装配式T梁桥主梁损伤后的横向力学性能

doi:10.13229/j.cnki.jdxbgxb.20211370

摘要/Abstract

摘要：

为研究主梁损伤对装配式T梁桥横向分布系数的影响，基于刚接梁法建立了主梁损伤后的桥梁横向力学模型，分析了主梁损伤后横向分布系数的改变程度。结果表明：主梁损伤程度越大、损伤梁数量越多，损伤梁的横向分布系数降低越大，而周围完好梁的横向分布系数增大越大，且增大率与距损伤梁的横向距离成反比；但主梁刚接时，损伤梁的横向卸载能力及其影响区域均比铰接时的大。如未及时加固损伤梁，则距损伤梁越近的完好梁越先破坏。

关键词: 桥梁工程, 装配式T梁, 主梁损伤, 横向分布系数, 刚接梁

Abstract:

In order to study the variation law of the transverse distribution coefficient of the assembled T beam bridge after any girder damage， based on the rigid-jointed beam method， a transverse mechanical model is established， which is suitable for the different positions and the numbers of girder damage. And the change degree of the transverse distribution coefficient is analyzed with the model. The results show that a transverse unloading occurs after the girder damage. And the larger the girder damage degree is or the more the damaged girders are，the larger the reduction rate of the transverse distribution coefficient of the damaged girder is， while the larger the increasing rate of the transverse distribution coefficient of the intact girder is. And the increasing rate is inversely proportional to the cross range to the damaged girder. In addition， when it is rigid connection between the girders， the transverse unloading capacity and the influence area of the damaged girder are larger than hinged connection between the girders. If the damaged girder is not reinforced in time， the intact girder will be damaged in the order of the closer to the damaged one， the earlier the damage occurs.

Key words: bridge engineering, assembled T beam, main girder damage, transverse distribution coefficients, rigid-connected beam

中图分类号:

U443.3

李春良,侯磊,赵珞珞,刘翔,张洪军,张云龙. 装配式T梁桥主梁损伤后的横向力学性能[J]. 吉林大学学报(工学版), 2023, 53(10): 2869-2878.

Chun-liang LI,Lei HOU,Luo-luo ZHAO,Xiang LIU,Hong-jun ZHANG,Yun-long ZHANG. Transverse mechanical properties of assembled T beam bridge after main girder damage[J]. Journal of Jilin University(Engineering and Technology Edition), 2023, 53(10): 2869-2878.

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