摘要
为了研究既有混凝土弯梁桥的整体式无缝改造后的受力性能,针对混凝土梁桥收缩徐变和桩基等基础变形已基本完成、基础沉降引起的次内力问题也已基本消失的情况,本文建立了考虑结构—土作用的有限元分析模型,对比分析了原有弯梁桥与整体式无缝化改造后的弯梁桥在温度荷载作用下的受力特征。结果表明:整体式改造可以显著改善弯梁桥普遍存在的爬移问题;桥梁结构呈现出了较好的抗扭性能;温度对整体桥结构内力和变形的影响程度要比原桥大,因此整体式无缝弯桥的改造过程中对温度的影响应引起足够的重视,应确保梁端弯矩的增大值在结构安全范围内。该研究结果可为现有病害桥梁的无缝化改造提供借鉴。
In order to study the stress performance of the existing concrete curved beam bridge after the integral seamless transformation,and in view of the fact that the deformation of the foundation such as the shrinkage creep of the concrete beam bridge and the pile foundation has been basically completed and the sub-internal force problem caused by the foundation settlement has basically disappeared,the finite element analysis model considering the structure-soil action is established in this paper.The results show that the integral transformation can significantly improve the common climbing problem of the curved bridge,the bridge structure shows better torsion resistance,and the influence of temperature on the internal force and deformation of the integral bridge structure is greater than that of the original bridge.The results can be used as reference for the seamless transformation of existing diseased bridges.
作者
李冰
胡玉柳
LI Bing;HU Yuliu(Fujian Shipyard Traffic Vocational College,Fuzhou 350007,China;Fuzhou Traffic Construction Group co.,Ltd.,Fuzhou 350001,China)
出处
《东莞理工学院学报》
2021年第1期82-89,共8页
Journal of Dongguan University of Technology
关键词
混凝土曲线桥
整体式无缝化改造
有限元分析
温度荷载
受力特性
Concrete Curve Bridge
integrated seamless transformation
finite element
temperature load
force characteristics
