Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced Concrete
Abstract An experimental evaluation of crack propagation and post-cracking behavior in steel fiber reinforced concrete (SFRC) beams, using full-field displacements obtained from the digital image correlation technique is presented. Surface displacements and strains during the fracture test of notche...
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Online Access: | http://link.springer.com/article/10.1007/s40069-017-0197-4 |
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doaj-b06f1ab056dc4dd3afcc5f3b3e0e40b32020-11-25T00:32:15ZengSpringerOpenInternational Journal of Concrete Structures and Materials1976-04852234-13152017-05-0111236537510.1007/s40069-017-0197-4Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced ConcreteSahith Gali0Kolluru V. L. Subramaniam1Department of Civil Engineering, Indian Institute of Technology HyderabadDepartment of Civil Engineering, Indian Institute of Technology HyderabadAbstract An experimental evaluation of crack propagation and post-cracking behavior in steel fiber reinforced concrete (SFRC) beams, using full-field displacements obtained from the digital image correlation technique is presented. Surface displacements and strains during the fracture test of notched SFRC beams with volume fractions (Vf) of steel fibers equal to 0.5 and 0.75% are analyzed. An analysis procedure for determining the crack opening width over the depth of the beam during crack propagation in the flexure test is presented. The crack opening width is established as a function of the crack tip opening displacement and the residual flexural strength of SFRC beams. The softening in the post-peak load response is associated with the rapid surface crack propagation for small increases in crack tip opening displacement. The load recovery in the flexural response of SFRC is associated with a hinge-type behavior in the beam. For the stress gradient produced by flexure, the hinge is established before load recovery is initiated. The resistance provided by the fibers to the opening of the hinge produces the load recovery in the flexural response.http://link.springer.com/article/10.1007/s40069-017-0197-4steel fiberstoughnesscrack openingpost cracking responsesofteningfracture |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sahith Gali Kolluru V. L. Subramaniam |
spellingShingle |
Sahith Gali Kolluru V. L. Subramaniam Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced Concrete International Journal of Concrete Structures and Materials steel fibers toughness crack opening post cracking response softening fracture |
author_facet |
Sahith Gali Kolluru V. L. Subramaniam |
author_sort |
Sahith Gali |
title |
Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced Concrete |
title_short |
Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced Concrete |
title_full |
Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced Concrete |
title_fullStr |
Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced Concrete |
title_full_unstemmed |
Evaluation of Crack Propagation and Post-cracking Hinge-type Behavior in the Flexural Response of Steel Fiber Reinforced Concrete |
title_sort |
evaluation of crack propagation and post-cracking hinge-type behavior in the flexural response of steel fiber reinforced concrete |
publisher |
SpringerOpen |
series |
International Journal of Concrete Structures and Materials |
issn |
1976-0485 2234-1315 |
publishDate |
2017-05-01 |
description |
Abstract An experimental evaluation of crack propagation and post-cracking behavior in steel fiber reinforced concrete (SFRC) beams, using full-field displacements obtained from the digital image correlation technique is presented. Surface displacements and strains during the fracture test of notched SFRC beams with volume fractions (Vf) of steel fibers equal to 0.5 and 0.75% are analyzed. An analysis procedure for determining the crack opening width over the depth of the beam during crack propagation in the flexure test is presented. The crack opening width is established as a function of the crack tip opening displacement and the residual flexural strength of SFRC beams. The softening in the post-peak load response is associated with the rapid surface crack propagation for small increases in crack tip opening displacement. The load recovery in the flexural response of SFRC is associated with a hinge-type behavior in the beam. For the stress gradient produced by flexure, the hinge is established before load recovery is initiated. The resistance provided by the fibers to the opening of the hinge produces the load recovery in the flexural response. |
topic |
steel fibers toughness crack opening post cracking response softening fracture |
url |
http://link.springer.com/article/10.1007/s40069-017-0197-4 |
work_keys_str_mv |
AT sahithgali evaluationofcrackpropagationandpostcrackinghingetypebehaviorintheflexuralresponseofsteelfiberreinforcedconcrete AT kolluruvlsubramaniam evaluationofcrackpropagationandpostcrackinghingetypebehaviorintheflexuralresponseofsteelfiberreinforcedconcrete |
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1725320083636486144 |