摘要
对6根玻璃纤维布加固混凝土柱和1根对比试验柱作受压试验.分析玻璃纤维布的受压加固机理及影响玻璃纤维布受压加固效果的因素,证明玻璃纤维布加固有助于钢筋混凝土柱受压承载力的提高.引入玻璃纤维布非有效约束区、有效约束区面积An、Ae,纤维布体积加固率μfx、μfy等参数来考虑加固参数对加固柱加固效果的影响,提出玻璃纤维布加固钢筋混凝土方柱在轴心受压作用下的计算模型,给出GFRP约束混凝土极限抗压强度fcc的确定方法和玻璃纤维布加固钢筋混凝土方柱的承载力计算公式.公式计算结果与试验结果吻合较好.
Six square glassfiber reinforced concrete columns under axial compression were tested together with a reference column for investigation of their compressive bearing capacity by means of comparison. The mechanism of compressive reinforcement due to glassfiber sheet and the factors influencing the reinforcement result were analyzed, so that it was verified that the glassfiber sheet was useful for improving the bearing capacity of compressive columns. Some parameters such as the area of ineffective confined region An, the area of effective confined region Ae, and the volumetric reinforcement rates μfx and μfy were introduced for the sake of considering the influence of these parameters on the reinforcement result of the columns, a calculation model of square compressive concrete column reinforced with glassfiber was further proposed, and a determination method of limit compressive strength fcc of GFRP confined concrete and a calculation formula of bearing capacity for axially compresed square concrete columns reinforced with glassfiber sheet were given, also. The result of calculation with this formula agreed well with that of experiment.
出处
《兰州理工大学学报》
CAS
北大核心
2007年第6期111-114,共4页
Journal of Lanzhou University of Technology
基金
陕西理工学院科研基金项目(SLG0634)的资助
关键词
钢筋混凝土方柱
轴压
玻璃纤维布
加固
square reinforced concrete column
axial compression
glassfiber sheet
reinforcement
