Study on the calculation method of impact resistance of double-skin steel-concrete composite wall

Abstract

Abstract: In order to study the impact resistance of double-skin steel-concrete composite (SC) wall, the numerical model under coupled axial and impact loads was established using ABAQUS software. The accuracy of the finite element modeling was validated against the test results of SC members under drop-hammer impact. Firstly, the impact-resistance mechanism of SC wall was analyzed. Then, the influences of the steel plate ratio, axial-load ratio and other parameters on dynamic responses were investigated. Finally, a simplified equation was developed to predict the maximum mid-span deflection of axial-loaded SC wall under impact load. The results show that: the whole impact process can be divided into four phases, the sandwiched concrete is the main energy-dissipation component during impact; ratio of axial compression stress to strength would weaken the impact resistance of test specimen, and the effect is more obvious when the ratio of axial compression stress to strength exceeds 0.2; steel content of steel plate, impact velocity, impact mass and spacing of tension bars have significant influences on the impact resistance; the empirical formula suggested can well predict the maximum mid-span deformation of axial-loaded SC wall under an impact load.

Key words: double-skin steel-concrete composite wall, axial and impact combined load, finite element analysis, deformation prediction

CLC Number:

TU398

SUN Ji-hong, AN Guo-qing, WANG Rui. Study on the calculation method of impact resistance of double-skin steel-concrete composite wall[J]. Journal of Lanzhou University of Technology, 2023, 49(4): 108-116.

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