（1 海南大学土木建筑工程学院， 海口 570228； 2 海南国际旅游岛发展研究院， 海口 570228； 3 浙江省建筑设计研究院， 杭州 310006； 4 海南工商职业学院建筑工程系， 海口 570203）

［摘要］ABAUQS软件内嵌的损伤塑性模型已较多地被应用于混凝土结构有限元分析，但采用其对箍筋约束混凝土进行模拟的研究很少。研究了混凝土单轴受压应力-应变关系对损伤塑性模型模拟箍筋约束混凝土力学性能的影响。通过在损伤塑性模型中引入三种不同的混凝土单轴受压应力-应变关系曲线定义其受压行为，建立箍筋约束混凝土柱的三维非线性有限元模型。有限元分析结果与试验结果对比分析表明，在损伤塑性模型中采用合适的单轴受压应力-应变关系对模拟结果的准确度非常重要，并且应用本文建议的单轴受压应力-应变关系曲线对约束混凝土进行模拟具有较好效果。

［关键词］箍筋约束混凝土； 箍筋约束效应； 损伤塑性模型； 单轴受压应力-应变关系； 有限元建模

中图分类号：TU375文献标识码：A文章编号：1002-848X(2017)06-0060-05

Investigation on finite element modeling of stirrup-confined concrete based on damaged plasticity model

Zeng Xiang1, 2， Ren Xiaohu3， Zou Juan4

(1 College of Civil Engineering and Architecture, Hainan University, Haikou 570228, China; 2 Hainan Institute of Development on International Tourist Destination, Haikou 570228, China; 3 Zhejiang Province Institute of Architectural Design and Research,  Hangzhou 310006, China; 4 Department of Architecture and Civil Engineering, Hainan Technology and Business College, Haikou 570203, China)

Abstract:Damaged plasticity (DP) model embedded in ABAQUS software has been used widely in the finite element (FE) analysis of reinforced concrete (RC) structures, but few studies were conducted to use the material model for the FE analysis of stirrup-confined concrete. The influence of uniaxial concrete compression stress-strain relation on the simulation results of the mechanical behavior of stirrup-confined concrete using DP model was studied. Three types of uniaxial concrete compression strain-stress relation curve  for the definitions of compression behaviors of concrete were introduced in DP model to establish the corresponding three-dimensional nonlinear FE models of RC columns with the confinement effect of stirrups. Through comparison between the FE simulation and test results, it is concluded that it′s important for accuracy of simulating results that proper uniaxial compression stress-strain relation is adopted in the DP model, and it has good results if the proposed uniaxial concrete compression stress-strain relation curve is adopted in simulation of the confined concrete. 

Keywords:stirrup\|confined concrete； confinement effect of stirrup； damaged plasticity model； uniaxial compression stress-strain relation； finite element modeling

*国家自然科学基金项目（51608156）,海南省自然科学基金面上项目（20165208）,海南大学科研启动基金资助项目（kyqd1534）。

作者简介：曾翔，博士，讲师，Email: zeng_t08@163.com。