A beam-end test is proposed in this paper and in the new fib Model Code 2020 to determine the effects of concrete type, confinement effects, and casting posi- tion on the anchorage strength of reinforcing bars. Two bars are cast in each specimen (in the two opposite corners), one in a “good” casting position and the other in “poor” casting position. The proposed test aims to be an economi- cal bond test capable to represent actual conditions of anchored bars in real design practice. The test is also intended to verify whether existing provisions for bond and anchorage in the fib Model Code are suitable in nonconventional concrete. The validity of the proposed beam end type bond test is assessed by the results of more 60 tests on rebars having anchorage length of about 20 times the bar diameter in plain concrete, in fiber reinforced concrete, and in recycled aggregate concrete. Experimental results provide information both on the “top cast effect” in three types of concrete and on the effectiveness of fib Model Code provisions for anchorage when nonconventional concrete is used.

A new fib Model Code proposal for a beam-end type bond test

Giovanni Metelli
;
Giovanni A. Plizzari
2023-01-01

Abstract

A beam-end test is proposed in this paper and in the new fib Model Code 2020 to determine the effects of concrete type, confinement effects, and casting posi- tion on the anchorage strength of reinforcing bars. Two bars are cast in each specimen (in the two opposite corners), one in a “good” casting position and the other in “poor” casting position. The proposed test aims to be an economi- cal bond test capable to represent actual conditions of anchored bars in real design practice. The test is also intended to verify whether existing provisions for bond and anchorage in the fib Model Code are suitable in nonconventional concrete. The validity of the proposed beam end type bond test is assessed by the results of more 60 tests on rebars having anchorage length of about 20 times the bar diameter in plain concrete, in fiber reinforced concrete, and in recycled aggregate concrete. Experimental results provide information both on the “top cast effect” in three types of concrete and on the effectiveness of fib Model Code provisions for anchorage when nonconventional concrete is used.
File in questo prodotto:
File Dimensione Formato  
Structural Concrete - 2023 - Metelli - A new fib Model Code proposal for a beam‐end type bond test.pdf

accesso aperto

Tipologia: Full Text
Licenza: PUBBLICO - Pubblico con Copyright
Dimensione 3.41 MB
Formato Adobe PDF
3.41 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/575505
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 4
social impact