ANALYZING THE STIFFNESS DEGRADATION OF CFRP-PCPS COMPOSITE REINFORCED CONCRETE BEAM UNDER LOW REVERSED CYCLIC LOADING

Abstract

Abstract: In this paper, the low cyclic pseudo static test of 6 concrete beams is carried out. By using an ordinary reinforced concrete beam and a common prestressed concrete beam with CFRP reinforcement as the reference, the stiffness and damage degradation of 4 CFRP-PCPs composite beams with different tension control stresses and different sectional sizes are studied. The experimental results show that the CFRP-PCPs composite bars can effectively restrain the stiffness degradation of the structures. Based on the experimental results, the stiffness degradation of the specimens at the crack point, the yield point and the limit point are analyzed. Stiffness degradation calculation method of characteristic points of each specimen is presented. The calculated results are in good agreement with the experimental results. It will provide some reference value for predicting the development of deformation during the use of the structure.

Key words: CFRP-PCPs, stiffness degradation, low reversed cyclic loading, concrete beam

CLC Number:

TB332

DENG Yu, GAN De-li, ZHANG Peng, YANG Xi-tao. ANALYZING THE STIFFNESS DEGRADATION OF CFRP-PCPS COMPOSITE REINFORCED CONCRETE BEAM UNDER LOW REVERSED CYCLIC LOADING[J]. Fiber Reinforced Plastics/Composites, 2018, 0(3): 19-25.

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