预应力连续刚构桥裂缝分析  

Analysis on Cracks of Prestressed Continuous Rigid Frame Bridge

作　　者：赵韦皓 郭志光 张凡 吕柏行 ZHAO Wei-hao;GUO Zhi-guang;ZHANG Fan;LYU Bai-hang(China Construction Civil Engineering Co.Ltd.,Beijing 100073,China)

机构地区：[1]中国建筑土木建设有限公司,北京100073

出　　处：《工程建设与设计》2022年第4期26-28,共3页Construction & Design for Engineering

摘　　要：实践表明,大量预应力连续刚构桥在其施工过程中已经产生裂缝,随着成桥后温度、荷载等复杂因素的耦合作用,裂缝会进一步发展,影响桥梁截面刚度,并削弱结构受力整体性。鉴于此,论文总结了预应力连续刚构桥的各裂缝类型并分析其成因,并通过对某连续刚构特大桥建模分析,对因施工阶段纵向预应力损失对连续刚构桥初始裂缝扩展的影响展开分析。The practice shows that a large number of prestressed continuous rigid frame bridges have cracks in the construction process.With the coupling effect of complex factors such as temperature and load after completion of the bridge,the cracks develop further,and eventually affect the section stiffness and weaken the structural integrity.In view of this,this paper summarizes the types of cracks of prestressed continuous rigid frame bridge and analyzes their causes,and through the modeling analysis of a continuous rigid frame bridge,the influence of the longitudinal prestress loss in construction stage on the initial crack growth of continuous rigid frame bridge is analyzed.

关 键 词：连续刚构 裂缝分析 纵向预应力损失 

分 类 号：U445.71[建筑科学—桥梁与隧道工程]