Experimental Analysis of Pre stress Loss on Tensioning and Anchoring CFRP Sheet with Wave shaped gear
CHEN Xiao ying and LI Tang ning
DOI:10.11835/j.issn.1674-4764.2009.03.005
Received January 07, 2009,Revised , Accepted , Available online July 01, 2015
Volume ,2009,Pages 18-24
- Abstract
Based on strengthened construction technology of lateral tensioning and anchoring carbon fibre reinforced plastic (CFRP) sheet with wave shaped gear, theoretic analysis is made for the losses by material relaxation of CFRP sheet and strengthened 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 wave shaped gear.