Constitutive Model for Reinforcing Steel under Cyclic Loading
Publication: Journal of Structural Engineering
Volume 142, Issue 12
Abstract
The hysteretic stress-strain response of steel reinforcement can significantly affect the performance of reinforced concrete (RC) structures. Additionally, the possibility of inelastic buckling and fracture of longitudinal bars can have a negative impact on the ductility of RC flexural members. This paper presents a uniaxial material model to describe the inelastic behavior of reinforcing steel under cyclic loading. As a starting point, an existing hysteretic law is employed, which is capable of capturing the material behavior in the absence of buckling and rupture. One issue with this existing law is the need for an iterative stress calculation. A series of enhancements to the hysteretic law are established, including the formulation and implementation of a noniterative stress update procedure and the capability to efficiently account for local inelastic buckling and rupture due to low-cycle fatigue. The proposed material model is validated using the results of experimental tests.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 142 • Issue 12 • December 2016
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Aug 17, 2015
Accepted: Apr 27, 2016
Published online: Jul 18, 2016
Published in print: Dec 1, 2016
Discussion open until: Dec 18, 2016
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