外贴预应力GFRP板加固混凝土梁抗弯试验研究  

Tests of flexural behavior of RC beams strengthened by bonding prestressed GFRP plates

作　　者：王兴国[1] 周朝阳[1] 曾宪桃[2] 丁亚红[2] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075 [2]河南理工大学土木建筑工程系,河南焦作454000

出　　处：《哈尔滨工业大学学报》2005年第3期351-354,共4页Journal of Harbin Institute of Technology

基　　金：河南省自然科学基金资助项目(004041700);铁道部科技计划资助项目(02G043)

摘　　要：通过预张玻璃纤维增强塑料GFRP(Glass Fiber Reinforced Polymer)板粘贴加固钢筋混凝土梁试验, 研究了不同预应力水平和混凝土强度等级对加固梁受弯性能的影响,并对试验梁的极限承载力、截面应变、跨中挠度和刚度等进行了讨论.试验结果表明,预应力粘贴法可以提高GFRP板的强度利用率和梁的受弯承载力,且试验梁混凝土强度较高时加固效果更为明显.Experimental study is carried out on reinforced concrete (RC) beams strengthened by bonding with prestressed plate of glass-fiber-reinforced-polymer (GFRP). Prestress levels and grades of concrete strength are varied in the test in order to reveal their effects on the bending behavior of strengthened beams. The ultimate strength, strain, midspan deflection and stiffness of the beams are discussed. The test results indicate that the strength usage of GFRP plates and ultimate strength are significantly increased for prestressed GFRP-plated beams, and the effect is improved for such strengthened beams with higher grade of concrete strength.

关 键 词：玻璃钢板 受弯承载力 补强加固 钢筋混凝土梁 预应力 

分 类 号：TU375.1[建筑科学—结构工程] TU746.3