Size Effect in Concrete Structures Without Initial Crack

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Title: Size Effect in Concrete Structures Without Initial Crack

Author(s): Jin-Ken Kim, Seok-Hong Eo, and Hong-Kee Park

Publication: Special Publication

Volume: 118

Issue:

Appears on pages(s): 179-196

Keywords: compressive strength; concretes; cracking (fracturing); dimensional analysis; fracture properties; models; regression analysis; shear strength; splitting tensile strength; Structural Research

Date: 1/1/1990

Abstract:
In most of the structural members with initial cracks, the strength tends to decrease as the member size increases. This phenomenon is known as size effect. Among the structural materials of glass, metal, or concrete, etc., concrete represents the size effect even without initial crack. According to the previous size effect law, the concrete member of very large size can resist little stress. Actually, however, even the large-size member can resist some stress if there is no initial crack. In this study, the empirical models for uniaxial compressive strength that are derived based on nonlinear fracture mechanics are proposed by the regression analysis with the existing test data of large-size specimens.