A new type of composite concrete which can be called corundum-rubble concrete (CRC) was presented to improve the resistance of protective structure to the projectile impact. Comparative experiments were conducted between CRC and reinforced concrete, and a modified Taylor model was proposed to predict the penetration depth of CRC targets. Experimental results show that CRC is much higher than reinforced concrete in both strength and hardness and shows excellent resistance to the 0.125 m-diameter projectile impact. Theoretical analyses demonstrated that the modified Taylor model’s predicted results were in good agreement with the measured values.

The dynamics model was established for the simple elastic support Beam structure and derived the natural frequency equations of simple elastic support beam. Then some special frequency equations for certain supporting conditions have been analysis via the above equation. The results show that vertical elastic support constraint and torsional elastic constraint have more influence to the natural frequency of beam.

For the comparative analysis of composite blast walls on the protective effects of blast wave, Overpressure protective effectiveness coefficient was put forward to analyze protective effectiveness and . It was studied that Protective effectiveness of composite blast walls under blast waves using 3D numerical simulation method and analysis of the amount of drugs, explosive distance, height and other structural parameters on protective effect of composite structures. The influence of several factors on forecasting formula was analyzed, such as scaled blast distance and scaled height of wall. Via fitting the simulation results overpressure formula of the back of composite blast walls was obtained. The result indicate that protective effectiveness of composite structure increases when walls height increases or scaled blast distance decreases.

Multilayered combination of protective structures is an important means of effectively weakening the explosive shockwave. On this basis, a "rigid-flexible-rigid" three-layer sealed structure was proposed in this paper and two models for the sealed structure were designed. Meanwhile, internal explosion tests of the two models were conducted. One model used foam concrete as the energy absorbing material and the other used dense sand. The comparisons between the test results and the computed results obtained from the formulae were made, and the test results agreed well with the computed results. Test results showed that both models had favorable energy-dissipating capacity, and the model that used foam concrete as the energy absorbing material had a superior energy-dissipating capacity.

Analytic solution for the dynamic response of underground structure is generally based on the theory of cylindrical shell. The underground structure constructed to resist internal blast is not suitable to be treated as cylindrical shell structure and is difficult to get analytic solution. In this paper, finite element code LS-DYNA is employed to calculate the dynamic response of underground blast-resistant structures exposed to internal blast. Two structures with different thickness buried in four types of surrounding rocks are calculated, and the influence of the surrounding rocks to the dynamic response of underground blast-resistant structures is analyzed.