农村公路石拱桥检测及承载能力评定  

Detection and bearing capacity evaluation of rural highway stone arch bridge

作　　者：洪晓江[1,2] 余明东[1,2] 李鑫[1] 

机构地区：[1]西昌学院土木与水利工程学院,四川西昌615000 [2]桥梁无损检测与工程计算四川省高校重点实验室,四川自贡643000

出　　处：《交通科技与经济》2017年第3期27-30,共4页Technology & Economy in Areas of Communications

基　　金：四川省教育厅科研基金项目(16ZB0264);桥梁无损检测与工程计算四川省高校重点实验室开放基金项目(2016QYY03)

摘　　要：既有部分的农村公路老旧石拱桥因修建年代久远已无法获取设计、施工等方面的相关资料,准确客观地评定其健康状况及承载能力具有一定难度。以一典型石拱桥为例,首先,对各结构部件进行技术状况评分,最终评定为四类桥梁;其次,根据检测结果引入检测系数和截面折减系数,对有限元模型参数进行修正,计算出该石拱桥承载能力不满足"公路-II级"的荷载等级要求;最后,根据评定结果提出合理必要的治理措施。The existing old stone arch bridges in some rural area have been unable to obtain the design, construction and other related materials due to the construction of the old age. It is difficult to accurately and objectively evaluate their health status and carrying capacity. Taking a typical stone arch bridge as an example, this paper tries to provide a reference for the same type of bridge detection and evaluation. First of all, through the technical components of the technical status score, the final assessment of the four types of bridges is given. Then, according to the test result, the detection coefficient and the section reduction coefficient are introduced to modify the parameters of the finite element model, and the calculation result shows that the bearing capacity of the stone arch bridge does not meet the requirements of Class Ⅱ load grade. Finally,according to the evaluation result,the reasonable and necessary measures are put forward.

关 键 词：石拱桥 技术状况评定 有限元模型 承载能力 治理措施 

分 类 号：U416.224[交通运输工程—道路与铁道工程]