摘要
分离式箱形断面是钢桥中普遍采用的结构形式,应用于城市高架主线桥时,由于桥下地面道路通行和景观需求,往往会形成横向大悬臂结构,力学空间效应明显。以太原市卧虎山快速路建设工程中某两跨连续钢箱梁为例,利用Abaqus有限元工程模拟软件建立全桥三维板壳单元模型,分析其在典型荷载下的空间力学性能,包括剪力滞效应、活载偏载效应、支点横梁应力,并与单梁模型进行对比,为同类桥梁的设计和简化分析提供参考。
The separated box section is widely used in steel bridges. Owing to the ground road traffic and landscape demand under bridge, this structural style will often form the large horizontal cantilever structure when used for the urban viaduct, and its mechanical space effect is obvious. According to a two-span continuous steel box girder in Taiyuan Wohu Mountain Expressway Construction Project, the Abaqus finite element engineering simulation software is used to establish a three-dimensional shell element model of the whole bridge in order to analyze its space mechanical property under the typical load including the shearing lag effect, live load unbalance load effect and pivot crossbeam stress by the comparison with the single girder model, which can be referred for the design and simplified analysis of the similar bridges.
出处
《城市道桥与防洪》
2017年第6期84-86,共3页
Urban Roads Bridges & Flood Control
关键词
分离式
大悬臂
钢箱梁
空间效应
有限元
separated
large cantilever
steel box girder
space effect
finite element
