Title:
Progressive Collapse Behaviour of Precast Floor-to-Floor System Using Pull-Out Failure Mode of Ties (Prepublished)
Author(s):
Mosleh Tohidi and Ali Bahadori-Jahromi
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
ductility; failure; precast; progressive collapse; pull-out; strength
DOI:
10.14359/51749161
Date:
9/10/2025
Abstract:
Although the issue of progressive collapse has been significantly studied within the broader field of structural engineering, the literature on the analysis and design of connections in precast concrete cross-wall buildings is rather limited. This study aims to investigate the progressive collapse behaviour of a typical precast floor-to-floor system, considering the pull-out failure mode of the deformed bar into grouted keyways of slabs at the joints. To do so, the pull-out behaviour of deformed bars in grouted keyways of the connections was first experimentally studied. Subsequently, by integrating the pull-out force-displacement data with findings from full-scale floor-to-floor experiments, an approximate analytical approach was formulated and validated to estimate the resistance to progressive collapse. The findings reveal that the floor-to-floor system, when subjected to the pull-out failure mode following the removal of a wall support, demonstrates a secondary peak strength and considerable ductility in contrast to the bar fracture failure mode.