基于损伤因子的T形梁桥横向连接构件损伤识别  

Damage identification of transverse connection members of T-beam bridges based on damage factors

作　　者：王立宪[1] 赵俊豪 狄生奎[1] 项长生[1] 党聪 WANG Li-xian;ZHAO Jun-hao;DI Sheng-kui;XIANG Chang-sheng;DANG Cong(School of Civil Engineering,Lanzhou Univ.of Tech.,Lanzhou 730050,China;Zhejiang Zhongnan Curtain Wall Co.Ltd.,Hangzhou 310052,China)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]浙江中南幕墙科技股份有限公司,浙江杭州310051

出　　处：《兰州理工大学学报》2024年第1期123-131,共9页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(51868045,51608245)。

摘　　要：近年来,装配式T形梁桥在我国广泛应用,对桥梁易损位置横向连接构件损伤识别成为关注的热点问题.将T形梁桥的横隔梁简化成等刚度桥面板,采用弹簧体系模拟横向连接构件的受力变形,考虑横向连接构件剪力、横向力和翼缘板变形的影响,提出装配式T形梁桥横向连接构件损伤因子的理论计算式.将MATLAB理论计算、ANSYS数值模拟和实验的结果进行对比,验证损伤因子的有效性,并通过7种模拟工况和3种实际工况的对比,发现荷载作用位置越接近损伤横向连接构件,损伤识别的精确度越高.In recent years,prefabricated T-girder Bridges have been widely used in China.Damage identification of transverse connection members,which is the most vulnerable locations of Bridges,has become a hot issue.This study simplifies the transverse diaphragms of T-beam bridges into equally rigid bridge decks,employing a spring system to simulate the force and deformation of transverse connection components.The theoretical calculation of damage factors for transverse connection components in prefabricated T-beam bridges is proposed,considering the effects of shear force,lateral force,and flange deformation.The theoretical calculation results by MATLAB were compared with the numerical simulation results by ANSYS to verify the effectiveness of the damage factor.Furthermore,through the comparison between 7 simulated conditions and 3 actual conditions,it is found that the closer the load position is to the damaged transverse connection member,the higher the accuracy of damage identification.

关 键 词：装配式T形梁桥 横向连接构件 损伤识别 数值分析 

分 类 号：U446[建筑科学—桥梁与隧道工程]