Crack Extension Resistance of Normal-Strength Concrete Subjected to Elevated Temperatures
Joint Authors
Source
Advances in Materials Science and Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-06-25
Country of Publication
Egypt
No. of Pages
12
Abstract EN
Determination of the residual crack extension resistance curves ( K R -curves) associated with cohesive force distribution on fictitious crack zone of complete fracture process is implemented in present research.
The cohesive force distributes according to bilinear softening traction-separation law proposed by Petersson.
Totally ten temperatures varying from 20°C to 600°C and the specimen size of 230 × 200 × 200 mm with initial-notch depth ratios 0.4 are considered.
The load-crack mouth opening displacement curves (P-CMOD) of postfire specimens are obtained by wedge-splitting method from which the stress intensity factor curves ( K -curves) are calculated.
In each temperature, with the distribution of cohesive force along the fracture process zone, the residual fracture toughness K R ( Δ a ) increases with increasing crack length Δ a , whereas the K R -curves decrease with increasing temperatures T m for the thermal damage induced.
The stability analysis on crack propagation demonstrates that when the residual K R -curve is higher than K -curve, the crack propagates steadily; otherwise, the crack propagates unsteadily.
American Psychological Association (APA)
Chen, Jing& Lu, Zhoudao. 2014. Crack Extension Resistance of Normal-Strength Concrete Subjected to Elevated Temperatures. Advances in Materials Science and Engineering،Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-1034293
Modern Language Association (MLA)
Chen, Jing& Lu, Zhoudao. Crack Extension Resistance of Normal-Strength Concrete Subjected to Elevated Temperatures. Advances in Materials Science and Engineering No. 2014 (2014), pp.1-12.
https://search.emarefa.net/detail/BIM-1034293
American Medical Association (AMA)
Chen, Jing& Lu, Zhoudao. Crack Extension Resistance of Normal-Strength Concrete Subjected to Elevated Temperatures. Advances in Materials Science and Engineering. 2014. Vol. 2014, no. 2014, pp.1-12.
https://search.emarefa.net/detail/BIM-1034293
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1034293