| 摘要: |
| 在轴心受压试验数据的基础上，分析了约束混凝土体积配箍率、箍筋屈服强度和素混凝土抗压强度对箍筋约束混凝土受压性能的影响，探讨了直接应用配箍特征值建立箍筋约束混凝土本构关系存在的问题，建立了箍筋约束混凝土峰值应力、峰值应变和极限应变的计算公式.归纳分析了以往典型箍筋约束混凝土本构关系模型的合理性和缺陷，提出了简化的箍筋约束混凝土本构关系模型，并和高强箍筋约束混凝土试验应力应变曲线进行对比.对比结果表明，所建立的本构关系模型能较好拟合高强箍筋约束混凝土试验应力应变曲线. |
| 关键词: 混凝土 高强箍筋 配箍特征值 本构关系模型 强度 受压性能 |
| DOI：103969/j.issn1007 9629201402006 |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51178380，50978215)；教育部高等学校博士学科点专项科研基金资助项目(20116012011004) |
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| A Practical Stress Strain Model for High Strength Stirrups Confined Concrete |
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SHI Qingxuan1, WANG Nan1, TIAN Jianbo1, SHI Jialiang2
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1.School of Civil Engineering, Xian University of Architecture and Technology, Xian 710055, China;2.Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China
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| Abstract: |
| Based on axial compression test results, the effects of volumetric ratio of stirrup, stirrup yield strength and ordinary concrete compressive strength on the compressive behavior of stirrup confined concrete were analyzed. The issue of using confining reinforcement characteristic values to suggest stress strain model directly was discussed, the equations for calculating the peak stress, peak strain and the ultimate strain were proposed. A simplified stress strain model was developed after summarizing and analyzing the rationality and fault of former typical model. Comparison between calculated results and experimental curves reveals that the proposed analytical model could well predict stress strain curves of high strength stirrup confined concretes. |
| Key words: concrete high strength stirrup confining reinforcement characteristic value stress strain model strength compressive property |
