Reliability analysis of CFRP shear walls subject to blast loading

Abstract

This study presents the structural reliability of CFRP shear walls subject to blast loading. The safety of a reinforced concrete shear wall, laminated with Carbon Fibre Reinforced Polymer, is modelled with a 108.9kg of Ammonium Nitrate Fuel Oil (ANFO) an explosive, with an equivalent magnitude of 87kg Trinitrotoluene (TNT). The shear performance of the laminated wall under the blast is evaluated using the First Order Reliability Method (FORM) in MATLAB environment. An increasing decline in the shear possibility of the laminated wall was observed as the standoff distance of the explosion increased, which is consistent with experimental data.

Performance of composite shear walls strengthened with FRP and subjected to blast load

“…This type of analysis is very accurate for modelling at short intervals to record the high-frequency characteristics of shock and blast wave load and determine the structure response. The explicit method allows us to evaluate the nonlinear effects of materials and the geometry of the problem (Ajimituhuo et al, 2018). The explicit method is beneficial and practical for modelling dynamic problems in time and frequency, such as impact analysis and seismic effects.…”

“…In this equation, t f  is the tensile strength of concrete or in other words, the cracking stress of concrete, which according to ACI-318, is considered equal to 0.62 c f  . Furthermore, the 28-day compressive strength of the standard cylindrical sample, denoted by c f  , is considered equal to 40 MPa (Ajimituhuo et al, 2018). Moreover, the eccentricity is denoted by  the angle between the Von-Mises deflection stress and the hydrostatic stress, which is called the expansion angle and is denoted by  , varies between 15 and 45 degrees (Epackachi et al, 2014).…”