Dynamic Debris Loading in Flat Plate and Steel Framed Buildings

Jawdhari, Aamer; Orton, Sarah; Izzuddin, B.A.; Cormie, David

doi:10.1061/9780784481349.029

Cited by 2 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis showed that the demand quickly exceeded the punching shear capacity at early stages of the impact event and concluded that it is unlikely that a flat plate building will survive the impact from a falling floor. Jawdhari et al (Jawdhari et al, 2018) conducted analysis of a RC flat slab using the same concept of (Vlassis et al, 2009), assuming that the impacting RC slab is falling from one story height. The RC flat slab building showed low probability to survive the impact.…”

Section: Introductionmentioning

confidence: 99%

From impact of RC flat slabs in a building to its progressive collapse

Yankelevsky

Karinski

Tsemakh

et al. 2022

International Journal of Protective Structures

View full text Add to dashboard Cite

This paper presents a realistic model for the simulation of a progressive collapse scenario in a typical low-rise building that is constructed from RC flat slabs and supported by columns. The progressive collapse scenario starts after failure of the top slab connections, where the slab is falling downward and impacts with the slab below. This impact event is analyzed, and the dynamic failure of the impacted slab’s connections starts the progressive collapse event. Two different scenarios are identified, depending on the first slab damage condition prior to impact. The first scenario refers to an undamaged impacting slab where an elastic collision occurs with the slab below; in the second scenario, the first slab is damaged, and its collision with the slab below is plastic. In the first scenario, the impacting slab velocity drops to zero while its velocity is fully imparted to the impacted slab. In the second scenario, both slabs continue their motion jointly at a common velocity. In the subsequent impacts, the impacting slabs are a-priori damaged, hence plastic collisions occur. These impact occurrences are analyzed separately, depending on the number of impacting slabs involved, damage characteristics, and impact velocity. Due to the nature of the first impact, the first scenario is characterized by separate motion of the first impacting slab which is falling behind the other slabs. This slab gains speed until it meets the other falling slabs below at a certain altitude, and an intermediate collision occurs, not necessarily at a floor level. In the analyzed five-story building, the intermediate impact occurs after the third impact event, where the slabs are located slightly above the first story level. The intermediate impact elevates the velocity of the impacted slabs such that their impact with the first level slab is more severe and its motion toward hitting the ground level is faster.

show abstract

Section: Introductionmentioning

confidence: 99%