Accession Number:

ADA237416

Title:

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

Descriptive Note:

Final rept.

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS STRUCTURES LAB

Report Date:

1991-04-01

Pagination or Media Count:

120.0

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.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Numerical Mathematics
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE