Abstract
A calculation method of SCS wall which is used in the third generation of nuclear power plants to resist perforation from rigid projectile based on energy method is proposed in this paper. The energy is divided into four parts including the energy dissipated by front steel plate, concrete, back steel plate, and tie bars. The method accounts for the perforation of the concrete and steel plates separately and accounts for the interaction between them, and a practical antiperforation calculation formula of SCS wall with tie bars is given. The most formular results are close to the test results and the FEM results with a deviation less than 10%, which shows that the calculation formula given in this paper is reasonable and credible to effectively evaluate the perforation failure of the SCS wall and carry out a relevant design. The energy dissipated by the steel plate is much larger than that of the tie bars through a comparative analysis of dissipated energy. The effects of various factors on perforation velocity are analyzed according to finite element calculation results, which can be roughly divided into three categories: the influence of the thickness of steel plate and distance of tie bar is the largest effect, followed by that of yield strength of steel plate, yield strength of tie bar and diameter of tie bar, and that of compressive strength of concrete is the smallest effect.
Highlights
Steel-concrete-steel (SCS) sandwich wall is constructed with steel surface plates that act as concrete reinforcement. e tie bars and shear studs are welded to the steel faceplates to develop the composite behaviour of the steel faceplates and concrete. e SCS walls are used in the shield building of the third generation of nuclear power plants to keep the internal steel containment and reactor cooling system from damage by external events
A calculation method of SCS wall to resist perforation from rigid projectile based on energy method is proposed in this paper, which accounts for the perforation of the concrete and steel plates separately and accounts for the interaction between them, and a practical antiperforation calculation formula of SCS wall with tie bars is given. e rationality and feasibility of the given calculation formula are verified by comparing its calculation results with existing test data and finite element analysis results, and the effect of various factors on perforation velocity is analyzed by the finite element method (FEM)
(1) In order to study local damage of SCS walls which is used in the third generation of nuclear power plants caused by aircraft engine or missile impact, a calculation method of SCS wall to resist perforation from rigid projectile based on energy method is proposed in this paper, which accounts for the perforation of the concrete and steel plates separately and accounts for the interaction between them; the energy is divided into four parts, namely, the energy dissipated by front steel plate, concrete, rear steel plate, and tie bars
Summary
Steel-concrete-steel (SCS) sandwich wall is constructed with steel surface plates that act as concrete reinforcement. e tie bars and shear studs are welded to the steel faceplates to develop the composite behaviour of the steel faceplates and concrete. e SCS walls are used in the shield building of the third generation of nuclear power plants to keep the internal steel containment and reactor cooling system from damage by external events. E formula for calculating the energy dissipated by the rear steel plate is shown in equation (12), the perforation velocity Vbls is shown in equation (13), and N is defined by equation (14), where ρc is the density of concrete: Ws2 At this stage, the diameter of the formed projectile contact with the rear steel plate is taken as d to account for the fact that a portion of the impacting concrete surface will crush and the entire diameter of the circular truncated cone plug does not impact the steel plate as a rigid projectile. Under the condition of the SCS wall with tie bars against the rigid projectile, the perforation velocity Vp can be calculated by equation (20); the energy dissipation of each part has been defined in equations (2), (11), (12), and (19)
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