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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/15601
Title: Moment curvature relationships for fire damaged reinforced concrete sections
Authors: Phani Prasad D.M.S.
Kumar V.
Sharma U.K.
Bhargava P.
Published in: Proceedings of Structures in Fire - Sixth International Conference, SiF'10
Abstract: Once fire breaks out in a structure, it results in the loss of strength of the structure and as it may not be possible to use the structure safely, repair and rehabilitation options are to be chosen. To check for the feasibility options, it is often necessary to study the behavior of the structural elements after fire exposure. The relationship between moment and curvature demonstrates the strength and deformation characteristics of a given reinforced concrete section. If a complete moment-curvature relationship of fire damaged reinforced concrete section is available, one can determine the residual strength and ductility of the structural element. To this end, this paper reports the results of an experimental study carried out to determine the moment curvature relationships for fire damaged reinforced concrete beams. A total of 12 reinforced concrete beams of 100 mm x 200 mm x 2000 mm size were cast and tested under this test program. Test parameters were grade of concrete, lateral spacing of ties and duration of fire exposure. The doubly reinforced concrete beams were first exposed to standard fire in a full scale fire furnace. Subsequently after cooling, their moment curvature responses were recorded under two point loading. Based on the results, it has been found that the grade of concrete, transverse reinforcement spacing and duration of fire have considerable amount of influence on the moment carrying capacity and curvatures of the sections. The yield and the ultimate moment capacities of all the fire damaged beams decreased with an increase in fire duration. While the yield and ultimate curvatures increased with an increase in fire duration, the overall curvature ductility reduced.
Citation: Proceedings of Structures in Fire - Sixth International Conference, SiF'10, (2010), 247- 253. East Lansing, MI
URI: http://repository.iitr.ac.in/handle/123456789/15601
Issue Date: 2010
Keywords: Carrying capacity
Curvature ductility
Damaged beam
Experimental studies
Fire duration
Fire exposures
Full scale fires
Loss of strength
Moment curvature
Moment-curvature relationship
Reinforced concrete beams
Residual strength
Standard fire
Strength and deformation characteristics
Structural elements
Test parameters
Test program
Transverse reinforcement
Two-point
Ultimate moment capacity
Composite beams and girders
Composite structures
Concrete beams and girders
Concrete buildings
Ductility
Reinforced concrete
Fires
ISBN: 9781605950273
Author Scopus IDs: 36461581900
57210244397
57214359120
14068541600
Author Affiliations: Phani Prasad, D.M.S., Department of Civil Engineering, Indian Institute of Technology, Roorkee, 247 667, India
Kumar, V., Department of Civil Engineering, Indian Institute of Technology, Roorkee, 247 667, India
Sharma, U.K., Department of Civil Engineering, Indian Institute of Technology, Roorkee, 247 667, India
Bhargava, P., Department of Civil Engineering, Indian Institute of Technology, Roorkee, 247 667, India
Corresponding Author: Phani Prasad, D. M. S.; Department of Civil Engineering, Indian Institute of Technology, Roorkee, 247 667, India
Appears in Collections:Conference Publications [CE]

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