| 于峰,徐国士,程安春,黎德光.PVC-FRP管混凝土柱组合抗压刚度理论分析[J].计算力学学报,2015,32(1):107~112 |
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| PVC-FRP管混凝土柱组合抗压刚度理论分析 |
| Theoretical analysis on the composite compressive stiffness for PVC-FRP confined concrete column |
| 投稿时间：2014-01-04 修订日期：2014-02-20 |
| DOI：10.7511/jslx201501018 |
| 中文关键词: PVC-FRP管混凝土柱 组合抗压刚度 变分原理 套箍系数 体积含纤维率 泊松比 |
| 英文关键词:PVC-FRP confined concrete column composite compressive stiffness variation principle hooping mechanism coefficient volume-fiber ratio Poisson's ratio |
| 基金项目:国家自然科学基金(51278403,51008001);安徽省自然科学基金(1208085QE88);住房和城乡建设部科学技术(K4201222)资助项目. |
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| 中文摘要: |
| 为研究PVC-FRP管混凝土柱的组合抗压刚度,应用弹性力学中的位移变分原理,对PVC-FRP管混凝土柱进行小变形下的弹性理论分析.考虑PVC-FRP管和核心混凝土径向位移和纵向应变协调,分别推导出PVC-FRP管和核心混凝土的抗压刚度以及PVC-FRP管对核心混凝土套箍系数的理论计算公式.在此基础上,建立PVC-FRP管混凝土柱组合抗压刚度计算理论.分析CFRP条带体积含纤维率,混凝土泊松比以及混凝土强度等级等因素对PVC-FRP管混凝土柱组合抗压刚度的影响规律.理论计算结果与试验值吻合较好. |
| 英文摘要: |
| To study the composite compressive stiffness of PVC-FRP confined concrete column,by means of the displacement variation principle of elasticity,the elasticity theory analysis of infinitesimal deformation was performed for PVC-FRP confined reinforced concrete column.Based on the compatibility of radial displacement and longitudinal strain,theoretic formulas of the compressive stiffness of PVC-FRP tube and core concrete,the hooping mechanism coefficient of PVC-FRP tube to core concrete were gained.The composite compressive stiffness calculation theory of PVC-FRP confined concrete column was derived on this basis.The influence law of the CFRP strips volume-fiber ratio,core concrete Poisson's ratio and concrete strength on the composite compressive stiffness were discussed.The calculated values of the proposed formula agree well with the experimental results. |
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