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Mechanical Behaviors of High-strength Concrete Columns Strengthened with CFRP Sheets Under Sustained Eccentric(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2011年01期
Page:
20-26
Research Field:
Publishing date:
2011-03-20

Info

Title:
Mechanical Behaviors of High-strength Concrete Columns Strengthened with CFRP Sheets Under Sustained Eccentric
Author(s):
WANG Ji-zhong;  ZHAO Yu-jie
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
Keywords:
high-strength concrete column;  carbon fiber reinforced polymer sheet;  eccentric compression;  load bearing capacity;  ductility
PACS:
TU375.3
DOI:
-
Abstract:
An experimental study of eight sustained loaded eccentric high-strength concrete columns strengthened with carbon fiber reinforced polymer(CFRP)sheets was carried out for testing the efficiency of the reinforcement approach. The failure characteristics and mechanical behaviors were investigated in the test of eight high-strength concrete square columns strengthened with CFRP sheets under different eccentricities, strengthening modes and sustained loaded levels. Finally, transverse strain, sectional strain distribution of concrete column, lateral deflection, as well as ultimate load bearing capacity in the CFRP sheets were analyzed. The results indicate that the effect of sustained loaded eccentric high-strength concrete columns strengthened with CFRP sheets is obvious, the ultimate load bearing capacity of concrete columns is enhanced and the ductility of concrete columns is improved. The efficiency of reinforcement decreases when the eccentricity and the sustained loaded value increase. Decreasing the usage amount of CFRP sheets also decreases the efficiency of reinforcement.

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Last Update: 2011-03-20