【作者】 刘明学； 关建光； 徐福泉；

【Author】 LIU Mingxue ,GUAN Jianguang ,XU Fuquan( Civil Engineering School of Tianjin University, Tianjing 300072; China Academy of Building Research,Beijing 100013)

【机构】 天津大学建筑工程学院； 中国建筑科学研究院；

【摘要】 通过9个尺寸为100mm×100mm×300mm(长×宽×高)碳纤维布横向缠绕加固混凝土方柱和3个同条件的索混凝土方柱的一次受压应力-应变关系试验,对比研究了纤维特征值和初始轴压力对混凝土方柱强度和延性的影响。试验研究表明,横向缠绕可以显著提高混凝土方柱的强度和变形;初始轴压应力小于0.3fc时,碳纤维布的加固效果没有明显降低。在试验结果的基础上,并结合国内碳纤维布约束混凝土方柱的研究成果,提出一个改进的碳纤维布约束混凝土方柱的应力-应变曲线方程。更多还原

【Abstract】 Based on the experiments of nine Carbon Fiber Reinforced Polymer (CFRP) sheet confined and three reference plain concrete square columns, with the dimensions of 100mm×100mm × 300mm, under axial compression load, the influence of carbon fiber characteristic - value and initial axial force on the behavior of CFRP sheet confined concrete is investigated. Experimental results indicate that CFRP sheet can strengthen the strength and ductility of concrete evidently, and if the initial axial stress is less than or equal to 0. 3fc, difference between with and without it isn’t too much. Based on the experiment, an improved stress -strain curve of square columns is proposed.更多还原