Evaluation of Aggregate Properties on Tension Softening Behavior of High-Strength Concrete

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Title: Evaluation of Aggregate Properties on Tension Softening Behavior of High-Strength Concrete

Author(s): Y. Sitsutaka, K. Kamimura, and S. Nakamura

Publication: Special Publication

Volume: 149

Issue:

Appears on pages(s): 711-728

Keywords: aggregates; cracking (fracturing); fracture mechanics; high-strength concretes; mix proportioning; models; tension; Structural Research

Date: 10/1/1994

Abstract:
The influence of aggregate properties on the tension-softening behavior of high-strength concrete was studied. A new method to determine the tension-softening curve of concrete is proposed, based on the polylinear approximation analysis. The prediction method for the load-displacement relationships of concrete with cracks is developed by means of the fictitious crack model concept with the K-superposition method and constitutive law with the polylinear tension-softening curve. In this method, nonlinear crack equations were solved by the iteration program for evaluating softening inclinations. The polylinear approximation method for calculating the complete tension-softening curve from the actual load-displacement curve was established by using nonlinear crack equation analysis. Tension-softening curves of concrete with various aggregates and matrix strengths were measured, and their characteristics were discussed.