预应力碳纤维布加固钢筋混凝土T形梁的试验研究  

EXPERIMENTAL STUDY ON REINFORCED CONCRETE T-BEAMS STRENGTHENED WITH PRESTRESSED CFRP SHEETS

作　　者：叶列平[1] 庄江波[1] 曾攀 周小蓉 沙吾列提.拜开依 杨勇新 

机构地区：[1]清华大学土木工程系,北京100084 [2]广州市中心区交通项目办公室,广州510030 [3]清大华学工程结构诊治中心,北京100084

出　　处：《工业建筑》2005年第8期7-12,共6页Industrial Construction

基　　金：广州市中心区交通项目技术援助子项科研项目(编号:GTCC200216)资助

摘　　要：采用自行研发的碳纤维布预应力张拉设备,模拟实际工程情况,通过7根预应力碳纤维布受弯加固梁的受力性能试验研究,比较分析了不同加固量、预应力度、配筋率、二次受力等因素对试验梁受力性能的影响。试验梁为7m跨度的大尺寸T形混凝土梁和预应力混凝土梁。试验研究表明,采用预应力碳纤维布加固可以有效提高混凝土梁的承载力,减小梁的挠度和裂缝宽度,所研发的预应力碳纤维布加固技术可用于实际工程。Seven 7m long reinforced concrete T-beams strengthened with prestressed CFRP sheets are tested under the simulated actual working conditions. The equipment for prestessing CFRP sheets is developed and designed also. Several parameters, including the amount of strengthening C FRP sheets, the prestressing degree, the reinforcement ratio, two-stage load and the strengthened beam with or without prestressed tendon, are studied in the test program. The moment-curvature curves of the tested beams which are acquired with a beam simulating numerical program are corresponded with the test resluts well. The prestressed CFRP sheets strengthening can increase the load capacity and decrease the deflection and the width of crack. The practicability of the technique of the prestressed CFRP sheets strengthening is proved.

关 键 词：预应力 碳纤维布 混凝土T形梁 挠度 裂缝 预应力张拉设备 碳纤维布加固 试验研究 T形梁 钢筋混凝土 

分 类 号：TU378.2[建筑科学—结构工程]