无粘结预应力CFRP筋混凝土梁短期刚度研究  

Short-term stiffness studies of concrete beams prestressed with unbonded CFRP tendons

作　　者：薛辉[1] 

机构地区：[1]黑龙江八一农垦大学工程学院,黑龙江大庆163319

出　　处：《人民长江》2011年第1期80-82,86,共4页Yangtze River

摘　　要：以CFRP筋作无粘结预应力筋同时配置一定数量的非预应力钢筋,设计制作了4根无粘结预应力CFRP筋混凝土简支梁,通过静载试验考察该类构件的受弯性能。在对试验数据进行分析的基础上,根据实测荷载-挠度曲线并结合基于双折直线理论的刚度计算模式,提出了适合无粘结预应力CFRP筋混凝梁的短期刚度计算公式。We designed 4 unbonded prestressed CFRP（Carbon Fiber Reinforced Plastics） reinforced concrete simple beams,which were reinforced with CFRP unbonded tendons and a certain number of non-prestressing tendons.The flexural performance of this kind of beams was investigated by static load test.Based on analysis of test data,according to the measured load-deflection curve and combining with the stiffness calculating mode on the basis of double fold line theory,we presented the calculating formula of short-term stiffness for concrete beams prestressed with unbonded CFRP tendons.

关 键 词：无粘结预应力 CFRP筋 混凝土梁 短期刚度 

分 类 号：TU378.2[建筑科学—结构工程]