不同混凝土本构关系在钢管UHPC结构中的应用研究  

Research on Application of Constitutive Relations of Different Concrete in Structure of UHPC Steel Tube

作　　者：周俊 ZHOU Jun(College of Civil Engineering,Fujian Chuanzheng Communications College,Fuzhou Fujian 350007,China)

机构地区：[1]福建船政交通职业学院土木工程学院,福建福州350007

出　　处：《长春工程学院学报（自然科学版）》2023年第1期34-38,共5页Journal of Changchun Institute of Technology：Natural Sciences Edition

基　　金：福建省中青年教师教育科研项目(科技类)(JAT210707)。

摘　　要：为了研究不同混凝土本构模型在钢管UHPC结构数值分析中的应用情况,分别采用韩林海约束混凝土本构模型、Saenz本构模型和闫光杰UHPC单轴本构模型对钢管UHPC轴压短柱进行数值分析,并与试验结果进行对比。结果表明:应用3个本构模型模拟得到的钢管UHPC短柱破坏形态与试验结果一致;采用韩林海约束混凝土本构模型计算得到的承载力结果与试验结果相比误差最小;对比分析荷载—位移曲线看出,通过3个模型计算得到的弹性段与试验结果相差不大,而弹塑性阶段和下降段则相差较大,且屈服承载力数与采用韩林海本构模型的结果最为接近,3个模型都不能很好地模拟曲线下降段。这些结果可为钢管UHPC结构的研究提供有限元分析参考。In order to study the application of different concrete constitutive models in the numerical analysis on structures of UHPC steel tube,the constrained concrete constitutive model of Han Linhai,constitutive model of Saenz and UHPC uniaxial constitutive model of Yan Guangjie are respectively used for numerical analysis on short columns of UHPC steel tube under the axial compression,which is compared with the experimental results.The results show that the failure morphology of short columns of UHPC steel tube simulated by three constitutive models is consistent with the experimental results,and the bearing capacity calculated by the constrained concrete constitutive model of Han Linhai has the minimum error compared with the experimental results.Comparing and analyzing the curve of load and displacement,it can be seen that the elastic section calculated by the three models has little difference from the experimental results,while the elastic-plastic stage and the descending section have significant differences.Moreover,the yield bearing capacity is closest to the results obtained by the constitutive model of Han Linhai,and none of the three models can simulate the descending section of the curve well.These results can provide references of analysis on finite element for the research on structures of UHPC steel tube.

关 键 词：钢管UHPC柱 本构关系 数值分析 

分 类 号：TU398[建筑科学—结构工程]