Reliability study of shear strengths of FRP reinforced concrete beams using experimental test database

doi:10.19936/j.cnki.2096-8000.20220228.001

Abstract

Abstract: FRP bars have the advantages of corrosion resistance, high tensile strength and fatigue resistance, and are expected to replace steel bars to solve the problem of corrosion of steel bars in civil engineering structures. However, the shear performance of FRP reinforced concrete structures is different from that of steel reinforced concrete structures, due to the low elastic modulus and poor bonding behavior of FRP bars. The present theoretical models of shear capacity of FRP reinforced concrete structure are established based on limited test results, and their applicability and accuracy cannot be well guaranteed. Therefore, this paper first collects the shear test data of FRP reinforced concrete beams at home and abroad, and then establishes a test database containing 478 groups of shear capacity. The global sensitivity analysis of the above test beam parameters based on Monte Carlo method was carried out, and the applicability of four existing shear capacity calculation models based on the established database was analyzed. Considering the uncertainty of parameters, Monte Carlo method and reliability theory are used to analyze the reliability of the model. The results show that the calculation model of shear capacity by using CSA code is in good agreement with the test results. The reliability index is positively correlated with the living-constant ratio and the fractional coefficient of FRP material.

Key words: fiber reinforced polymer (FRP), shear capacity, database, reliability

CLC Number:

TB332

CHEN Tai-gu, HU Shou-wang, LUO Yuan-bin, ZHENG Yu, LI Ming. Reliability study of shear strengths of FRP reinforced concrete beams using experimental test database[J]. COMPOSITES SCIENCE AND ENGINEERING, 2022, 0(2): 5-10.

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