摘要
本文首先给出钢桁架拱-混凝土梁组合体系桥梁设计方案,受力上采用强梁弱拱,既降低了杆件的尺寸和钢材的用量,又兼顾了桥梁美观,施工上采用先梁后拱的施工顺序,采用满堂支架施工方法。然后对桥梁整体及关键节点进行了有限元分析,钢拱肋和混凝土主梁结合的部位施工是关键所在。在各工况下,本桥的强度、刚度、稳定性都满足规范要求,为同类工程设计和施工提供参考。
Firstly, a design of steel truss arch-concrete beam composite system bridge is given in this paper. Strong beam and weak arch are adopted in mechanical behavior, which not only reduces the size of bars and the amount of steel, but also takes into account the beauty of the bridge. In terms of construction methods, the beams are constructed before the arches and the full support construction method is adopted. Then the finite element analysis of the overall bridge and main joints is carried out. The construction of the joint of steel arch rib and concrete girder is the key point. Under various working conditions, the strength, stiffness and stability of this bridge meet the requirements of the codes. It provides a reference for similar engineering design and construction.
作者
周彦锋
刘伟
ZHOU Yanfeng;LIU Wei(Jiangsu Province Communications Planning and Design Institute Co., Ltd., Nanjing 210014, China)
出处
《低温建筑技术》
2018年第12期60-64,共5页
Low Temperature Architecture Technology
关键词
钢桁架拱
梁格法
强梁弱拱
steel truss arch
beam grillage analysis method
strong beam and weak arch
