Avoiding Disproportionate Collapse
340020 - Progressive Collapse Assessment of Load Bearing Wall Structures
Friday, April 20
11:00 AM - 12:30 PM
This paper examines the progressive collapse performance of the existing multi-story wall buildings located on the Ohio State University campus in Columbus, Ohio. Field experiments were conducted and computational simulations were performed to investigate the vulnerability to progressive collapse for the load-bearing wall buildings. During the field experiments, four exterior load-bearing walls on the ground floor were physically removed from the perimeter of the building. Vertical deflection of concrete beams and strain changes were measured during the removal of walls. Due to the lack of test data on full-scale buildings with load bearing walls, the experimental data acquired in this research are used to validate numerical models and analysis, and evaluate progressive collapse performance of load-bearing wall buildings. Another objective of this research is to identify the collapse performance of the buildings through linear static and nonlinear dynamic analyses due to the sudden loss of load-bearing walls. Two- and three- models were developed and the calculated results were examined and compared with the experimental data. This study investigated how the internal forces were redistributed within the masonry building after each wall was removed and how the adjacent structural walls were influenced. Another goal is to propose the progressive collapse evaluation criteria for specifically wall buildings. Current methods are reviewed and utilized to analyze and evaluate the collapse potential. The recommendations for the progressive collapse evaluation of wall structures are presented as well.