A reinforced concrete shear wall building structure subjected to internal TNT explosions: Test results and numerical validation

• DOI: 10.1016/j.ijimpeng.2024.104950
• Publication Date: 2024-04-04T00:41:02Z
• Authors: Xuekang Guo; Yi Li; Daniel P. McCrum; Yutao Hu; Zhun Bai; Haoyou Zhang; Zhenyu Li; Xueji Wang
• Keywords: Slab; Substructure; Progressive Collapse

When an explosion occurs within reinforced concrete shear wall (RCSW) structures, the overpressures and duration of blast loads will be amplified by confining effects enclosed walls, which can cause a more severe damage to structure than free air (FAE). However, research on RCSW structures subjected internal explosions (IEs) are still limited no benchmark tests exist. To provide for studying resistance IEs, three Trinitrotoluene (TNT) IE field were conducted in this study 2-story, 3×3-bay, 1/3 scaled substructure, overpressures, displacements, crack patterns RCSWs recorded. The performed consecutively after each other same at TNT 95.3g (Test-1), 253g (Test-2), 400g (Test-3). test results showed that floor slab directly above one failed flexure (i.e., support rotation angle exceeds 2°) Test-2 with distance 1.53, whilst neighboring Test-3 1.31. In addition, detailed finite element model was established using LS-DYNA validated against results. numerical simulation energy released from scenarios (14.5 GJ/m3) 1.95 times FAE (7.43 GJ/m3). total applied increased decrease area opening. average impulse four similar scenarios, could represented center (excluding window opening, as opening is center). shock gas overpressure impulses accounted approximately 19.4% 80.6% impulse, respectively. Furthermore, peak centers experienced under 1.79 11.13 higher those This due confinement walls scenarios. Consequently, displacements levels substructure much larger