Blast and Impact Loading and Response of Structures
Full Session with Abstracts
Conventional unreinforced masonry has minimal ability to resist high-energy hazards such as those created by blast loads. Consequently, blast mitigation is essential for unreinforced masonry structures. This presentation will summarize research being conducted for the Department of Homeland Security (DHS) by the U.S. Army Engineer Research and Development Center (ERDC) and Lawrence Livermore National Laboratory (LLNL) relating to retrofitting unreinforced masonry for blast resistance. The objective of this research was to determine the most effective mitigation concept capable of resisting blast induced damage from near-contact detonations in unreinforced masonry. Small-scale masonry test specimens were fabricated to test four mitigation concepts subjected to the same explosive threat. These mitigation techniques were evaluated based on their ability to prevent breach and reduce deformation in unreinforced masonry. Based on this evaluation, a mitigation concept was selected and validated using full-scale field experimentation and computational modeling. This experimental data and a comprehensive material property study were used to validate predictions of the computational models. During this presentation, the experimental results will be compared to numerical predictions. This research will provide government and private agencies with critical information regarding mitigation schemes for unreinforced masonry and assist these agencies when they are required to determine the most efficient way to harden masonry structures that may be subjected to blast loads.