圆钢管轻骨料混凝土轴压柱非线性有限元分析  

Nonlinear Finite Element Analysis of Axially Loaded Lightweight Aggregate Concrete Filled Circular Steel Tubular Columns

作　　者：雷崇[1] 丁发兴[2] 

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063 [2]中南大学,长沙410075

出　　处：《铁道工程学报》2011年第6期68-71,共4页Journal of Railway Engineering Society

摘　　要：研究目的:为实现对圆钢管轻骨料混凝土轴压柱的荷载-变形曲线非线性有限元分析,本文采用ABAQUS有限元软件建立圆钢管轻骨料混凝土轴压柱有限元模型,对典型的钢管轻骨料混凝土轴压中长柱的荷载-变形曲线进行分析。研究结论:(1)核心混凝土由于受到钢管的约束其纵向应力有较大提高,延性得到了显著的改善,钢管为轻骨料混凝土提供径向约束的同时纵向应力大幅降低,内力由钢管转向核心混凝土承担的力学特性;(2)钢管对轻骨料混凝土的约束效果要差于对普通混凝土的约束效果。Research purposes：In order to analyze the behavior of axially loaded lightweight aggregate concrete filled circular steel tubular（LCFST） columns,ABAQUS was used to establish the finite element model.The load-axial strain behavior of typical LCFST columns was analyzed. Research conclusions：（1）For confined by steel tube,the axial stress of lightweight aggregate concrete core increased greatly and the ductility was improved.At the same time,the axial stress of steel tube decreased rapidly for confinement effect.（2）Compared with normal concrete filled circular steel tubular（CFST） stub columns,the confinement effect of LCFST stub columns was weakened.

关 键 词：钢管轻骨料混凝土 有限元法 本构模型 

分 类 号：TU398[建筑科学—结构工程]