T形柱中约束混凝土的应力应变模型 |
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引用本文: | 孙林柱,王铁成,王晓伟,张晓光.T形柱中约束混凝土的应力应变模型[J].天津大学学报(自然科学与工程技术版),2009,42(8):661-665. |
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作者姓名: | 孙林柱 王铁成 王晓伟 张晓光 |
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作者单位: | 孙林柱(天津大学建筑工程学院,天津,300072;温州大学建筑与土木工程学院,温州,325035);王铁成,王晓伟,张晓光(天津大学建筑工程学院,天津,300072) |
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基金项目: | 国家标准项目资助,浙江省自然科学基金资助项目 |
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摘 要: | 为建立T形柱约束混凝土的应力应变全曲线方程,根据T形柱配箍特征值的使用范围,设计了13个试件通过轴心受压试验,得到钢筋混凝土T形柱的试验结果.采用灰色优化和数据变换理论,建立了T形柱中约束混凝土应力应变模型.对测试数据选行统计分析,得到了模型的系统参数该模型反映了T形柱中约束混凝土应力应变曲线的变化规律.与方形柱的约束混凝土应力应变模型相比,T形柱中约来混凝土峰值应力较小,峰值应变较大,下降段曲线相对较陡.研究结果为T形柱的非线性分析提供了理论依据。
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关 键 词: | T形柱 约束混凝土 灰色优化理论 数据变换 应力应变模型 |
Stress-Strain Model of Confined Concrete in T-Shaped Columns |
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Institution: | SUN Lin-zhu, WANG Tie-cheng, WANG Xiao-wei, ZHANG Xiao-guang (1. School of Civil Engineering ,Tianjin University ,Tianjin 300072 ,China; 2. School of Architecture and Civil Engineering ,Wenzhou University ,Wenzhou 325035 ,China) |
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Abstract: | To develop a stress-strain relationship model of confined concrete in T-shaped columns, 13 specimens were designed according to the application range of volume reinforcement characteristic and the experiments were carried out. Based on the stress-strain curves for confined concrete picked up in the axial compression experiments ,the gray optimization and data transformation were employed to establish a stress-strain model. The system parameters of the model were obtained by analyzing the test data statistically,which reflected the changing regularity for stress-strain curves of the confined concrete. The results show that,compared with the stress-strain model for the confined concrete in square-section columns ,the peak stress is smaller in T-shaped columns,while the peak strain is larger and the descending curve is relatively steeper. The findings provide theoretical basis for the nonlinear analysis of T-shaped columns. |
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Keywords: | T-shaped column confined concrete gray optimization theory data transmission stress-strain model |
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