Fracture-based method to determine flexural capacity of concrete beams on soil

Cristian Gaedicke, Jeffery Roesler

Research output: Contribution to journalArticlepeer-review

Abstract

A method to predict the fracture response of concrete beams utilizing cohesive crack elements was expanded from a three-point bending beam to a beam on soil boundary condition. The simulations were compared with monotonie three-point bending beam and beam on soil tests, verifying the cohesive elements with a bilinear softening curve defined by the concrete's fracture and tensile strength properties can effectively predict the flexural capacity and post-peak behavior of both specimen configurations. Vertical and horizontal springs idealized the soil support to the beams. Whether the springs were linear or nonlinear elastic had a limited effect on the peak load capacity of the concrete beams on soil. At prepeak and peak load levels, the two concrete beam configurations had similar stress patterns and crack propagation levels In spite of the different boundary conditions. The method simplicity and accuracy under different boundary conditions offers a promising approach that can be extended to predicting the flexural capacity of concrete slabs.

Original languageEnglish (US)
Pages (from-to)361-385
Number of pages25
JournalRoad Materials and Pavement Design
Volume11
Issue number2
DOIs
StatePublished - Apr 1 2010

Keywords

  • Beams on elastic foundation
  • Cohesive crack model
  • Concrete fracture
  • Three point bending beams

ASJC Scopus subject areas

  • Civil and Structural Engineering

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