STUDY ON THE AGING MECHANISM AND FLEXURAL BEHAVIOR OF GFRP REINFORCED CONCRETE MEMBERS UNDER LONG-TERM CORROSION ENVIRONMENT

Abstract

Abstract: In order to study the aging mechanism and flexural behavior of GFRP reinforced concrete members under long-term corrosion environment, the effects of moisture, temperature and alkali environment on the tensile strength, effective tensile area and bond strength of GFRP bar were analyzed separately. Based on the change of the relationship between the material aging and cooperative work with concrete, the calculating formula of the flexural capacity of the normal section of the aging GFRP bar is derived by constructing the new geometrical condition, and using the derived formula to analyze the influence of aging rate on the bearing capacity of the component. The researches show that GFRP reinforced concrete member under the long-term effect of the corrosion environment, GFRP tendons aging, its tensile strength, effective tensile area and bond properties have different degrees of reduction. As the aging rate of GFRP reinforced materials increases, the loss rate of flexural capacity of the component is also increasing. When the aging rate is 27%, the flexural capacity of the component is also lost by 25.97%.

Key words: GFRP bars, aging mechanism, concrete component, flexural capacity

CLC Number:

TB332

LI Xing, SUN Li-xiang, LIN Peng-zhen, YANG Zi-jiang. STUDY ON THE AGING MECHANISM AND FLEXURAL BEHAVIOR OF GFRP REINFORCED CONCRETE MEMBERS UNDER LONG-TERM CORROSION ENVIRONMENT[J]. Fiber Reinforced Plastics/Composites, 2017, 0(6): 12-17.

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