既有双链式悬索桥承载力与变形研究  

Research on Bearing Capacity and Deformation of Existing Double-chain Suspension Bridge

作　　者：左迪[1] 

机构地区：[1]天水师范学院土木工程学院,天水市741000

出　　处：《北方交通》2017年第7期4-8,共5页Northern Communications

基　　金：国家青年科学基金项目(51408289)

摘　　要：针对既有悬索桥检测维修工作,将表观检测、有限元理论计算与静动载试验相关联,提出了同时考虑结构强度、韧性、耐久性(抗疲劳和抗锈蚀)耦合作用下的承载能力系数法,对既有悬索桥承载力进行评定,运用此方法验算某悬索桥的承载力与变形,结果表明,经修正后的承载能力系数能很好地反映实桥的受力行为,该悬索桥在当前使用状态下,强度、刚度已不能满足安全性要求,必须予以维修加固。Aiming at the detection and repair work of existing suspension bridge and associating appearance detection,finite element theoretical calculation with static and dynamic load test,the coefficient theory of bearing capacity under the coupling effect of simultaneously considering structural strength, tenacity, and durability（ fatigue resistance and resistance to rust） is put forward to evaluate the bearing capacity of existing suspension bridge and perform check calculation on the bearing capacity and deformation of a suspension bridge by utilizing this kind of method. The results show that,the corrected coefficient of bearing capacity can reflect the mechanical behavior of actual bridge well; the intensity and rigidity of this suspension bridge under the current usage state has not met the requirement of safety,so it is necessary to perform maintenance and reinforcement.

关 键 词：双链式悬索桥 承载力 疲劳 钢材锈蚀 

分 类 号：U446.1[建筑科学—桥梁与隧道工程]