基于截面换算规则的FRP约束混凝土轴心抗压强度模型研究  

MODEL OF AXIAL COMPRESSIVE STRENGTH OF FRP CONFINED CONCRETE BASED ON RULE OF SECTIONAL CONVERSION

作　　者：朱天志[1] 孟德光[1] 姚素玲[1] 

机构地区：[1]河北科技师范学院土木建筑系,秦皇岛066004

出　　处：《工业建筑》2009年第S1期965-967,945,共4页Industrial Construction

摘　　要：FRP在结构补强方面已经得到了广泛的应用,有关FRP约束混凝土于圆形柱轴心抗压强度计算模型相对较为成熟。以FRP约束混凝土圆形柱应力模型的基础上,针对方柱、矩形柱截面与圆形截面的不同,对FRP约束矩形截面混凝土柱的轴心受压性能进行过程分析,基于截面面积和惯性矩相等的换算原则,提出了矩形截面转换为圆形柱的等效直径计算公式,引入了截面影响系数对极限强度进行了修正,构建了FRP约束钢筋混凝土矩形柱的极限强度模型,并应用已有的试验数据对模型的有效性和可行性进行检验,结果表明,模型计算结果与试验数据具有较好的吻合度和一致性,能够反映FRP约束混凝土矩形柱的真实特性,研究成果可作为工程实践的参考依据。It was analyzed the behavior of FRP confined rectangular concrete column under axial loads based on a stress model of FRP confined circular concrete column.Auording to the rule of section area being equal to inertia moment,a formula of equivalent diameter of changing a rectangular section into a circulor column section is proposed to set up a limit strength model of FRP confined RC rectangular column,whose feasibility is verified by the existing data.The result shows that the results by the model agre well with those of the tests.

关 键 词：纤维增强塑料 约束混凝土 混凝土矩形柱 抗压强度 

分 类 号：TU375.3[建筑科学—结构工程]