基于模型修正理论的装配式T梁桥荷载横向分布系数计算  

Calculation of Transverse Load Distribution Coefficient of Prefabricated T-beam Bridge Based on Model Modification Theory

作　　者：黄模镇 HUANG Mozhen(Guangdong Guanyue Highway&Bridge Co.,Ltd.,Guangzhou 511400,Guangdong,China)

机构地区：[1]广东冠粤路桥有限公司,广东广州511400

出　　处：《广东交通职业技术学院学报》2024年第2期40-46,共7页Journal of Guangdong Communication Polytechnic

摘　　要：为了计算装配式T梁桥发生主梁损伤情况下的载荷横向分布系数,在刚性横梁法的基础上,选择主梁抗弯刚度损伤折减系数作为待修正参数,再以实测和理论挠度值构造目标函数,并基于L-M法与G-N法相结合法进行多目标优化,得到修正后的荷载横向分布系数。为了验证计算方法的准确性,以一座在役18年的装配式T梁桥为例,进行了荷载试验。结果表明:模型修正后的挠度计算值与实测值相比误差较小,模型修正后的主梁荷载横向分布系数与实测值较为吻合,最大误差仅为3.9%。In order to calculate the lateral distribution coefficient of load in the case of damage to the main beam of a prefabricated T-beam bridge,based on the rigid beam method,the bending stiffness damage reduction coefficient of the main beam is selected as the parameter to be corrected.Then,an objective function is constructed using measured and theoretical deflection values,and multi-objective optimization is carried out using the combination of L-M method and G-N method to obtain the corrected lateral distribution coefficient of load.In order to verify the accuracy of the calculation method,load tests were conducted on a prefabricated T-beam bridge that has been in service for 18 years.The results show that the calculated deflection value after model correction has a small error compared with the measured value,and the transverse distribution coefficient of the main beam load after model correction is in good agreement with the measured value,with a maximum error of only 3.9%.

关 键 词：桥梁工程 装配式桥梁 荷载横向分布系数 刚性横梁法 模型修正理论 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]