The effect of span length to height ratio of reinforced concrete slabs on pressure-impulse diagram with multiple failure modes under blast loading

Abstract

Abstract. In this paper, two loosely coupled single degree of freedom (SDOF) systems are used to generate pressure-impulse diagrams (P-I) with the flexural and direct shear responses of one-way reinforced concrete slabs subjected to blast loading. The effect of span length to height ratio in P-I diagrams is investigated. The numerical calculation results indicate that a slab tends to fail in a direct shear mode if the blast load amplitude is high but of short duration. It tends to fail in flexural failure mode if load amplitude is relatively low and duration is relatively long. And the failure of the slab might be a combination of shear and flexural damage in the dynamic loading region. Based on numerical results, different failure modes are got with different the span length to height ratio on the P-I diagrams. Results indicate that there is only shear failure mode in the P-I diagrams when L/h < 10.9. When L/h > 24.89, there are two damage mode in the P-I diagrams with flexure failure mode and flexure-shear failure mode. When 10.9 < L/h < 24.89, there are three damage modes in the P-I diagrams: shear failure mode, flexure failure mode and flexure-shear failure mode.

Pressure−impulse diagram method – a fundamental review

“… geometrical dimensions (Wesevich and Oswald, 2005;Yanchao Shi et al, 2008;Thilakarathna et al, 2010;Colombo and Martinelli, 2012;W. Wang et al, 2012b;Jun Li and Hao, 2013;Stolz et al, 2014)  ductility (Krauthammer et al, 2008;Razaqpur et al, 2009;El-Dakhakhni et al, 2010;Stolz et al, 2014)  strain rate (Razaqpur et al, 2009)  damping ratio (Krauthammer et al, 2008;  stiffness (Yu et al, 2018)  longitudinal and hoop reinforcement ratios (Symonds, 1953;Yanchao Shi et al, 2008;Colombo and Martinelli, 2012;Jun Li and Hao, 2013)  reinforcement configuration (Wesevich and Oswald, 2005;Thiagarajan et al, 2013)  material nonlinearity (X Huang et al, 2010;Dragos and Wu, 2014;Parlin et al, 2014)  concrete strength (Symonds, 1953;Yanchao Shi et al, 2008;Colombo and Martinelli, 2012;Jun Li and Hao, 2013;Parlin et al, 2014)  reinforcement strength (Symonds, 1953;Yanchao Shi et al, 2008)  strength and thickness of fibre reinforced polymer retrofitting wraps and strips (Mutalib and Hao, 2011)  axial force (Fallah and Louca, 2007;El-Dakhakhni et al, 2009;Astarlioglu et al, 2013;Chernin et al, 2016;Yu et al, 2018)  bending and shear capacity (Gombeda et al, 2017;Yu et al, 2018)  number of degrees of freedom…”

“…J. Shi et al, 2012;Astarlioglu et al, 2013;Jun Li and Hao, 2013;Nassr et al, 2013;Thiagarajan et al, 2013;Dragos and Wu, 2014;Parlin et al, 2014;Stolz et al, 2014;Hamra et al, 2015;Chernin et al, 2016;Syed et al, 2016;Gombeda et al, 2017;Xin Huang et al, 2017) or at its supports (G. W. Ma et al, 2007;H. J. Shi et al, 2012;W. Wang et al, 2012b;Jun Li and Hao, 2013), the maximum sideway deflections (Command, 1986), the maximum rotations (Command, 1986;Moghimi and Driver, 2015;Liu et al, 2018;Yu et al, 2018), the residual axial load-carrying capacity (Yanchao Shi et al, 2008;Mutalib and Hao, 2011;Ding et al, 2013), the maximum strain (Hooper et al, 2012;Xihong Zhang et al, 2013), von-Mises yielding criterion (Baker et al, 1978;Baker et al, 1983) and Tresca yielding criterion (Zhu et al, 1986).…”

Failure Behavior Analysis of Single-leaf Blast-resistant Door by Explosion Loads

“…무수한 조합의 폭발하중 조건 중 설계목표의 손상수준을 유발하는 조건을 폭발실험으로 찾아내는 것은 사실상 어렵다. 따라서, 대부분의 경우 보조적 방법으로서 유한요소해석을 사용하고 있다 (Shi et al, 2008;Wang et al, 2012;Abedini et al, 2019…”