Structural Evaluation of Concrete Slabs Using Falling Weight Deflectometer Results

Abstract

This report describes procedures for evaluating the results from non- destructive tests (NDT) to determine the properties of a concrete slab so that its load carrying capacity can be evaluated. The procedure is based on measuring the response of a slab to impulse type load (Falling Weight) and back calculating slab support conditions and slab stiffness. Slab stiffness is a combination of the modulus of the slab material and slab thickness. If one of these two properties is known or can be estimated, the other can be calculated directly. The procedure, based on medium thick plate theory, is mathematically rigorous and relies on closed form solution to elastic plate theory. Support conditions can be expressed in terms of either a Winkler type foundation (dense liquid) or as an elastic solid. An example use for this procedure is to check the effective thickness of newly constructed slabs without the necessity of coring the slabs. Keywords: Structural evaluation, Falling weight deflectometer.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1989
Accession Number
ADA214016

Entities

People

  • Anastasos M. Ioannides
  • Ernest J. Barenberg

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Civil Engineering
  • Classification
  • Cold Regions
  • Composite Materials
  • Computer Programs
  • Construction
  • Destructive Tests
  • Engineering
  • Illinois
  • Materials
  • Military Research
  • Modulus Of Elasticity
  • New Hampshire
  • Payload
  • Test And Evaluation
  • United States
  • Universities

Fields of Study

  • Engineering

Readers

  • Fluid Dynamics.
  • Pavement Materials Engineering.
  • Theoretical Analysis.