道路工程钢筋混凝土圆管涵实际工况下受力特征的三维有限元分析  

Three-dimensional Finite Element Analysis on Stress Characteristics of Circular Reinforced Concrete Pipe Culvert under Actual Working Condition in Road Engineering

作　　者：朱彬[1] 曹高尚[1] 

机构地区：[1]天津市市政工程设计研究院,天津市300051

出　　处：《城市道桥与防洪》2013年第9期165-168,15,共4页Urban Roads Bridges & Flood Control

摘　　要：建立内径为1.5m的钢筋混凝土圆管涵三维有限元模型,分析其在车辆荷载作用下内圈钢筋、外圈钢筋、混凝土内壁、混凝土外壁四处位置的主应力分布。得到的主要结论如下:(1)管涵顶部内圈钢筋、混凝土内壁受拉,外圈钢筋、混凝土外壁受压,随着位置下移,拉压应力转换;(2)外圈钢筋及涵洞外壁在底部约束开始处出现压胀形突变;(3)圆管涵临界受荷截面位置位于涵洞顶部。Three-dimensional finite element model of circular reinforced concrete pipe culvert with inner diameter 1.5m is established. The main stress distribution is analyzed at four positions of the inner ring reinforcing bar, outer ring reinforcing bar, inner wall of steel reinforced concrete and outer wall of steel reinforced concrete. The main conclusions are:(1) the inner ring reinforcing bar and the inner wall of steel reinforced concrete at the top of the inner pipe culvert are tensioned, the outer ring reinforcing bar and the outer wall of steel reinforced concrete are pressured, and with the position down, the tensile and compressive stress converts;(2) the outer ring reinforcing bar and the outer wall of culvert show the compressional expansion at the beginning of the bottom constraint;(3) the critical load section is located at the top of circular pipe culvert.

关 键 词：道路工程 钢筋混凝土圆管涵 三维有限元 受力特征 

分 类 号：U416.217[交通运输工程—道路与铁道工程]