Development and Implementation of Time-Dependent Cracking Material Model for Concrete

Abstract

Minimizing thermal cracking in mass concrete continues to be a concern. Thermal cracking is due to the restraint of volume change due to hydration, shrinkage, and creep. The mathematical prediction of stresses, strains, and cracking at early times presents special problems because many of the mechanical properties of concrete depend on the degree of hydration of the cementitious materials. To better model the time-dependent cracking properties and response of mass concrete, a time-dependent cracking material model was developed for use in a general-purpose heat transfer and structural analysis finite element code. The model includes the effects of time and temperature on compressive strength, modulus of elasticity, and creep. An interactive strain- driven, stress-modified cracking criterion based on the smeared-crack approach is included. Examples of calibration and verification of the model are included.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1991
Accession Number
ADA237416

Entities

People

  • Michael I. Hammons
  • Sharon B. Garner

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Army Corps Of Engineers
  • Birds
  • Compressive Strength
  • Construction
  • Creep
  • Elastic Properties
  • Heat Transfer
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Plastic Properties
  • Stress Analysis
  • Stresses
  • Structural Analysis
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Engineering
  • Materials science

Readers

  • Computational Modeling and Simulation
  • Mechanical Engineering/Mechanics of Materials.
  • Pavement Materials Engineering.