Small-scale concrete slab tests at ambient and elevated temperatures

Bailey, Colin; Toh, Wee S.

doi:10.1016/j.engstruct.2007.01.023

Cited by 90 publications

(123 citation statements)

References 14 publications

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“…With reference to Fig. 4c, it is evident that at similar levels of deflection, S-F60-M6-A resisted significantly higher loads than R-F60-M6-A; this is in agreement with previous findings [19]. In terms of the failure displacement, the greater in-plane stiffness of S-F60-M6-A led to a corresponding increase in the degree of strain concentration in the reinforcement, thereby reducing the ductility of the specimen and expediting failure.…”

Section: Aspect Ratiosupporting

confidence: 82%

Failure Assessment of Lightly Reinforced Floor Slabs. I: Experimental Investigation

2011

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This paper is concerned with the ultimate behaviour of lightly reinforced concrete floor slabs under extreme loading conditions. Particular emphasis is given to examining the failure conditions of idealised composite slabs which become lightly reinforced in a fire situation due to the early loss of the steel deck. An experimental study is described which focuses on the response of two-way spanning floor slabs with various material and geometric configurations. The tests enable direct assessment of the influence of a number of key parameters such as the reinforcement type, properties and ratio on the ultimate response. The results also permit the development of simplified expressions, which capture the influence of salient factors such as bond characteristics and reinforcement properties, for predicting the ductility of lightly reinforced floor slabs. The companion paper complements the experimental observations with detailed numerical assessments of the ultimate response, and proposes analytical models which predict failure of slab members by either reinforcement fracture or compressive crushing of concrete.

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Section: Aspect Ratiosupporting

confidence: 82%

Failure Assessment of Lightly Reinforced Floor Slabs. I: Experimental Investigation

2011

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“…The static system is shown in Figure 8.2 and the input file can be found in Annex B. 9. Only a part of the structure will be modelled since the single sections of the slab are similar.…”

Section: Modelling and Resultsmentioning

confidence: 99%

“…After about 19 minutes gaping cracks occurred nearby the intermediate beam as shown in Figure 3. 9. Smoke streamed through crack 1 to the upper side of the slab.…”

Section: Results Testmentioning

confidence: 99%

“…A reinforced concrete bar will be considered as shown in Figure 5. 9. The bar is tensioned due to restraint forces, which occur for example in a horizontally restrained slab with temperature change.…”

Section: Tension Stiffeningmentioning

confidence: 99%

“…The structure did not collapse but again a slab failed in terms of integrity. Small scale tests were performed for instance by Colin Bailey [9], Samantha Foster [35] and Anthony Abu [1].…”

Section: Fig 21: Gaping Crack Nearby the Intermediate Beam In Firstmentioning

confidence: 99%

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Design of Composite Slab Systems in Case of Fire Using Simplified Finite Element Analyses

Stadler¹

2013

Stahlbau

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A new method is presented in this thesis for designing both full concrete and composite slab systems with partially unprotected secondary steel beams in case of fire taking into account tensile membrane action.Simplified finite element analyses are used for determining the internal forces in the structure. Crosssection design procedures can be applied with these internal forces to calculate the required reinforcement amount like under ambient temperature. The finite element model is simplified by replacing the thermal analysis with a substitute thermal loading. Non-linear material behaviour is taken into account by a reduced stiffness of the model which allows an efficient linear elastic calculation. The presented method therefore enables a simple and efficient design of slab systems in case of fire. Zusammenfassung

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