新旧桥梁承载能力评定对比研究  

A Comparative Study on Bearing Capacity Evaluation of New and Old Bridges

作　　者：向绿林 沈晴晴[2] 谢岚[2] 刘剑 

机构地区：[1]福建林业职业技术学院,福建南平353000 [2]中南林业科技大学土木工程与力学学院,湖南长沙410004 [3]广州市市政工程设计研究总院,广东广州510000

出　　处：《防灾科技学院学报》2016年第4期30-36,共7页Journal of Institute of Disaster Prevention

摘　　要：基于36座新建桥梁及26座既有旧桥静、动载试验,将其在荷载作用下挠度、应变及振动频率的现场实际值与有限元计算理论值进行对比分析,获取了新旧桥梁的挠度、应变及频率的检验系数,并在此基础上获取了新旧桥梁的承载能力对比情况。结果表明,既有旧桥承载能力下降明显。这将为类似桥梁检测及承载能力评估提供参考。Based on the static and dynamic load tests on 36 new bridges and 26 old bridges, a comparison is carried out on the actual measuring value and the finite element theoretical value of the deflection, strain and vibration frequency of these bridges under the load, thus obtaining the inspection coefficient of these bridges5 deflection, strain and frequency, and the bearing capacity comparison of these bridges. As the result shows, a clear decrease is detected in the bearing capacity of the old bridges. It’s hoped that this study can serve as a reference for detection and bearing capacity evaluations of similar bridge.

关 键 词：桥梁检测 承载能力 动静荷载 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]