摘要
首先通过四分之一圆片模型来模拟圆不锈钢管混凝土轴压短柱。在验证了建模可靠性的基础上,对Lam和Gardner的不锈钢管混凝土短柱轴压试验进行了模拟。计算结果表明有限元计算结果和试验结果总体上吻合良好。在此基础上,利用该有限元模型对采用不同径厚比、不同混凝土强度等级的圆不锈钢管混凝土的轴向应力-应变关系进行分析。结果表明:在保持相同混凝土强度等级的情况下,径厚比越小,不锈钢管对核心混凝土的约束效应越好,核心混凝土强度提高越大;在不锈钢管围压与核心混凝土强度比值保持不变的情况下,混凝土强度等级越高,延性越差。
A quarter slice finite element model was first proposed for concrete filled circular stainless steel tubular stubs.The validity of the finite element model was verified by comparison with existing test results.Good correlation was generally obtained between the finite element analysis results and test results.Adopting the verified finite element model,a parametric study was then conducted to investigate the effects of concrete strength and confinement ratio on the axial performance.Based on the parametric study,the strength and ductility of concrete core both increase with the decrease of the diameter-to-thickness ratio of stainless steel tube.When the ratio between confinement pressure and concrete strength is the same,the ductility of concrete core decreases with the increase of concrete strength.
出处
《混凝土》
CAS
北大核心
2017年第7期44-46,49,共4页
Concrete
基金
国家自然科学基金(51608392
51578423
51508415)
浙江省自然科学基金(LQ15E080006)
温州大学研究生创新基金(3162015051)
关键词
不锈钢管混凝土
轴压
有限元
应力-应变关系
荷载-位移关系
concrete filled stainless steel tube
axial compression
finite element
stress-strain relationship
load-deformation relationship
