桥梁结构耐久性设计方法研究

分析了目前桥梁结构耐久性研究中存在的问题。在比较了各国几种主要耐久性设计理论和方法的基础上,提出了一种新的耐久性设计思路和方法,即利用耐久度来衡量结构保持耐久性的能力,通过计算耐久性指标来评判某一时刻结构耐久性能否满足设计要求。该方法强调了多种因素共同作用、结构体系和构件荷载类别以及桥梁寿命周期经济性对耐久性设计的影响,具有概念明确、形式简单、便于应用等特点。

Study of durability design method for bridge structures

Main problems in the study of durability for bridge structures are presented. Based on comparison of main durability design methods, a new approach for durability design is proposed. Durability degree is brought forward to assess the structure's ability to keep durability, and bridge durability is satisfied the demand or not can be judged by the calculation of durability index. The presented method, which emphasizes the importance of bridge structure system, detail design, load and service life cycle cost analysis for durability design has the advantages of explicit conception and simple form.