FRP布环向约束矩形钢筋混凝土偏压柱的简化N_u-M_u曲线研究  

Study on simplified N_u-M_u interaction curve for FRP jacketed rectangular reinforced concrete columns under eccentric loading

作　　者：李贤[1] 沙士钰[1] 吕恒林[1] 周淑春[1] 

机构地区：[1]中国矿业大学土木工程环境灾变与结构可靠性江苏省重点试验室,徐州221116

出　　处：《建筑结构》2013年第12期47-51,共5页Building Structure

基　　金：国家自然科学基金(51008300);江苏省自然科学基金(BK2010185)

摘　　要：建议了FRP(纤维增强塑料)布环向约束钢筋混凝土偏心受压柱的简化轴力-弯矩相关曲线(Nu-Mu曲线)的建立方法,参照《混凝土结构设计规范》(GB 50010—2010)的正截面承载力计算基本假定,得到了简化Nu-Mu曲线的关键控制点,并通过相关试验结果验证了采用简化Nu-Mu曲线验算FRP布环向约束钢筋混凝土偏心受压柱承载力的合理性,并给出了利用简化Nu-Mu曲线进行FRP布环向约束加固钢筋混凝土偏心受压柱的设计流程以及设计建议。研究结果表明,通过该简化曲线可以较好地计算FRP布环向约束钢筋混凝土偏心受压柱的承载力,且计算过程简单,能够满足工程结构加固设计要求,为我国相关规范的修订提供有益参考。The purpose of this study is to propose a new method for the construction of a simplified axial force-bending moment interaction curve（Nu-Mu interaction curve） for fiber reinforced polymer（FRP） jacketed reinforced concrete columns under eccentric loading.Based on the assumptions recommended by Code for design of concrete structures（GB 50010—2010） for calculating flexural strength of conventional reinforced concrete members,the key points to determine the simplified curve were obtained and then the accuracy of the proposed curve was verified by examining correlations with the experimental results found in literatures.The calculation procedure and some recommendations for structural strengthening were also suggested.Analytical results indicate that the proposed curve can accurately and effectively predict the loading capacity of FRP jacketed reinforced concrete columns,and thus it can be applied in engineering practice and revision of future codes in related field.

关 键 词：钢筋混凝土柱 纤维增强塑料 承载力 偏心荷载 加固设计 

分 类 号：TU318.1[建筑科学—结构工程]