Dynamic pull-out test simulations using the lattice discrete particle model (LDPM)

Gianluca Cusatis*, Daniele Pelessone, James T. Baylot

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

This paper presents a novel algorithm to simulate rebar-concrete interaction when concrete is modeled using the Lattice Discrete Particle Model (LDPM), a recently developed three-dimensional meso-mechanical model. In the LDPM formulation, the mesostructure of concrete is simulated by an assemblage of particles interacting through nonlinear springs. Each particle represents a coarse aggregate piece with its surrounding mortar. The rebar-concrete interaction algorithm consists of a constraint element that treats the interaction of discrete particles close to the rebar with adjacent rebar finite elements. Bond constitutive equations provide relationships for computing interface forces given the relative displacements between particles and rebars. These equations implement the complex physical mechanisms that take place in the thin concrete layer surrounding steel rebars, including the formation of oblique cracks, dilation due to slippage, friction, etc. The complete formulation (LDPM, rebars, and bond interaction) is implemented in the framework of the object oriented dynamic finite element code MARS. Calibration and validation activities are being performed using a series of pull-out experiments recently conducted at the US Army Engineer Research and Development Center (ERDC) in both quasi-static and dynamic regimes. Three examples consisting of highly dynamic 'impact' pull-out tests are presented.

Original languageEnglish (US)
Title of host publicationProceedings of 18th Analysis and Computation Speciality Conference - Structures Congress 2008
Subtitle of host publicationCrossing the Borders
Volume315
StatePublished - Dec 1 2008
EventProceedings of 18th Analysis and Computation Speciality Conference - Structures Congress 2008: Crossing the Borders - Vancouver, BC, Canada
Duration: Apr 24 2008Apr 26 2008

Other

OtherProceedings of 18th Analysis and Computation Speciality Conference - Structures Congress 2008: Crossing the Borders
CountryCanada
CityVancouver, BC
Period4/24/084/26/08

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • Safety, Risk, Reliability and Quality
  • Building and Construction

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