粘贴预应力GFRP板—混凝土梁抗剪加固试验研究  

Experimental study of shear repair for reinforced concrete beams with prestressed GFRP plate bonding

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,湖南长沙410075 [2]河南理工大学,河南焦作454000

出　　处：《四川建筑科学研究》2005年第5期46-49,共4页Sichuan Building Science

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

摘　　要：先通过预张玻璃钢板(Glass-Fibre-Reinforced-Polymer,简称GFRP)粘贴于混凝土梁受拉面,后在梁侧面用GFRP板进行剪切补强试验;分析了不同侧面贴GFRP方式对加固梁抗剪性能和破坏模式的影响,比较了各试验梁的跨中挠度、力筋和GFRP板应变的关系。试验结果表明,侧面贴GFRP可有效抑制斜裂缝的出现,提高试验梁的抗剪能力,改变其破坏形态,加固效果比较理想。After prestressed Glass-Fibre-Reinforced-Polymer （GFRP） plates were bonded on the tension face of RC beams, two distributing kinds of GFRP plates were bonded on the sides of the beams to improve shear capacity of RC beams. The pretress technology was described before results obtained during the application and release of the prestress, and subsequently four bending monotonic testing to failure was presented. Experimental data on strength, steel strain, GFRP strain, deflection, failure modes, and crack modes of beams were obtained, and comparisons between the different shear repair schemes and the unrepaired control beams are made. Experimental results indicate that GFRP bonded on the sides can restrict the propagation of shear crack, and failure mode is changed.

关 键 词：结构工程 混凝土梁 玻璃钢板 预应力 剪切加固 

分 类 号：TU375.1[建筑科学—结构工程]