Blast Performance of Prestressed Concrete Panels

Simplified Modeling of Frame Elements Subjected to Blast Loads

“…15, the peak midspan displacements were captured reasonably well. The overestimation for the first two analyses was expected due to the pin supports used in the analyses; the supports behaved as partially restrained in the experiments, as reported by Dunkman et al (2009). The analyses indicated no cracking, and minor cracking with 0.5 mm (0.02 in.)…”

“…These specimens were modeled in Dunkman et al (2009) using a simply supported SDOF model. Their study only provided the peak midspan displacement values without displacement histories, as listed in Table 1.…”

“…The last series of specimens examined was that tested by Dunkman et al (2009), involving one pre-tensioned and one post-tensioned, large-scale, one-way panels tested at the ABS testing facility in Bulverde, TX. The panels had a length of 2578 mm (101.5 in.…”

“…2 ), an ultimate strength of 1860 MPa (270 ksi), a yield stress of 1690 MPa (245 ksi), and a locked-in strain difference of 7.0 mε. As indicated in Dunkman et al (2009), 7% prestressing loss and a corresponding effective modulus of elasticity of 182,800 MPa (26,513 ksi) were used. For the No.…”

“…A time-step length of 0.02 ms was used, which was equal to the smallest natural vibration period of the specimens. The reflected pressure histories reported in Dunkman et al (2009) were used in the analyses with a trilinear idealization.…”