Assessment of construction joint effect in full-scale concrete beams by acoustic emission activity

Dimitrios G. Aggelis, Tomoki Shiotani, Masato Terazawa

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

In the present paper the mechanical and acoustic emission (AE) behaviors of full-scale reinforced concrete beams are evaluated. One of the beams was constructed in two parts, which were assembled later in order to evaluate the effect of the joints in the structural behavior. The load was applied by means of a four-point-bending configuration. It is revealed that at initial stages of loading, the conventional measurements of strain and deflection, as well as pulse velocity, do not show any discrepancy, although the structural performance of the two beams is eventually proven to be quite different. On the contrary, AE parameters, even from early load steps, indicate that the damage accumulation is much faster in the assembled beam. This is confirmed by the calculated sources of AE events which are close to the construction joints. The results show that the AE technique is suitable to monitor the deterioration process of full-scale structures and yields valuable information that cannot be obtained at the early stages of damage by any other way.

Original languageEnglish
Article number012007QEM
Pages (from-to)906-912
Number of pages7
JournalJournal of engineering mechanics
Volume136
Issue number7
DOIs
Publication statusPublished - 1 Jul 2010

Keywords

  • Acoustic methods
  • Concrete beams
  • Cracking
  • Fracture
  • Load bearing capacity
  • Reinforcement

Fingerprint

Dive into the research topics of 'Assessment of construction joint effect in full-scale concrete beams by acoustic emission activity'. Together they form a unique fingerprint.

Cite this