5.12汶川地震中山区公路桥梁震害及启示[J].北京工业大学学报.2008,34(12):1270-1279.DU Xiuli,HAN Qiang,LI Zhongxian,et al.The seismic damage of bridge in the 2008 Wenchuan earthquake and lessons from its damage[J].Journal of Beijing university of technology,2008,34(12):1270-1279.(in Chinese)
[3]李鸿晶,陆鸣,温增平,等.汶川地震桥梁震害的特征[J].南京工业大学学报(自然科学版).2009,31(1),24-29.LI Hongjing,LU Ming,WEN Zengping,et al.Characteristics of bridge damages in Wenchuan earthquake[J].Journal of Nanjing University of Technology(Natural Science Edition),2009,31(1),24-29.(in Chinese)
[4]雷俊卿,钱冬生.长大跨桥实时监测预警系统研究[J].公路,2002,2:1-4.LEI Junqing,QIAN Dongsheng.Research on real-time monitoring forecast system for long-span bridges[J].High way,2002,2:1-4.(in Chinese)
[5]王长材,张斌,孙爱芬,等.浅议桥梁健康监测系统发展现状及存在的问题[J].科技向导,2012,18:192-194.WANG Changcai,ZHANG Bin,SUN Aifen,et al.Discussion on development situation and problems of bridge health monitoring system[J].Science and Technology Guide,2012,18:192-194.(in Chinese)
[6]朱彦,承宇,张宇峰,等.基于GPS技术的大跨桥梁实时动态监测系统[J].现代交通技术.2010,7(3),48-51.ZHU Yan,CHENG Yu,ZHANG Yufeng,et al.GPS-based real-time dynamic monitoring system for long span bridge[J].Modern Transportation Technology,2010,7(3),48-51.(in Chinese)
[7]Alampalli S,Fu G K,Dillon E W.Signal versus noise in damage detection by experimental modal analysis[J].Journal of Structural Engineering,ASCE,1997,123(2):237-245.
[8]贺志勇,兰衍亮,戴少平.大跨度桥梁强震动数字监测系统的研制[J].华南理工大学学报(自然科学版),2009,37(3),94-98.HE Zhiyong,LAN Yanliang,DAI Shaoping.Development of digital monitoring system of strong motion for long-span bridges[J].Journal of South China University of Technology(Natural Science Edition),2009,37(3):94-98.(in Chinese)
[9]秦权.桥梁结构的健康监测[J].中国公路学报,2000,13(2):37-42.QIN Quan.Health monitoring of long-span bridges[J].Journal of Highway and Transport,2000,13(2):37-42.(in Chinese)
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