玻璃纤维聚合物加固砼偏心受压柱力学性能研究

现有的外贴纤维布加固柱的试验研究和理论分析大都针对轴心受压柱,对采用这种方法加固混凝土偏心受压柱的试验研究和理论分析都很少。但实际工程中的柱大多是偏心受压柱,需要对其采用外贴纤维布加固后的力学性能进行进一步的研究。考虑了偏心率、加固量、粘贴形式以及加载历史等因素的影响,对外粘单向连续玻璃纤维布加固后的10根足尺钢筋混凝土矩形柱进行了试验研究。在此基础上,提出了相应的分析方法和计算公式,试验结果与计算值基本吻合。

INVESTIGATION OF MECHANICAL BEHAVIOR OF RC COLUMNS STRENGTHENED WITH GLASS FIBER-REINFORCED POLYMER UNDER ECCENTRIC LOADING

Almost all current experimental studies and theoretical analyses have been focused on concrete columns subjected to axial loading, but the study of concrete columns under eccentric loading is scarce. In engineering practice, however, almost all columns are subjected to eccentric loading. It is therefore essential to study the behavior of fiber-reinforced polymer-jacketed reinforced concrete columns under eccentric loading. Experiments on 10 full size rectangular reinforced concrete columns strengthened with glass fiber-reinforced polymer are conducted. Various design parameters, such as eccentricity ratio, quantity of unidirection continuous fiber sheets, space of straps and loading history, are considered. Based on the test results, an analysis method is proposed and good agreement between test and theoretical results is achieved.