基于模糊系统的铁路钢板梁桥加固效果评估分析  

Fuzzy-system Based Assessment Analysis of Strengthening Effect of Railway Steel Plate Girder Bridge

作　　者：王根会[1] 朱尚清 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]中国路桥集团桥梁技术有限公司,北京100102

出　　处：《铁道学报》2007年第3期123-126,共4页Journal of the China Railway Society

基　　金：兰州交通大学"青蓝"人才工程基金资助项目

摘　　要：由于大部分铁路钢板梁桥在列车提速后竖向刚度和横向刚度都存在严重的不足,为保证铁路运输安全必须对其进行加固,而对其加固效果进行准确评估已成为铁路钢板梁桥研究的重要课题之一。本文利用模糊系统对铁路钢板梁桥的加固效果进行评估。在模糊系统评估中以钢板梁桥的横向振幅及竖向位移作为系统的输入,以加固效果作为系统的输出,并建立输入和输出的隶属度函数。采用MATLAB软件所建立的模糊系统,对桥梁加固效果进行评估分析。最后,通过对一座实桥加固效果的评估分析说明该种方法的有效性。Due to severe deficiency of vertical and lateral stiffness in most railway steel plate girder bridges after train speeds being raised, the bridge structures of existing railways must be strengthened in order to guarantee the safety of railway transportation. In addition, assessment of strengthening effect has become one of the most important topics in the study of railway steel plate girder bridges. In this paper, the strengthening effect of railway steel plate girders is assessed by using the fuzzy system. In the fuzzy system, the lateral vibration amplitude and vertical displacement are used as the input, and the strengthening effect is used as the output, the membership grade functions of the input and output are given. The fuzzy inference system is constructed by applying Software MATLAB to assess the strengthening effect. In the end, the effectiveness of this method is demonstrated through assessment analysis of an existing bridge.

关 键 词：铁路钢板梁桥 模糊系统 加固效果 评估 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]