钢盖梁在高架桥分期实施中的应用方案和受力性能研究  

Research on Application and Structural Performance of Steel Cap Beam in Phased Construction of Viaduct

作　　者：肜辉 RONG Hui(Zhengzhou Design Institute of China Railway Engineering Design Consulting Group Co.Ltd.,Zhengzhou 450001,China)

机构地区：[1]中铁工程设计咨询集团有限公司郑州设计院,郑州市450001

出　　处：《公路》2025年第4期155-162,共8页Highway

摘　　要：随着经济和交通的快速发展,钢混组合梁和钢结构盖梁得到越来越多地应用。以某高架桥分期实施为背景,对比分析了3种实施方案的优缺点,最终选择结构安全美观、施工方便快捷的组合梁十钢盖梁方案。通过建立钢盖梁整体和细部有限元模型,对钢盖梁在主要荷载工况下的受力性能进行了分析研究。研究结果表明,拼宽后钢盖梁最终运营状态下正应力富余27%、剪应力富余48%,有较高的安全储备;构件的最大vonMises应力分别出现在上部荷载作用区域及墩梁固接区域,且均小于钢材的屈服强度;需加强钢盖梁关键部位的构造设计,以确保板件材料性能得到充分发挥。With the rapid development of economy and transportation,steel-concrete composite beams and steel cap beams are increasingly used.In this paper,by comparing the advantages and disadvantages of three implementation plans based on the viaduct phased implementation,the steel-concrete composite beam plus steel cap beam plan is finally selected,which is reliable and beautiful in structure and convenient and fast in construction.The structural performance of the steel cap beam under basic load conditions are analyzed and studied by establishing a finite element model of the steel cap beam as a whole and in detail.The results show that the steel cap beam after widening has a positive stress margin of 27%and a shear stress margin of 48%under the final operating condition,which has a high safety reserve.The maximum von Mises stress of the component occurs in the upper load-bearing area and the fixed area of the pier and beam,both of which are less than the yield strength of steel.The structural design of key parts of the steel cap beam needs to be strengthened to ensure that the material properties of the plate are fully utilized.

关 键 词：桥梁工程 高架桥分期实施 钢结构盖梁 受力性能 安全储备 vonMises应力 

分 类 号：U448.216[建筑科学—桥梁与隧道工程] U441.5[交通运输工程—道路与铁道工程]