Abstract
The progressive collapse behavior of fully assembled PC structures using dry connections under explosion, uncontrolled fire, and vehicle impact loads has seldom been studied. In the present study, three half scale moment sub-structures including a conventional RC specimen and two PC specimens using dowel bars and corbel were tested to investigate the progressive collapse performance. Collapse of the moment frame specimens with two spans was generated by the mid-column removal scenario under static loading. The test result showed that the peak strength of the PC specimens was only 76–81% of that of the RC specimen in compressive arch action and the ultimate displacement of the mid-column was 72–77% of that of the RC specimen. Unlike the RC specimen, catenary action was not completely developed in the PC specimens showing lower ductility. The load-displacement relationship and failure modes of the specimens agreed well with the prediction by finite element analysis, and a parametric study was conducted addressing various connection details to improve the progressive collapse performance of the PC moment sub-structure.
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