空腹式石拱桥承载能力静载试验与有限元分析  

Static Load Test and Finite Element Analysis on Loading Capacity of Fasting Stone Arch Bridge

作　　者：李围[1] 李贵平[1] 

机构地区：[1]贵州大学土木建筑工程学院,贵州贵阳550003

出　　处：《贵州工业大学学报（自然科学版）》2008年第2期81-84,共4页Journal of Guizhou University of Technology(Natural Science Edition)

基　　金：贵州大学博士基金(X065002)

摘　　要：在改造要求条件下,就某空腹式石拱桥的承载能力进行了现场静载试验与有限元数值模拟分析。结果表明,主拱圈的挠度和残余变形量小、最大压应力和拉应力也小,均满足承载能力和正常使用极性状态的要求。但拱座的水平位移不能恢复,这将会导致整个主拱圈承载能力下降,甚至引起主拱圈跨塌现象,故建议对该桥拱座基础进行加固处理、并保证加固效果,或采取重新修建桥梁的方案,以便保证桥梁改造后能满足使用要求。Under transformation conditions, the static load test on the loading capacity of a fasting stone arch bridge was implemented, whose mechanical behaviors were analyzed with Finite Element Method （FEM）. The results show that the deflection and residual deformation of main arch structure are small, whose maximums of tensile stress and pressure stress also are small. So ,limit states of the loading capacity and normal use are satisfied for the main arch structure. But, the horizontal displacement of the arch foot can not be resumed under loads, so the loading capacity of the main arch structure will decline, and the structure may collapse, reinforcing the basis of effect was proposed. But, it may adopt the bridge after transforming this bridge. the arch foot for this bridge to ensure the reinforcement re -construction scheme to satisfy operating requirements

关 键 词：石拱桥 空腹式 承载能力 静载试验 有限元 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]