考虑整体化层作用的空心板梁桥横向分布计算与承载能力分析  

Lateral Distribution Calculation and Bearing Capacity Analysis of Hollow Slab Girder Bridge Considering Integral Layer

作　　者：郭建民 徐飞萍 康良 李广奇 刘福忠 金泽人 GUO Jianmin;XU Feiping;KANG Liang;LI Guangqi;LIU Fuzhong;JIN Zeren(Shandong Hi-speed Company Limited,Jinan 250014,China;Shandong Transportation Institute,Jinan 250101,China;Department of Bridge Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]山东高速股份有限公司,济南250014 [2]山东省交通科学研究院,济南250101 [3]同济大学桥梁工程系,上海200092

出　　处：《结构工程师》2021年第2期194-199,共6页Structural Engineers

摘　　要：空心板梁桥在城市和公路道路中应用广泛,其横向连接特性是保障结构整体受力的关键。现有设计采用铰接板法计算空心板梁的横向分布系数,未考虑现浇整体化层对预制空心板梁的横向传力特性的影响。本文尝试建立了一个空心板梁结构的通用力学模型,可以综合考虑板梁铰缝以及整体化层对空心板梁桥横向传力特性的影响。对某16 m跨径典型空心板梁桥开展分析,采用有限元方法验证力学模型的准确性与可行性。基于通用力学模型,从横向传力特性和结构承载能力两方面对旧梁加固过程中整体化层厚度的影响进行了探讨。Hollow slab girder bridges are widely used in urban and highway roads,and their lateral connection characteristics are the key to ensuring the overall strength of the structure.The existing design uses the hinged plate method to calculate the lateral distribution coefficient of the hollow slab beam and does not consider the influence of the cast-in-place integrated layer on the lateral force transmission characteristics of the prefabricated hollow slab beam.This paper attempts to establish a general mechanical model of a hollow slab beam structure,which can comprehensively consider the influence of the slab beam joint and the integrated layer on the lateral force transmission characteristics of the hollow slab beam bridge.The analysis of a typical 16 m span typical hollow slab girder bridge is carried out,and the accuracy and feasibility of the mechanical model are verified by the finite element method.Based on the general mechanical model,the influence of the thickness of the integrated layer during the reinforcement process of the old beam was discussed from the aspects of lateral force transmission characteristics and structural bearing capacity.

关 键 词：桥梁工程 空心板梁 整体化层 横向分布 承载能力 旧梁加固 

分 类 号：U441[建筑科学—桥梁与隧道工程]