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Collapse mechanisms and limit loads of two- way slabs in reinforced concrete floors



Title: Collapse mechanisms and limit loads of two- way slabs in reinforced concrete floors
Author(s): P. Shen, Z. Liu, H. Wang
Paper category : conference
Book title: International Conference on Advances in Concrete and Structures
Editor(s): Ying-shu Yuan, Surendra P. Shah and Heng-lin Lü
Print-ISBN: 2-912143-41-1
e-ISBN: 2351580176
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 1125 - 1130
Total Pages: 6
Nb references: 4
Language: English


Abstract: 
Eleven collapse mechanisms of two-way rectangular slabs with isotropic reinforcement in reinforced concrete floors supported by columns were compared. It was shown that the composite beam and slab collapse mechanisms always happened earlier than the collapse mechanisms of the slabs assuming that membrane action was neglected. The formulae of limit loads of the collapse mechanisms have been given in this paper. Usually, the panels of two-way slabs in reinforced concrete floors supported by columns are designed assuming that the supporting beams are stiff and the collapses only happen in the slabs. However, the supporting beams are also designed using limit design approach. They are just strong for carrying the loads which are transferred from the slabs. The collapse mechanisms which involve both the beams and the slabs can happen. These types of failure mechanisms have been met in some tests[3][4]. R. H. Wood has examined the composite beam and slab collapse mechanisms of simply supported slabs assuming that full redistribution of bending moments can occur in the beams before collapse of the slabs[1]. R. Park has tested two-way reinforced concrete slabs and has discussed limit design approach of the supporting beams [2].In this paper, more composite collapse mechanisms of both the beams and the slabs uniformly loaded rectangular slabs with isotropic reinforcement of reinforced concrete floors supported by columns have been examined including the collapse mechanism of slabs. It is shown that the composite collapse mechanisms are always formed earlier than the collapse mechanism of slabs.


Online publication: 2003-08-10
Publication type : full_text
Public price (Euros): 0.00