Research on stress loss of prestressed carbon fiber composite cable reinforced concrete T beam

doi:10.19936/j.cnki.2096-8000.20230328.007

Abstract

Abstract: Carbon fiber reinforced composites (CFRP) bars are widely used in prestressed concrete structures due to their high tensile strength, corrosion resistance, and good fatigue properties. In order to explore the prestress loss behavior of CFRP cables reinforced concrete T beams, three unbonded prestressed CFRP cables reinforced concrete T beams were fabricated, prestress distribution of CFRP cable-reinforced concrete T beams and the effect of tensioning method on prestress loss was studied. The test results show that the prestress of the prestressed carbon fiber composite cable reinforced concrete T beam gradually decreases from the tension end to the anchor end, and the CFRP bars with small diameters in the CFRP cables have small prestress and serious stress unevenness. When using graded tension, the prestress loss of the carbon fiber composite cable is small. But when it is tensioned in conventional way, the prestress loss increases significantly, part of the stress loss can be eliminated by repeated tensioning.

Key words: CFRP cables, prestressed loss, stress monitoring, tension method

CLC Number:

TB332

WANG Zihao, LI Chenggao, XIAN Guijun, BAI Jie, XIONG Hao, XU Guowen. Research on stress loss of prestressed carbon fiber composite cable reinforced concrete T beam[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(3): 44-52.

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