自应力钢管混凝土轴压短柱力学性能研究(点击标题下载全文) 已下载

作者:常旭蔺海晓黄承逵

作者单位:河南理工大学土木工程学院大连理工大学海岸与近海工程国家重点实验室

摘要:利用混凝土的边界面模型和钢材的弹塑性模型,建立了自应力钢管混凝土轴压短柱的三维有限元模型并分析了自应力钢管混凝土轴压短柱的力学性能,计算结果和试验结果吻合较好.计算结果表明,由于自应力的影响,自应力钢管混凝土轴压短柱的承载力要高于普通钢管混凝土短柱,并且承载力随着自应力的增加而增加;自应力的变化并不能改变轴压构件载荷—应变曲线的变化趋势;含钢率不但对轴压构件的承载力有重要影响,而且是影响载荷—变形曲线变化趋势的主要因素.

基金:国家自然科学基金资助项目(50578027);河南省重点学科项目(504906);

关键词:自应力;钢管混凝土;有限元;轴压短柱;承载力;

DOI:10.16186/j.cnki.1673-9787.2009.04.019

分类号:TU398.9

Abstract:Based on a bounding surface model of the concrete and elastic-plasticity constitutive relations of steel, the finite element model of the self-stressing concrete filled steel tube short column is established and the mechanical performance is analyzed.The calculated results is consistence with test results.The results indicate that the self-stressing concrete-filled steel tube short column has higher carrying capacity than common concrete-filled steel tube short column due to self-stress.The carrying capacity of self-stressing concrete-filled steel tube short column increases with increasing self-stress.Steel ratio of the specimen is the principal factor which affects the shape of the load-strain curve.

 
 
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