Numerical derivation of P-I diagrams for shallow buried RC box structures. (June 2022)

• Record Type: Journal Article
• Authors: Qian, Haimin; Li, Jun; Pan, Yahao; Zong, Zhouhong; Wu, Chengqing
• Is Part Of: Tunnelling and underground space technology. Volume 124(2022)
• Publication Date: 2022-06
• Subjects: Buried RC box structure -- Pressure-impulse diagram -- Numerical simulation -- Analytical formulae; Tunneling -- Periodicals; Underground construction -- Periodicals; Tunnels -- Periodicals; Underground areas -- Periodicals; 624.193
• DOI: 10.1016/j.tust.2022.104454
• Languages: English
• ISSNs: 0886-7798

Abstract

Highlights: A numerical method to derive P-I diagrams for buried box structure is proposed. Loads on vertical walls affect P-I diagrams of buried box structures. Analytical formula for predicting P-I diagrams of buried box structures is proposed. Abstract: To perform quick damage assessment and preliminary blast resistant design, the present study develops Pressure-Impulse (P-I) diagrams for the shallow-buried box structures based on high fidelity numerical modelling. Shock wave propagation in the soil and its interaction with the roof slab and vertical wall are considered in the blast load modelling, both flexure and shear damage of the roof slab under surface blast loads are considered in the P-I diagram. Parametric studies are carried out to investigate the effects of roof span, wall thickness, concrete strength, flexure and shear reinforcement ratio on the P-I diagram. Based on the numerical results, analytical formulae to predict the P-I diagrams for buried box structures are derived. The applicability of the improved P-I diagrams approaches in practical evaluation is illustrated through case studies.