某独塔单索面斜拉桥的模态变化及索力预测研究  

Research on Modal Change and Cable Force Prediction of Single-cable-plane Cable-stayed Bridge of a Single Tower

作　　者：陈宏杰[1] 王海龙[1] 唐斯聪 王赟鑫 

机构地区：[1]河北建筑工程学院,河北张家口07500

出　　处：《河北建筑工程学院学报》2016年第3期25-31,共7页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：河北省研究生创新基金项目(项目编号301);张家口市科学技术与地震局指令性项目(项目编号1311048B);河北建筑工程学院研究生创新基金项目(项目编号XA201602)

摘　　要：为研究索力损失对独塔单索面斜拉桥抗力能力的影响,以及索力损失的大小,以张家口商务大桥为原型,建立独塔单索面斜拉桥有限元模型,分析了不同索在不同索力损失情况下桥梁的刚度变化情况和桥梁整体的抗力性能,并在ELMAN基础上建立了两阶段预测网络.研究结果表明:索力损失率对某些模态影响较大;两阶段预测网络预测索力损失效果良好.进而为评估桥梁整体抗力能力提供一种新思路.In order to study the influence of cable prestressing loss on resisting power of single-cable-plane cable-stayed bridge of single tower.Based on the Zhangjiakou Business Bridge,the finite ele-ment model of single-cable-plane cable-stayed bridge of single tower is established.The mode vari-ation and the resistance performance of the whole bridge under the different cable and in different loss rate are analyzed.Meanwhile,two-stage forecast is established based on the ELMAN net-work.The result shows that the influence of the loss rate of cable force on some modes cannot be ignored,and it has a good effect to predict the cable prestressing loss by using two-stage forecas-ting network,which provides a new way to evaluate bridge resistance ability.

关 键 词：索力损失 换锁 斜拉桥 模态 数值分析 预测 

分 类 号：U41[交通运输工程—道路与铁道工程]