MECHANICAL BEHAVIOR OF FRP GRIDS AS TRANSVERSE REINFORCEMENT IN CONCRETE MEMBER

Abstract

Abstract: Fibre-reinforced polymer (FRP) grids have the advantages of high-strength and anti-corrosion, and could be applied in concrete members as transverse reinforcements. Due to its linear elastic character and brittle failure modes, conventional material test methods are not able to capture the status and the failure modes of the grids in concrete structural members. In this work, two novel test methods, namely diagonal burst test and straight-line burst test, are proposed, with which failure modes and mechanical behaviour of FRP grids are obtained experimentally. Through the diagonal burst test, two typical failure modes, i.e. joint failure and rod failure,could be achieved. The strength of the joint can be tested to ensure the efficiency of grid rods in structural members. The straight-line burst test can obtain the strength efficiency when the grids fail in joint failure mode. According to the test results, a simplified strength model for FRP grids is proposed. The strength efficiency of FRP grids in square concrete columns subjected to axial compression is predicted with the proposed model. The predictions show good agreement with the test results.

Key words: FRP grids, diagonal burst test, straight-line burst test, prediction model, efficiency of FRP grid

CLC Number:

TB332

SHA Xiong, FENG Peng, YANG Jia-qi, WANG Ze-yuan. MECHANICAL BEHAVIOR OF FRP GRIDS AS TRANSVERSE REINFORCEMENT IN CONCRETE MEMBER[J]. Fiber Reinforced Plastics/Composites, 2019, 0(9): 58-63.

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