Progressive Collapse Behavior of Precast Floor-to-Floor System Using Pullout Failure Mode of Ties.

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Bibliographic Details
Title:	Progressive Collapse Behavior of Precast Floor-to-Floor System Using Pullout Failure Mode of Ties.
Authors:	Tohidi, Mosleh¹, Bahadori-Jahromi, Ali²
Source:	ACI Structural Journal. Mar2026, Vol. 123 Issue 2, p3-14. 12p.
Subjects:	Progressive collapse, Precast concrete, Reinforcing bars, Ductility, Structural engineering
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 behavior of a typical precast floor-tofloor system, considering the pullout failure mode of the deformed bar into grouted keyways of slabs at the joints. To do so, the pullout behavior of deformed bars in grouted keyways of the connections was first experimentally studied. Subsequently, by integrating the pullout 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 pullout 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. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
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 behavior of a typical precast floor-tofloor system, considering the pullout failure mode of the deformed bar into grouted keyways of slabs at the joints. To do so, the pullout behavior of deformed bars in grouted keyways of the connections was first experimentally studied. Subsequently, by integrating the pullout 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 pullout 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. [ABSTRACT FROM AUTHOR]
ISSN:	08893241
DOI:	10.14359/51749161