Evolution of damage-induced nonlinearity in proximity of discontinuities in concrete

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:47

Article

Antonaci, P.¹  Bruno, C. L. E.¹  Gliozzi, A. S.²  Scalerandi, M.² 

[1] Politecn Torino, Struct & Geotech Engn Dept, Turin, Italy

[2] Politecn Torino, Dept Phys, Turin, Italy

关键词: Damage progression;    Nonlinear elasticity;    Preisach-Mayergoyz approach;    Scaling subtraction method;    Crack detection;    Concrete;   

DOI  :  10.1016/j.ijsolstr.2010.02.025

来源: Elsevier

【 摘 要 】

Understanding the mechanisms and modalities of damage progression close to discontinuities in solids, such as joints, is of great importance for applications in different fields. The interaction between damage and elasticity causes a nonlinear elastic response of the sample to a stress excitation (e.g. in the ultrasonic frequency range). Extracting physical or mechanical information on the sample properties from recorded ultrasonic signals requires a realistic model and an efficient detection method, as it will be discussed in this paper. We study here the successive phases that concrete samples with discontinuities enter by progressively increase the applied external load. Considerations on the mechanisms of damage progression are derived from experimental data using a Preisach-Mayergoyz space approach, developed in order to capture all the observed behaviors. (C) 2010 Elsevier Ltd. All rights reserved.

【 授权许可】

Free