河北工业科技2017，Vol.34Issue(3)：177-182,6.DOI:10.7535/hbgykj.2017yx03005
基于倾角影响线的简支梁桥损伤识别
Damage identification of simply-supported beam bridges based on angular influence line
张延庆 1吴贵飞 1邓洪亮1
作者信息
- 1. 北京工业大学建筑工程学院,北京 100124
- 折叠
摘要
Abstract
In order to promote the application of the influence line theory in structural damage identification,the damage identification indexes based on difference and difference curvature of angular influence line before and after the damage of the simply-supported beam bridges are proposed.The concept of angular influence line of simply-supported beam bridges is defined,the formula of angular influence line before and after the damage of the simply-supported beam bridges is derived,the formula of new damage identification indexes is deduced,and the feasibility of using the new damage identification indexes for damage identification is theoretically proved.To verify the correctness of the new damage identification indexes,the finite element model of simply-supported beam bridge is established.The result shows that the difference of angular influence line before and after the damage of the simply-supported beam bridges has a peak value in damage area;the difference curvature of angular influence line before and after the damage of the simply-supported beam bridges is 0 in the non-damage area,and not 0 in the damage area.The conclusion is that the difference of angular influence line before and after the damage of the simply-supported beam bridges can be used to determine the location of damage with high accuracy.By using the difference curvature of angular influence line,it not only has the good recognition effect to the single damage and multiple damage,but also can realize the recognition of the damage degree of the simply-supported beam bridges.关键词
桥涵工程/简支梁桥/倾角影响线/损伤识别/差值/曲率Key words
bridge engineering/simply-supported beam bridges/angular influence line/damage identification/difference/curvature分类
交通工程引用本文复制引用
张延庆,吴贵飞,邓洪亮..基于倾角影响线的简支梁桥损伤识别[J].河北工业科技,2017,34(3):177-182,6.
