CFRP-PCPs复合筋嵌贴加固钢筋混凝土梁的延性分析

摘要

Based on the fundamental theory of flexural design calculation of concrete structure ,a calculation method of cross section ductility of concrete beam strengthened with near surface mounted CFRP-PCPs was presented ,and analysis and discussion the ductility of concrete beams have been tested.The results showed that CFRP tendons effective pre-tensile strain greater ,the ductility factor of strength-ened beam decreased;CFRP tendons lagged strain greater,the ductility factor of strengthened beam increased.%基于现行混凝土结构设计规范中抗弯设计计算的基本原理，提出了嵌贴CFRP-PCPs复合筋加固混凝土梁截面延性的计算方法，并结合已做试验对其延性进行分析讨论。结果表明，CFRP筋有效预拉应变越大，其加固梁的延性系数逐渐减小；CFRP筋滞后应变越大，其加固梁的延性系数逐渐增大。