摘要
在总结现有钢管混凝土本构关系分析的基础上,将钢管混凝土简化为同一尺度的横观各向同性体来研究,并在弹性条件下利用应变能相等原理得到了宏观弹性系数,同时根据试验结果假设进入弹塑性阶段后各模量为二次抛物线变化,建立了钢管混凝土这种组合结构新的等效本构关系.并结合具体算例研究了弹性条件下材料强度变化和含钢率对各模量的影响,同时与前人的研究结果进行了比较,结果表明,该本构关系具有理论依据明确,参数易确定,能很好地反映组合构件材料物理性能的优点,为钢管混凝土结构进一步进行数值分析奠定了基础.
Results obtained from previous related researches were used to study the constitutive relationship of concrete filled steel tube (CFST) by simplifying CFST as a kind of composite material. An analytical model for the constitutive relationship of CFST is proposed, which takes into account the strain energy principle and whose basic assumptions based well in theory and easy for parameter determination. Examples were used to validate the analytical model and determine the effects of changing strength of the materials and steel ratio on the elastic coefficients. The results obtained from this work were compared with the calculated data reported by other researchers. Good agreement was observed between the values using the proposed model and the calculated results, ft was shown that the proposed model can accurately simulate the physical properties of the composite structure and can be used for further integral analysis of CCFT.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2004年第8期984-988,共5页
Journal of Zhejiang University：Engineering Science
关键词
钢管混凝土
本构关系
应变能
Composite structures
Concretes
Elastic moduli
Plasticity
Steel
Strain
