波形齿体系张拉并锚固CFRP片材的预应力损失  

Experimental Analysis of Pre-stress Loss on Tensioning and Anchoring CFRP Sheet with Wave-shaped-gear

作　　者：陈小英[1,2] 李唐宁[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]重庆科技学院建筑工程学院,重庆401331

出　　处：《土木建筑与环境工程》2009年第3期18-24,共7页Journal of Civil,Architectural & Environment Engineering

基　　金：重庆市自然科学基金(CSTC2008BB6181);重庆大学研究生科技创新基金(200603Y1B0100153)

摘　　要：根据波形齿横向张拉并锚固碳纤维(以下简称CFRP)片材体系的加固施工工艺,对CFRP片材及被加固构件的材料特性造成的损失(松弛),温度变化引起的损失以及波形齿配套螺杆与被加固构件间的作用引起的损失进行了理论分析。并通过两类试验共8根构件(钢梁台座的4根构件及混凝土T梁加固试验的4根构件)中张拉后的CFRP片材的预应力(变)损失进行试验研究,提出了波形齿横向张拉并锚固CFRP片材体系中的CFRP片材设计时预应力总损失的建议值。Based on reinforced plastic （ material relaxation strengthened CFRP） sheet of CFRP sheet construction technology of lateral tensioning and anchoring carbon-fibre wave shaped-gear, theoretic analysis is made for the losses by trengthened member , the losses by temperature changing and the losses by action between screw bolt in wave-shaped-teeth grip and strengthened member. And pre-stress loss tests of CFRP after lateral tension are employed for eight members in two types of experiments （four for steel beam pedestal and four for concrete T-beams strengthening test）. Based on test and analysis, a design value of total pre-stress loss is proposed for CFRP sheet lateral tensioned and anchored by waveshaped gear.

关 键 词：预应力 波形齿 碳纤维 横向张拉 损失 

分 类 号：TU375.1[建筑科学—结构工程]