Evaluation of the EC8-3 confidence factors for the characterization of concrete strength in existing structures. Materials and Structures

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Xavier Romão (Author) FEUP; Rui Gonçalves (Author) FEUP; Aníbal Costa (Author) FEUP; Raimundo Delgado (Author) FEUP

Journal

Title: Materials and Structures/Materiaux et Constructions

Vol. 5 No. 11

Pages: 1737-1758

ISSN: 1359-5997

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 11 Citations

ISI Web of Science

Scopus - 13 Citations

COMPENDEX

INSPEC

Scientific classification

FOS: Engineering and technology > Civil engineering

CORDIS: Technological sciences > Engineering > Civil engineering > Structural engineering

Other information

Authenticus ID: P-002-43J

DOI: 10.1617/s11527-012-9868-4

Abstract (EN): A probabilistic framework is defined to evaluate the values of the Confidence Factors (CFs) proposed in Eurocode 8 Part 3 (EC8-3) for the characterization of material properties. This evaluation is presented for the concrete compressive strength but its validity for other material properties can also be inferred from the results obtained. The number of material tests and the existence of prior knowledge are the essential aspects for the CF quantification. The probabilistic framework proposed in the first part of the study does not consider the existence of prior knowledge and is based on the concept of confidence intervals. In the second part of the study, the effects of prior knowledge are considered using a Bayesian framework. The combination of testing data obtained from different types of tests is also addressed as an extension of the referred Bayesian approach. Results indicate that the EC8-3 proposed CFs for KL1 and KL2 are adequate, but for KL3 it is suggested that a larger value should be used.

Language: English

Type (Professor's evaluation): Scientific