预应力混凝土连续刚构桥设计与施工应力分析  

Analysis on the Design and Construction Stress of Prestressed Concrete Continuous Rigid Frame Bridge

作　　者：马志远 MA Zhiyuan(Anhui Transport Consulting&Design Institute Co.,Ltd.,Hefei 230000,Anhui,China)

机构地区：[1]安徽省交通规划设计研究总院股份有限公司,安徽合肥230000

出　　处：《工程技术研究》2024年第22期193-195,共3页Engineering and Technological Research

摘　　要：文章通过建立有限元模型,对桥梁在自重与施工荷载作用下的应力分布进行模拟分析。结果显示,跨中、中支点的应力集中明显。在顶板设计中,可通过增加厚度、采用高强度混凝土的方式减小应力集中现象;在底板设计中,可通过增加跨中位置底板厚度、采用复合材料的方式提高结构稳定性。在主梁设计中,调整主梁高度和中支点位置能有效分散应力,提高结构承载能力。This paper conducts simulation analysis of the stress distribution of the bridge under the action of selfweight and construction load by establishing the fi nite element model.The results show that the stress concentration in the middle of the span and at the middle fulcrum is obvious.In the top plate design,the stress concentration phenomenon can be reduced by increasing the thickness and using high strength concrete;in the design of the bottom plate,the structural stability can be improved by increasing the thickness of the bottom plate in the middle of the span and using composite materials.In the design of the main beam,adjusting the height of the main beam and the position of the middle fulcrum can effectively disperse the stress and improve the bearing capacity of the structure.

关 键 词：有限元模型 预应力混凝土 连续刚构桥 顶板 底板 应力分析 

分 类 号：U445[建筑科学—桥梁与隧道工程]