Analysis of Blast Wave Propagation and Dynamic Response of Structures behind an Explosion-Proof Dike
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TECHNICAL ARTICLE–PEER-REVIEWED
Analysis of Blast Wave Propagation and Dynamic Response of Structures behind an Explosion-Proof Dike Xiaoxiao Wang . Runqing Yu
Submitted: 20 March 2019 Ó ASM International 2019
Abstract This paper is focused on the dynamic response of the structure protected by an explosion-proof dike. The hydrocode LS-DYNA is employed to model the shock wave propagation before and after the dike. The dynamic behavior of structure under shock wave behind the explosion-proof dike is studied numerically to analyze the blast wave attenuation. Firstly, the characteristics of the shock wave propagation are modeled and compared with analytical results. A good agreement is obtained. Secondly, the propagation of blast wave before and after a dike is simulated. The area behind the dike is divided into three regions based on the peak overpressure of blast wave. The characteristics of the peak overpressure are discussed, respectively, in the three regions. The effects of the dike configurations are analyzed numerically. Thirdly, the dynamic response of the structures protected by the dike is analyzed under blast. The behavior of the structures located at different regions is compared. Besides, the protection capability of the dike is evaluated. At last, a simplified way is presented to model the blast loads at the right side of the dike. It is convenient to analyze the dynamic behavior of the structures protected by the dike. Results show that it is reliable to predict the dynamic response of the structure by employing the simplified loads. Keywords Blast wave attenuation Explosion-proof dike Numerical simulation Structural dynamic response
X. Wang R. Yu (&) Air Force Second Service Group of Engineering and Technology, Guangzhou 510403, Guangdong, China e-mail: [email protected]
Introduction Accidental or intentional explosions, such as the bomb blast and the terrorist attacks, are becoming a major threat to critical infrastructure and people in the world. Under blast, significant damage may occur to the constructions. It has alerted the need for developing effective methods to protect important buildings. During the past decades, numerous studies have been conducted to estimate the dynamic response and the damage of structures under blast loading [1–5]. The explosion-proof dikes belong to the rigid barriers that are generally made of soil, sand or other materials. It has been used extensively in protective engineering. It could mitigate the blast overpressure by the diffraction of the shock waves and protect constructions and people effectively. The configurations of the dike are critical to the mitigation of blast overpressure. It is necessary to investigate the protective characteristics of barriers for the protected object. Many investigations have been conducted on this issue. Scherbatiuk et al. [6] provide an efficient analytical model to calculate the dynamic response of a soil-filled wall subjected to air blast loading. The proposed analytical model is validated by full-scale tests and shows
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