中、下承式拱桥考虑强健性的变权技术状况评定方法  

Robustness based technical condition evaluation method with variable weight of through and half-through arch bridge

作　　者：范冰辉[1] 陈宝春[1] 吴庆雄[1] FAN Binghui;CHEN Baochun;WU Qingxiong(College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福州大学土木工程学院,福建福州350108

出　　处：《福州大学学报（自然科学版）》2019年第2期223-229,共7页Journal of Fuzhou University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51678154);福建省中青年教师教育科研基金资助项目(JAT170063)

摘　　要：针对现有技术状况评定方法中缺乏考虑结构强健性的问题,提出考虑强健性的变权技术状况评定方法.基于定量计算的强健性指标,得到吊杆与桥道系的强健性权重,以此调整部件权重;根据强健性好坏建立不同的评定方法体系;引入网络层次分析法建立部件权重分析模型,采用专家群决策方法得到更为合理的部件初始权重.以某桥改造前后的两种桥道系结构为例,分别按照现有评定方法和本方法进行分析.结果表明,针对强健性问题突出的中、下承式拱桥,本方法更能反映实际技术状况,更适合于作为桥梁维护决策的依据.To solve the problem that the current specifications for technical condition evaluation can’t reflect the influence of structural robustness, a robustness based technical condition evaluation method with variable weight is proposed. Firstly, the robustness weights of hanger and floor system are obtained through quantitatively calculated robustness index, which are used to adjust the member weight. Secondly, an evaluation system is established, in which different evaluation methods are adopted with regard to structures with different robustness. Then the analytic network process method is introduced to set up the member weight analysis model, and the expert group decision assembling method is adopted to calculate the initial member weights, which are more rational. Finally, a bridge with floor systems before and after modification is taken as example, and the current method as well as the method of this article are used respectively to evaluate the technical condition. The result indicates that, for through and half-through arch bridge, with the noticeable robustness problem, the latter method meets the actual structural technical condition better, thus it is more helping to the bridge maintenance decision making.

关 键 词：拱桥 悬吊桥道系 技术状况评定 变权 强健性 网络层次分析法 

分 类 号：U448.53[建筑科学—桥梁与隧道工程]