论文部分内容阅读
以CFRP层数为参数,对1根对比梁和2根CFRP约束受压区混凝土梁(CFRP约束梁)进行三分点加载试验,观察梁的破坏过程,得到混凝土和CFRP管应变分布、荷载-跨中位移曲线等数据,并对梁的延性性能予以分析。结果表明:采用CFRP对受压区混凝土进行侧向约束对梁的抗弯承载力影响不大,但可以较大地提高梁的延性。CFRP约束混凝土梁的位移延性系数比普通混凝土梁提高90%以上,耗能延性系数比普通混凝土梁提高116%以上。
Taking CFRP layers as parameters, the three-point loading test was carried out on one RC beam and two CFRP restrained compression beams (CFRP restraint beams) to observe the failure process of the beams. The strain distributions of concrete and CFRP pipe were obtained. The load- Mid-span curve and other data, and the ductility of the beam be analyzed. The results show that the lateral restraint of CFRP on the flexural capacity of the beam is not significant, but the ductility of the beam can be greatly improved. The displacement ductility coefficient of CFRP-confined concrete beams is over 90% higher than that of ordinary concrete beams, and the energy dissipation ductility coefficient is increased by 116% or more compared with ordinary concrete beams.