Finite-Element Model for Pretensioned Prestressed Concrete Girders

Abstract

This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent repository link AbstractThis paper presents a nonlinear model for pretensioned prestressed concrete girders.The model consists of three main components: a beam-column element that describes the behavior of concrete, a truss element that describes the behavior of prestressing tendons, and a bond element that describes the transfer of stresses between the prestressing tendons and the concrete. The model is based on a two-field mixed formulation, where forces and deformations are both approximated within the element. The nonlinear response of the concrete and tendon components is based on the section discretization into fibers with uniaxial hysteretic material models. The stress transfer mechanism is modeled with a distributed interface element with special bond stress-slip relation. A method for accurately simulating the prestressing operation is presented. Accordingly, a complete nonlinear analysis is performed at the different stages of prestressing.Correlation studies of the proposed model with experimental results of pretensioned specimens are conducted. These studies confirmed the accuracy and efficiency of the model.

Accurate finite element modeling of pretensioned prestressed concrete beams

“…Since 1960's, finite element simulation to predict the response of prestressed concrete beams has been widely used. But some of the finite element models used for this purpose were grossly inadequate and were not representative of the real mechanics of prestressed concrete beams and most recent attempts to improve the situation [15][16][17] were not quite successful.…”

“…Herein after, all the three problems considered by Ayoub, Arab et al and Okumus et al [15][16][17] will be called problems of references 15, 16 and 17, respectively. As part of this study, these three problems are modeled and re-simulated by the authors, using the proposed finite element modeling scheme.…”

“…In their study, Ayoub and Filippou [15] implemented a mixed formulation based model to represent the prestressed concrete beam in the general purpose Finite Element Analysis Program (FEAP) [18]. The model of the prestressed concrete beam comprised of three components.…”

Absolute Nodal Coordinate Formulation in a Pre-Stressed Large-Displacements Dynamical System

“…The modeling of the pre-stress effect on bodies in mechanical systems is an interesting research topic in civil-engineering applications [11], where the static [12] and dynamic responses of structural elements are considered [13]. The effect of pre-stress is introduced to the ANCF finite elements to create an accurate model of a leaf spring, where pre-stress is evaluated based on the known geometrical states in the undeformed and deformed configurations that define the vector of absolute nodal coordinates [14].…”

“…The ANCF is a non-incremental method and it has been used for solving many different problems in mechanics, such as vehicle components [5] and [6], the modeling of belt drives [7], railroad applications [8], bio-mechanics [9] and also in the field of digital image correlation (DIC) [10]. The main features of the ANCF are a constant mass matrix, zero centrifugal and Coriolis inertia forces and the possibility for exact modeling of rigid-body movement.The modeling of the pre-stress effect on bodies in mechanical systems is an interesting research topic in civil-engineering applications [11], where the static [12] and dynamic responses of structural elements are considered [13]. The effect of pre-stress is introduced to the ANCF finite elements to create an accurate model of a leaf spring, where pre-stress is evaluated based on the known geometrical states in the undeformed and deformed configurations that define the vector of absolute nodal coordinates [14].…”