基于多指标分级加权法的钢筋混凝土简支梁桥耐久性指标研究  

Study on Durability Indicators of RC Simple-supported Beam Bridge Based on Multi-index Stepwise Weighting Method

作　　者：雷艳丽[1] 郑小燕[2,3] 徐岳[3] 

机构地区：[1]黄河水利职业技术学院,河南开封475003 [2]合肥工业大学交通运输工程学院,安徽合肥230009 [3]长安大学旧桥检测与加固技术交通行业重点实验室,陕西西安710064

出　　处：《公路交通科技》2011年第12期82-87,共6页Journal of Highway and Transportation Research and Development

基　　金：交通运输部西部交通建设科技项目(200631822302-04);开封黄河水利职业技术学院青年教师科研基金项目(2011QNKY010)

摘　　要：为了方便钢筋混凝土简支梁桥结构耐久性评定和耐久性设计,分析了影响钢筋混凝土简支梁桥耐久性的主要因素,针对主要影响因素选择合理的钢筋混凝土结构寿命评估准则,采用多指标分级加权的方法建立了单个构件的耐久性指标表达公式;结合钢筋混凝土简支梁桥的结构特点及其结构受力时的传力方式,分别以主梁、桥面板、桥墩和基础作为主要构件,针对主要构件对桥梁结构进行耐久性研究,采用层次分析法确定各主要构件耐久性指标中影响因素的权重。考虑各构件对结构体系耐久性影响的重要程度,采用重要性系数来反映各构件耐久性对整个结构耐久性的影响,结合单个构件的耐久性指标采用分级加权法提出钢筋混凝土简支梁桥结构体系的耐久性指标表达式。In order to facilitate durability evaluation and durability design of RC simple-supported beam bridge, the main influencing factors of durability of the bridge was studied. To analyze the main influencing factors of durability, the reasonable life assessment criteria of RC structure was selected, and the durability indicator formulas of individual component were established by multi-index stepwise weighting method. Considered the structure characteristics and force transfer way of the bridge, girder, slab, piers and foundation were identified as major component for the durability study. For each major component, the weight of the influence factor of durability indicators were calculated by AHP method. In order to reflect the influence of individual component durability on the whole structure durability, the importance coefficient was introduced, on this basis, the durability indicator formulas of the structure system were put forward based on multi-index stepwise weighting method.

关 键 词：桥梁工程 耐久性 多指标分级加权法 钢筋混凝土简支梁桥 碳化深度 钢筋锈蚀 

分 类 号：U441.4[建筑科学—桥梁与隧道工程]