CFRP加筋混凝土梁的力学性能试验与分析

MECHANICAL BEHAVIOR OF CONCRETE BEAMS REINFORCED WITH CFRP BARS

采用两种CFRP筋(表面形式分别为螺旋缠绕纤维束和粘砂两种),分别制作两组各3根2.1m长的简支CFRP加筋混凝土梁并进行三分点静力加载直到破坏的试验和分析。试验研究CFRP加筋混凝土梁在各级荷载作用下的开裂形式、破坏形式、极限承载力及荷载-变形特性。提出CFRP加筋混凝土梁的变形、极限承载力的计算公式,计算值与试验值吻合较好。

Presents test results on the flexural behavior of concrete beams reinforced with CFRP bars with helically winding glass fiber strands and coating with cohesive sand particles. The flexural behavior is studied by testing six simply supported CFRP reinforced beams to failure under third-point loading. The beams are tested under static loading to investigate the cracking behavior at low, moderate and high loading levels. The cracking patterns, modes of failure, load carrying capacities and load-deflection responses are evaluated in flexural tests. Based on this study, theoretical models for prediction of the deflection and the ultimate load-carrying capacity are proposed, the theoretical results agree well with the test results.