FRP约束砌体方柱轴心抗压承载力计算分析  

The Calculation and Analysis of Axial Compressive Capacity of FRP Constraint Masonry Nonrectangular Columns

作　　者：张德海[1] 王涛[1] 刘新强[2] 郑强[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]辽宁省建设科学研究院,辽宁沈阳110005

出　　处：《沈阳建筑大学学报（自然科学版）》2011年第5期904-909,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家十一五科技支撑计划项目(2008BAJ08B11-03);辽宁省自然科学基金项目(20022005);沈阳市人才资源开发专项资金(2010140503024)

摘　　要：目的研究纤维增强复合材料(FRP)加固砌体结构的轴心抗压承载力的计算方法,为设计提供理论计算公式.方法参考FRP加固混凝土轴心抗压承载力的计算模型,考虑加固方式、含纤率等因素的影响,对现有试验数据进行回归分析,推导有效约束区极限抗压强度与侧向约束应力的关系表达式,并将计算结果与试验结果进行对比分析.结果利用笔者推导出的FRP约束砌体方柱轴心抗压承载力公式计算承载力,与试验结果吻合较好,计算值/试验值的平均值为0.96,均方差为0.001 644,变异系数为0.042.结论提出了FRP加固砌体方柱有效约束区极限抗压强度与侧向约束应力的关系表达式;推导出的FRP约束砌体柱极限抗压承载力的建议公式可供设计人员参考使用.To study the calculation methods of axis compressive bearing capacity of masonry structures rein- forced with the fiber - reinforced composite materials （FRP） for the purpose of providing a theoretical formu- la for design, based on the calculation model of axis compressive bearing capacity of concrete reinforced with FRP and consider the factors of the reinforcement approach, fiber ratio and then analyze the existing experi- mental data, we deduce the relationship expression formula of ultimate compressive strength and the lateral restraint stress limit in effective binding region. Calculated results were compared with experimental results. The calculation values of compressive bearing capacity derived out of the formula is in good agreement with experimental results, the average of the calculated values/experimental values is 0. 96, standard deviation is 0. 001 644 ,and the coefficient of variation is 0. 042. We put forward the elationship expression formula of ultimate compressive strength and the lateral restraint stress limit in effective binding region and conclude that the calculation formula of the ultimate bearing capacity of masonry column confined with FRP can offer reference for designers.

关 键 词：FRP 砌体柱 承载力 侧向应力 

分 类 号：TU362[建筑科学—结构工程]