Flat slab design: past, present and future

Jones, A. E. K.; Morrison, J.

doi:10.1680/stbu.158.2.133.61194

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…They may be supported by beams on all four sides of each rectangular bay, or flat slabs with or without drop panels supported by columns located at rectangular grids. However, current design codes on slabs have emphasized more on simplicity and effectiveness of construction, but less on structural behaviour (Jones and Morrison, 2005). Compared to prescriptive design, performance-based design (Pang, 2006) has advantages of clearer goal and better understanding of structural behaviour, but it requires comprehensive study of experimental and numerical investigation on structures.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of two-way post-tensioned flat slabs in fire

Zhang

Wei

et al. 2017

JSFE

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Purpose This study aims to investigate the influence of tendon layout, pre-stressing force, bond condition and concrete spalling on the structural behaviour of two-way post-tensioned flat slabs at elevated temperatures. Design/methodology/approach Fire tests of four scale specimens of two-way post-tensioned concrete flat slabs were performed and analysed. Three of them were provided with bonded tendons, while the other was unbonded for comparison. The fabrication of specimens, phenomena observed during testing, temperature distributions, deflections and occurrence of concrete spalling were examined. Findings Different degrees of concrete spalling observed at the soffit had significant effects on the temperature distribution and stress redistribution. This was the major reason for the progressive concrete spalling observed, resulting in loss of structural integrity and stiffness. Originality/value The structural behaviour of two-way post-tensioned concrete flat slabs at elevated temperatures is less understood compared to their one-way counterparts. Therefore, the present study has focused on the structural behaviour of two-way post-tensioned concrete flat slabs with bonded tendons in fire, a field in which relatively little information on experimental work can be found.

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Section: Introductionmentioning

confidence: 99%

Experimental study of two-way post-tensioned flat slabs in fire

Zhang

Wei

et al. 2017

JSFE

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“…Hence strengthening of structures is an essential domain for the researchers. Nowadays, a large number of flat slabs may be considered structurally deficient by today's standards [1] as a result of introducing new methods and factors in the design procedure or need of structural upgrading to meet new seismic design requirements [2][3][4][5]. The rehabilitation and strengthening of structural members with composite materials, such as carbon, glass, kevlar, and aramid fiber-reinforced polymers (FRP), have recently received great attention [6].…”

Section: Introductionmentioning

confidence: 99%

Repair and Strengthening of Rc Slabs Using Ferrocement Layers Reinforced With Different FRP Meshes

Ramadan

2017

ERJ. Engineering Research Journal

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Ferrocement is one of the recent methods for repair and strengthening of reinforced concrete members. It can be described as a type of thin composite material made of cement mortar reinforced with wire meshes. The wire meshes are uniformly distributed in continuous layers with relatively small diameters. In this research, an experimental test program consists of eleven RC slab specimens repaired and strengthened by ferrocement layers reinforced by traditional steel reinforcement and steel wire meshes as well as manufactured glass and carbon fiber reinforced polymer meshes. The tested slabs classified in three groups. The first group consists of three specimens as reference slabs. The second group for repaired slabs consists of four specimens. They were loaded first by 80% of the ultimate loads and then cracks were repaired and then additional ferrocement layers with different wire meshes were added. The third group for strengthened slabs consists of four specimens. They were strengthened with additional ferrocement layers with different wire meshes without preloading. Slab specimens were tested under two-point loading and subjected to incremental loads till failure. Performance of the tested slabs such as deflections, cracking and ultimate loads as well as crack patterns were investigated, analyzed and discussed in this research. The test results confirm that repair and strengthening technique using ferrocement layers gives good results. Intertwined manufactured carbon fiber wire mesh gave best results for increasing the flexural capacity of RC slabs.

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Flat slab design: past, present and future

Cited by 2 publications

References 6 publications

Experimental study of two-way post-tensioned flat slabs in fire

Experimental study of two-way post-tensioned flat slabs in fire

Repair and Strengthening of Rc Slabs Using Ferrocement Layers Reinforced With Different FRP Meshes

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