加密T梁桥收缩差引起的病害分析与加固设计探析  

Analysis of Disease Caused by Shrinkage Difference of Encrypting T-BeamBridge and Analysis of Reinforcement Design

作　　者：刘彧 LIU Yu(Fuzhou Luxin Highway Design Co.,Ltd.,Fuzhou 350028)

机构地区：[1]福州路信公路设计有限公司,福建福州350028

出　　处：《福建建筑》2024年第12期66-69,131,共5页Fujian Architecture & Construction

摘　　要：收缩是混凝土结构开裂的重要原因之一。收缩应变产生的裂缝,将影响结构的安全与耐久。因此,对桥梁拼宽时新、旧梁之间收缩差的影响与对策的研究,极其必要。以进行T梁加密的嵩口大桥为例,对其加密改造后出现的病害,采用MidasCivil2022有限元软件进行分析,揭示其因加密引起的新旧梁体收缩附加内力,对结构受力产生的不利影响。在此基础上,提出加固造措施并加以分析,加固后的桥梁运行状况良好。Shrinkage is one of the important causes of cracking in concrete structures.The cracks caused by shrinkage strain will affect the safety and durability of the structure.Therefore,it is extremely necessary to study the impact and countermeasures of the shrinkage difference between new and old beams during bridge widening.Taking the Songkou Bridge with T-beam encryption as an example,the diseases that occurred after the encryption transformation were analyzed using MidasCivil2022 finite element software to reveal the adverse effects of the shrinkage and additional internal forces of the new and old beam bodies caused by the encryption on the structural stress.On this basis,reinforcement measures were proposed and analyzed,and the operation condition of the reinforced bridge was good.

关 键 词：嵩口大桥 改造 收缩差 开裂 有限元 

分 类 号：U44[建筑科学—桥梁与隧道工程]