既有桥梁承载能力评估方法  

Load-carrying capacity assessment methods of existing bridges

作　　者：宗周红[1] 任伟新[1] 郑振飞[1] 

机构地区：[1]福州大学土木建筑工程学院,福建福州350002

出　　处：《地震工程与工程振动》2005年第5期147-152,共6页Earthquake Engineering and Engineering Dynamics

基　　金：福建省科技攻关重点项目(2003H027)

摘　　要：既有桥梁结构承载能力的评估涉及桥梁状态评定、养护与管理、维修与加固等,不仅是桥梁工程师的基本职责,也是广大业主所非常关心的。本文指出了桥梁评估与设计的基本区别,介绍了桥梁承载力评估的静力方法,分析了中美两国桥梁评估规范的异同。接着提出了一套既有桥梁结构承载能力评估的动力方法,该方法结合现场环境振动试验和有限元分析,具有显著的优点。文中采用2个典型桥例,分析了不同评估方法的结果与结论。最后依据发展要求,讨论了进一步研究的主要方向。The load-carrying capacity assessment of existing bridges is associated with the bridge condition evaluation, maintenance, management, repairing and strengthening. It has become of increasing importance for both bridge design engineers and construction owners. In this paper, the differences between the design and assessment of bridges are addressed and the assessment methods in the specifications of China and America are compared. First, the statics-based assessment methods are discussed. Then, a dynamic-based assessment procedure is proposed, which involves both field ambient vibration testing and finite element analysis and updating. Two typical existing bridges are used as the case studies to simulate the process of evaluation. Finally, further research needs in the load-carrying capacity assessment of existing bridges are presented.

关 键 词：现有桥梁 承载力 静力评估 动力评估 

分 类 号：TU311[建筑科学—结构工程]