碳纤维布约束混凝土应力_应变全曲线试验研究_赵彤.pdf

30 7 2000 7 * 赵 彤 谢 剑 戴自强 ( 300072) [ ] , : , , ;, , , [ ] Based on reasonably determining the tensile strength and modulus of elasticity for carbon fiber sheet ( FS) , the compressive stressstrain curve of concrete confined by FS is also studied experimentally and analytically.The test results indicate that the confinement of FS,w hich is similar to that of transverse reinforcement,can increase the ductility and compressive strength of concrete remarkably. It is also found that the confining effect of wrapping FS strips is better than that of w rapping FS fabric, w hen the quantity of FS is constant. Based on the test data analyses, the compressive stressstrain relationship of concrete confined by FS is proposed. The calculating curves agree well w ith the experimental curves. Keywords:carbon fiber sheet; stress; strain 2 , ( MPa) ( MPa) (M Pa) ( MPa) ,, 50~ 60 15~ 18 : 20 ( 5~ 6) 103 ( ) ( ) , , , 15mm350mm ,( , , ) , 15mm 15mm 6K ( : 6K 100mm, 6 000) , 1, 2 , , , , , 1mm, 6 K 1 13mm 1 , 3 *