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Calculation of Bearing Capacity of RC Concrete Slabs in Fire(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2009年04期
Page:
14-23
Research Field:
Publishing date:
2009-12-20

Info

Title:
Calculation of Bearing Capacity of RC Concrete Slabs in Fire
Author(s):
DONG Yu-li
School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, Heilongjiang, China
Keywords:
reinforced concrete slab;  segment equilibrium method;  energy-based method;  limit bearing capacity;  yield hinge line;  elevated temperature;  fire
PACS:
TU375.2
DOI:
-
Abstract:
Two methods which could consider tensile membrane action were offered to calculate the limit bearing capacity of reinforced concrete slabs in fire conditions. Based on yield hinge line theory, the bearing capacity of reinforced concrete slabs in fire conditions was calculated by using segment equilibrium method and energy-based method. The comparison of calculated results and test results was carried out. The results show that the methods can be applied to sqaure slabs and rectangular slabs with orthotropic and isotropic renforcement. The models can interpret why the difference between sqaure slabs and rectangular slabs exists under the same condition.

References:

[1] BAILEY C G,LENNON T,MOORE D B.The Behaviour of Full-scale Steel Framed Buildings Subjected to Compartment Fires[J].The Structural Engin-eer,1999,77(8):15-21.
[2]O'CONNER M A,KIRBY B R,MARTIN D M.Behaviour of a Multi-storey Composite Steel Framed Building in Fire[J].The Structural Engineer,2003,81(2):27-36.
[3]PARK R.Tensile Membrane Behaviour of Uniformly Loaded Rectangular Reinforced Concrete Slabs with Full Restrained Edges[J].Magazine of Concrete Research,1964,16(46):39-44.
[4]PARK R.Ultimate Strength of Rectangular Concrete Slabs Under Short-term Uniform Loading with Edges Restrained Against Lateral Movement[J].Proceedings of the Institution of Civil Engineers,1964,28(2):125-150.
[5]SAWCZUK A,WINNICKI L.Plastic Behavior of Simply Supported Reinforced Concrete Plates at Moderately Large Deflections[J].International Journal of Solids and Structures,1965,1(1):97-111.
[6]KEMP K O.Yield of a Square Reinforced Concrete Slab on Simple Supports Allowing for Membrane Forces[J].The Structural Engineer,1967,45(7):235-240.
[7]TAYLOR R A.A Note on a Possible Basis for a New Methodof Ultimate Load Design of Reinforced Concrete Slabs[J].Magazine of Concrete Research,1965,17(53):183-186.
[8]MORLEY C T.Yield Line Theory for Reinforced Concrete Slabs at Moderately Large Deflections[J].Magazine of Concrete Research,1967,19(66):212-222.
[9]TAYLOR R,MAHER D R H,HAYES B.Effect of the Arrangement of Re-inforcement on the Behavior of Reinforced Concrete Slabs[J].Magazine of Concrete Research,1966,18(55):85-94.
[10]JANAS M.Large Plastic Deformations of Reinforced Concrete Slabs[J].International Journal of Solids Structures,1968,4(1):61-74.
[11]BAILEY C G.Membrane Action of Unrestrained Lightly Reinforced Concrete Slabs at Large Displacement[J].Engineering Structures,2001,23(5):470-483.
[12]FOSTER S J,BAILEY C G,BURGESS I W,et al.Experimental Behaviour of Concrete Floor Slabs at Large Displacements[J].Engineering Structures,2004,26(9):1231-1247.
[13]BAILEY C G,TOH W S.Small-scale Concrete Slab Tests at Ambient and Elevated Temperatures[J].En-gineering Structures,2007,29(10):2775-2791.
[14]BAILEY C G,WHITE D S,MOORE D B.The Tensile Membrane Action of Unrestrained Composite Slabs Simulated Under Fire Conditions[J].Engineering Structures,2000,22(12):1583-1595.
[15]BAILEY C G,TOH W S.Behaviour of Concrete Floor Slabs at Ambient and Elevated Temperatures[J].Fire Safety Journal,2007,42(6/7):425-436.
[16]CAMERON N J K,USMANI A S.New Design Method to Determine the Membrane Capacity of Laterally Restrained Composite Floor Slabs in Fire.Part 1:Theory and method[J].The Structural Engineer,2005,83(19):28-33.
[17]DONG Y L,FANG Y Y.Determination of Tensile Membrane Effects by Segment Equilibrium[J].Magazine of Concrete Research,2009,61(12):1-7.

Memo

Memo:
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Last Update: 2009-12-20