Numerical Investigation of Fiber Reinforced Polymers Poststrengthened Concrete Slabs
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Volume 128, Issue 5
Abstract
The present work deals with the numerical simulation of fiber reinforced polymers (FRP) poststrengthened scaled concrete slabs in order to predict their load carrying behavior. The used strengthening materials are FRPs which are of increasing interest in civil engineering applications such as textile reinforced concrete tubes, cables of cable-stayed bridges, or even entire bridges. The numerical results are compared with experiments which were conducted at the Univ. of California, San Diego, and are described in detail by Hörmann in 1997; Hörmann et al. in 1998; and later by Seim et al. in 2001. The slabs are modeled for the numerical simulation first in a two-dimensional design space, assuming a plane stress condition for the concrete and the fiber reinforced polymer, and second in a three-dimensional design space with multilayered shell elements in order to include the varying response across the depth of the slabs. The used material model for reinforced concrete was developed by Menrath et al. in 1998 and has been enhanced for multilayered shell elements by Haufe et al. in 1999. It is based on multisurface plasticity, consisting of two Drucker–Prager yield surfaces and a spherical cap, and exhibits fracture energy based evolution laws for the softening regime. The reinforcement is taken into account as additional stress contribution in a smeared manner using a one-dimensional constitutive law based on an elastoplastic isotropic hardening model.
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Information
Published In
Journal of Engineering Mechanics
Volume 128 • Issue 5 • May 2002
Pages: 552 - 561
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Jun 7, 2001
Accepted: Aug 28, 2001
Published online: Apr 15, 2002
Published in print: May 2002
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