Numerical simulation and a calculation approach for the impact response of half-sc slabs

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (20) : 309-318.

ZHAO Weiyi, PANG Qinghong

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Abstract

A finite element model of half steel plate-concrete composite slabs (Half-SC slabs) under impact action was established using LS-DYNA. The accuracy of the model was verified based on the available test results. The effects of the impactor mass, the impact velocity, and the steel plate thickness on the displacement response of Half-SC slabs were further analyzed. On this basis, the resistance and stiffness equations of the Half-SC slabs were derived. The resistance function of the Half-SC slabs was proposed. Thus, an equivalent single-degree-of-freedom model for calculating the displacement response of the Half-SC slabs was established. The results show that the damage process of Half-SC slabs under impact can be divided into three stages such as the elastic stage, the concrete cracking stage, and the horizontal reinforcement fracture stage. The impact velocity has the greatest influence on the displacement response of the Half-SC slabs, followed by the impactor mass and the steel plate thickness. The proposed equivalent single degree of freedom model can accurately predict the displacement time histories of Half-SC slabs.

Key words

half steel plate-concrete composite slabs / displacement response / numerical simulation / parametric analysis / equivalent single-degree-of-freedom model

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ZHAO Weiyi, PANG Qinghong. Numerical simulation and a calculation approach for the impact response of half-sc slabs[J]. Journal of Vibration and Shock, 2023, 42(20): 309-318

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