钢板和钢箱加固简支T梁的有限元分析  

Finite Element Analysis of Simply-supported T Beam Reinforced with Steel Plate and Steel Box

作　　者：李小雪[1] 蔺鹏臻[1] 

机构地区：[1]兰州交通大学,甘肃省道路桥梁与地下工程重点实验室,甘肃兰州730070

出　　处：《工程抗震与加固改造》2015年第3期61-65,共5页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金(51168030,51208242,51368031);甘肃省杰出青年基金(1210RJDA009);中国博士后科学基金(2012M521815);教育部“长江学者和创新团队发展计划”(IRT1139)资助

摘　　要：通过在T梁梁肋的底部粘贴钢板或钢箱,可有效提高T梁的承载能力和刚度。本文以某公路立交桥为工程背景,遵循用钢量不变的等面积原则,建立两种加固方案的有限元分析模型。在典型设计荷载组合工况下,对加固前后T梁的应力和变形进行对比分析。结果表明,在用钢量相同的情况下,与钢板加固相比钢箱加固方案的梁体挠度、梁体应力均较小,证明钢箱加固对提高梁体的承载力和刚度效果优于钢板加固方案。Bonding steel plate or steel box at the bottom of the T beam can effectively improve the load capacity and stiffness. Based on the background of a highway overpass construction, following the principles of the amount of steel the same area, two models are established for finite element analysis of reinforcement scheme. Under typical design load combinations, the stress and deformation of the T beams are calculated before and after reinforcement. The results show that, under the condition of same steel consumption, the scheme of steel box reinforcement has less deflection and stress than steel plate. The steel box reinforcement is more effective to improving the bearing capacity and stiffness of the T beams.

关 键 词：T梁 钢箱加固 钢板加固 应力 有限元 

分 类 号：U441[建筑科学—桥梁与隧道工程] U445.72[交通运输工程—道路与铁道工程]