静载作用下钢拱桥竖向位移变化规律及安全性
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摘要
公路桥梁在运营过程中,由于多种因素会产生损伤和破坏,严重影响了交通安全和运营使用,进行桥梁结构安全评估是十分有必要。传统桥梁健康状况评估方法存在诸多缺点和限制,实时健康监测系统由于资源、成本等多方面的限制,也不可能得到广泛的应用。基于桥梁在静荷载作用下的竖向位移变化规律和位移的大小,并根据现有规范的规定,通过紫下大桥的工程检测实例,分析和研究了既有钢拱桥梁的安全性,并提出了健康评估方法。
During the using process of high-way bridges,it is sufficiently necessary to appraise the safety of bridge.The bridge will be scathe and destroy because of many effect factors.Meanwhile it will be severity effect to traffic safety and transportation.The traditional method of bridge health status evaluation has much disadvantage and limit,and bridge health monitoring system in real-time can not be widely used because of many limit factors such as resource and cost etc.The vertical displacement change rule and distortion of steel arch bridge on the action of static-load are researched and Zixia bridge inspect sample based on the concerned prescript of criterion in existence.In the mean time,the bridge safety is analyzed and the health evaluate method to the steel arch bridge are put fourard in this paper.
During the using process of high-way bridges,it is sufficiently necessary to appraise the safety of bridge.The bridge will be scathe and destroy because of many effect factors.Meanwhile it will be severity effect to traffic safety and transportation.The traditional method of bridge health status evaluation has much disadvantage and limit,and bridge health monitoring system in real-time can not be widely used because of many limit factors such as resource and cost etc.The vertical displacement change rule and distortion of steel arch bridge on the action of static-load are researched and Zixia bridge inspect sample based on the concerned prescript of criterion in existence.In the mean time,the bridge safety is analyzed and the health evaluate method to the steel arch bridge are put fourard in this paper.
引文
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[2]郭彤,李爱群,李兆霞,等.大跨桥梁结构状态评估方法研究进展[J].东南大学学报(自然科学版),2004,34(5):699-704.
[3]钱稼茹,康钊,赵作周,等.在用市政桥梁基于位移的抗震安全评估[J].工程力学,2006,23(增刊I):194-202.
[4]孙晓燕,黄承逵.既有钢筋混凝土桥梁正常使用极限状态可靠度分析[J].湖南大学学报(自然科学版),2006,33(4):21-25.
[5]裴强,郭迅,张敏政,等.桥梁健康监测及诊断研究综述[J].地震工程与工程振动,2003,23(2):61-67.
[6]陈万春,马建秦.既有桥梁可靠度与安全使用寿命的综合评估[J].公路交通科技,2006,23(7):78-81.
[7]谭金华,陈惟珍,徐俊.桥梁外观调查状态评估方法的比较和应用[J].桥梁建设,2004,(6):73-76.
[8]董学武,张宇峰,徐宏,等.苏通大桥结构健康监测及安全评价系统简介[J].桥梁建设,2006,(4):71-73.
[9]K o J M,N i Y Q,Chan THT.Dynam ic Mon itoring of StructuralHealth in Cab le Supported B ridges[J].Smart Structures andMate-rials:Smart System s for B ridges and H ighways,SPIE 1999,3671:161-172.
[10]交通部.JTJ 023-2004公路钢筋混凝土及预应力混凝土桥涵设计规范[S].北京:人民交通出版社,2004.
[11]谌润水,胡钊芳.公路桥梁荷载试验[M].北京:人民交通出版社,2003,15-29.
[12]宋一帆.公路桥梁荷载试验与结构[M].北京:人民交通出版社,2002.
[13]张俊平.桥梁检测[M].北京:人民交通出版社,2002.
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