大跨度斜拉桥的安全性评估研究  

Safety Assessment of Large Span Cable-stayed Bridge

作　　者：伍华成[1] 项贻强 李毅[1] 

机构地区：[1]浙江大学建工学院交通工程研究所,浙江杭州310027

出　　处：《中国市政工程》2006年第1期22-25,共4页China Municipal Engineering

摘　　要：依据建立的斜拉桥安全性评估模型和安全性评估方法及原理,基于矩阵实验室(Matlab)编制了大跨度斜拉桥安全性评估算法,对索力、线形、自振频率等进行了评估。计算结果表明,随着均衡系数"的减小,桥梁构件评估结果是一个加速退化的过程;变权模式作用下的变权权重越发散,评估结果的退化过程越剧烈,均衡系数-评分(Alfa-Grade)曲线曲率越大。According to a model for cable-stayed bridge safety assessment and the way and the principle thereof, the large span cable-stayed bridge safety assessment algorithm is programmed through Matlab (matrix lab), and the safety condition is calculated. Results show that with the decrease of the balance coefficient α, the assessment result is a process of degradation; the more divergent variable weight is, the more severe the degradation of the bridge component assessment and the larger the curvature of Alfa-Grade curve.

关 键 词：斜拉桥 大跨度 安全性 评估 变权综合 斜率关联度 均衡系数 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]