Progressive collapse assessment of medium-rise reinforced concrete flat slab structures

Abstract

The progressive collapse resistance of a medium‐rise multistory reinforced concrete flat slab structure is evaluated numerically using the applied element method. The case study is designed according to ACI 318 and its progressive collapse is assessed in accordance with the Unified Facilities Criteria (UFC) guidelines. The numerical results show that the case study considered generally satisfies the limits of the UFC guidelines except for the case of near‐corner interior column loss at the 10th floor and edge shear wall loss at ground, 5th, 8th, and 10th floors. The removal of the edge shear walls on the higher floors caused a partial collapse.

Research and practice on progressive collapse and robustness of building structures in the 21st century

“…21b). Some of the latest and most important works on simulating complete building structures by this technique are those by: Sasani et al [220], Galal and El-Sawy [26], Salem et al [262], Helmy et al [80,263,264], Khalil [265], Hefez et al [266], Dinu et al [267], Kim and Wee [268], Ehab et al [269], and Attia et al [270]. In all these studies the simulations were able to follow the structures until collapse after a sudden column removal.…”

Applied element method‐based blast‐resistant design of façade columns with limited standoff distance

“…The main resisting alternative load paths after losing a vertical support are the slab catenary action, as well as the Vierndeel action composed by the slabs, beams, and columns of the floors above the damaged support. It is clear that, the more floors above the level of damaged support, the stronger the Vierendeel action will be, resulting in better redistribution of forces and stability of the whole structure 17 . Conservatively, only the bottom three stories were modeled, since the increase in the number of the upper stories increases the effect of the Virendeel action, which give the structure more stability against progressive collapse.…”

“…It is clear that, the more floors above the level of damaged support, the stronger the Vierendeel action will be, resulting in better redistribution of forces and stability of the whole structure. 17 Conservatively, only the bottom three stories were modeled, since the increase in the number of the upper stories increases the effect of the Virendeel action, which give the structure more stability against progressive collapse. A linear-elastic static analysis was carried out on both models (full and partial models), to verify the accuracy of using the partial model and the boundary condition; by applying a horizontal force in Y direction acting on the external column at the height of 2 m from the ground.…”

Fragility and robustness analysis of a multistorey RC building

“…In the United States, documents [10,63] are used for seismic assessment, rehabilitation, and reinforcement of structures. Assessment of nonlinear behaviour of concrete structures with PCrelated damage is considered in [64,65]. A similar procedure for the analysis of PC in RC buildings with wall-stiffened frame systems is presented in [66], while numerical simulations for studying PC in RC buildings are discussed in [67].…”