Numerical Investigation of the Reinforced Concrete rectangular liquid storage structure (CRLSS) under blast impact by LBE method

Subject Areas : Analysis of Structure and Earthquake

Ali Ahmadi Zadeh ¹ , Kaveh Nezamisavojbolaghi ² , Alaaddin Behravesh ³ , Mohsen Parviz ⁴

1 - Ph.D Student, Department of Civil Engineering, Mahabad Branch, Islamic Azad University, West Azerbaijan, Iran
2 - Department of Civil Engineering, Mahabad Branch, Islamic Azad University, Mahabad, Iran
3 - استاد، گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه آزاد اسلامی واحد مهاباد، مهاباد، ایران
4 - Assistant Professor, Structural Engineering, Department of Civil Engineering, East Tehran Branch, Islamic Azad University, Tehran, Iran

Received: 2022-05-28 Accepted : 2022-07-23 Published : 2022-07-25

Keywords: Tank, Pressure, LS-DYNA, blast, Unburied, LBE,

Abstract :

Liquid Storage refers to structures utilized to store water in the water supply and refueling systems of industrial estates and refineries. These structures are also widely used in industrial areas and nuclear facilities. In the field of energy industry and macroeconomics, protection of resources and storage structures is considered as one of the important and strategic necessities. The present research investigated an unburied concrete reinforced liquid storage structure (CRLSS) with dimensions of 1 × 1 × 4 m under impact of blast with different TNT masses of 10, 12, 14, 16 and 18 kg at 2.5, 4 and 5.5 meters at both lateral and upper positions of the surrounding wall of the CRLSS. Load blast enhanced (LBE) and LS-DYNA, a non-linear dynamic software, were applied for modeling and explicit solution modeling was used to model the shock caused by the blast wave. The impact of shock, pressure and damage to the CRLSS has been investigated after validating the numerical method by laboratory studies by changing the distances and masses of TNT in both lateral and upper positions of the CRLSS. The results indicate that the most critical situation is when TNT is in the lateral position at 2.5 meters from CRLSS, and impact of blast shock and pressure on the CRLSS increased by approximately 20%, 30%, 36% and 43% by increasing the amount of TNT to 1.2, 1.4, 1.6 and 1.8 times, respectively. Based on the results, the reduction of the amount of damage and the spread of damage in the body of the CRLSS has occurred with the increase of the height of the fluid