Dynamic and Static Mechanical Properties of Steel Fiber Reinforced Self-Compacting Concrete after Exposed to High Temperature

Abstract

Abstract: In order to explore the influence of high temperature on the dynamic and static mechanical properties of steel fiber reinforced self-compacting concrete (SFRSCC), the dynamic and static mechanical properties of SFRSCC at room temperature (25 ℃) and after heat treatment at different temperatures (200, 400, 600, 800 ℃) were tested, and the numerical simulation analysis was carried out by combining LS-DYNA software and HJC constitutive model. The results show that the static compressive strength of SFRSCC increases first and then decreases with the increase of temperature grade, and reaches the maximum value of 66.9 MPa at 200 ℃. Under the same level of impact load, with the increase of temperature grade, the dynamic compressive strength of SFRSCC increases first and then decreases, and reaches the maximum at 200 ℃. The dynamic compressive strength of SFRSCC increases with the impact load level, and the dynamic strength growth factor increases with the increase of strain rate. The failure modes of simulation and test are consistent.

Key words: steel fiber reinforced self-compacting concrete, high temperature, dynamic mechanical property, static mechanical property, numerical simulation

CLC Number:

TU528

ZHU Ming, GONG Nengping, MU Chaomin, CAI Tianyu, ZHANG Yu. Dynamic and Static Mechanical Properties of Steel Fiber Reinforced Self-Compacting Concrete after Exposed to High Temperature[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(11): 3895-3905.

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