摘要
文中以某钢筋混凝土斜拉桥为背景,对其加固后实际使用性能进行研究分析。根据其原设计方案建立该实桥有限元模型,分析不同工况下主梁应力、竖向位移、裂缝,并与加固后实际使用性能进行对比分析。结果表明,体外预应力加固能够有效提高主梁下缘的抗拉强度,增加结构安全储备;加固后的桥梁承载能力有明显提升,结构整体抵抗弹性变形的能力良好,且在经受弹性变形后有较好的恢复能力。理论计算分析与静力试验结果均可以证明体外预应力加固技术的有效性。
Taking a reinforced concrete cable-stayed bridge as the background,this paper studies and analyzes its oprational performance after reinforcement.Based on the original design scheme,the finite element model of the bridge was established.The stress,vertical displacement and crack of the main beam under different working conditions were analyzed and compared with the actual performance after reinforcement.The results show that external prestressed reinforcement can effectively improve the tensile strength of the lower edge of the main beam and increase the safety margin of the structure.The load-bearing capacity of the reinforced bridge has been significantly improved.The overall structural resistance to elastic deformation is good.Theoretical analysis and static load test results can prove the effectiveness of external prestressed reinforcement technology.
作者
孙全胜
徐圣奇
SUN Quansheng;XU Shengqi(College of Civil Engineering,Northeast Forestry University,Harbin 150040,China)
出处
《低温建筑技术》
2019年第10期63-66,共4页
Low Temperature Architecture Technology
关键词
斜拉桥
体外预应力
加固效果
有限元分析
cable-stayed bridge
external prestressing
reinforcement effect
finite element analysis
