Dynamic response of lightweight wood-based flexible wall panels to blast and impulse loading
Publication Name: Construction and Building Materials
Publication URL: https://daneshyari.com/article/preview/257880.pdf
Recent research led to the development of light weight, rapidly erected, structural wall panels constructed from solid sawn 2 x 4 soft wood lumber studs and plywood sheathing coated in e-glass reinforcing.The objective of this study was to experimentally and numerically assess the dynamic blast response oft hese FRP-reinforced wood panels and explore the development of pressureimpulse (PI) diagrams based on a maximum deflection damage criterion. The results of five different field blast tests on the wall panels are reported. Laboratory pseudo-static bending tests of panels under fully reversed loading were performed to determine the panels load-deformation properties. A hysteretic load-deformation model was calibrated to the blast and pseudo-static bend data and used in a nonlinear, numerically integrated SDOF dynamic response model. PI diagrams were generated using both linear and non linear dynamic analysis. The results of this study indicate that the blast response of the wall panels can be reasonably represented with a nonlinear SDOF dynamic model. However, the model results are sensitive to the parameters of the hysteretic model. The results also indicate that PI diagrams are a potentially valuable tool for assessing damage under a variety of blastloads.