CTE Eventi

The program

CACRCS 2023

Capacity assessment of corroded reinforced concrete structures: from research to daily engineering evaluation

Old reinforced concrete structure with damaged and rusty metallic reinforcement bars.
the Program 2023

Preliminary Program

Special sessions are organised during the workshop. Authors are   invited to kindly select the session at which they will present their papers. Each session will include both research and engineering applications focussing on what is needed for the evaluation of corroded structures.

CACRCS DAYS 2023 includes a Round table to promote discussions.

The workshop offers didactic material for engineers, practitioners, scientists, concrete technologists, researchers, and academics to further knowledge about corrosion of reinforced concrete structures.

WEDNESDAY 13 SEPTEMBER

Welcome and Introduction

B. Belletti, D. Coronelli, Coordinator Event
Enrico Nusiner, CTE President
David Fernández-Ordóñez, fib Secretary General
Luc Taerwe, Editor-in-Chief of Structural Concrete

KEY-NOTE LECTURES

Jesús Rodríguez, UPM, Chairman of the Spanish Mirror Group Eurocode 2, Spain
“New version of Eurocode 2: what is covered for the evaluation of existing concrete structures and how to be enlarged for the structural evaluation of the corroded concrete ones”

Alberto Gennari Santori, ANAS S.p.a. – Centro Sperimentale Stradale di Cesano, Italy
“Identification and evaluation of defects in post-tensioned cables of prestressed concrete bridges”

A1) Derivation of reliable material models for the analysis of corroded structures

The Session deals with the critical revision or the promotion of databases and experimental results coming from corroded elements by referring to accelerated tests, corrosion under natural environment, and the use of empirical expressions adjusted to experimental results.

KEY-NOTE LECTURES

Els Verstrynge, KU Leuven University, Belgium
“Overview of experimental approaches and reliability of empirical relations for rebar corrosion assessment”

Veronique Bouteiller, Université Gustave Eiffel, France
Corrosion of reinforced concrete: results from accelerated tests and under natural environment

A2) Models for deteriorated materials: constitutive relationships to be implemented in structural models

The Session deals with models for deteriorated materials such as:

Reinforcing and prestressing steel, by considering:

  • cross section reduction (homogeneous or pitting corrosion)
  • strain reduction at maximum load
  • definition of stress-strain relationships

Concrete, by considering:

  • cracking
  • compressive strength reduction due to different factors, such as cracking
  • cross section reduction due to different factors, such as spalling

Bond, by considering:

  • Maximum bond strength
  • bond-slip relationships
  • anchoring in reinforcing bars (plain and ribbed)
  • transfer length and anchorage of prestressing steel

KEY-NOTE LECTURES

Yasushi Tanaka, Kanazawa Institute of Technology, Japan
“An experimental and numerical study on remaining strength of corroded prestressed concrete girder”

Alberto Meda, University Tor Vergata, Zila Rinaldi, University Tor Vergata, Anna Saetta, IUAV, Italy
“Design relationships for corroded steel rebars”

corrosione2

THURSDAY 14 SEPTEMBER

B1) Analytical models the capacity assessment of corroded members

The Session investigates the suitability of models for new structures when applied to the evaluation of existing corroded structures. The Session deals with the modification or the improvement of existing models, based on a-priori hypothesis for new structures to be applied for the capacity evaluation of existing corroded structures

Particular attention will be focused on:

  • The structural analysis: linear elastic analysis with limited redistribution, plastic analysis, and non-linear analysis.
  • The capacity assessment of reinforced concrete and prestressed concrete members, such as beams, columns, slabs, and/or walls by referring on both serviceability and ultimate limit states and taking into account problems related to the spatial variability of the damage induced by corrosion.
  • The assessment of corroded concrete members at ultimate limit states by strut-and-tie models

KEY-NOTE LECTURES

Weiping Zhang, Tongji University, China
“Assessment of fatigue behavior of corroded prestressed concrete beams”

Walter Kaufmann, ETH, Switzerland
“Capturing the global structural impact of local corrosion”

Raoul François, LMDC, INSA, UPS, Université de Toulouse, France, Rached El Fatmi, ENIT, Université El Manar de Tunis, Tunisie, David Garcia, Corrohm, Labège, France, Erick Ringot, LMDC, INSA, UPS, Université de Toulouse, France
«Mechanical re-calculation of reinforced concrete structures taking into account load-redistribution due to both load-induced cracks and corrosion of reinforcement»

B2) NLFE models for the capacity assessment of corroded members

The Session deals with the Non-Linear Finite Element Modelling of corroded RC and PC structures. Particular attention will be focused on the calibration of the NLFEM on the basis of reliable test results and reliable input values of material characteristics.

KEY-NOTE LECTURES

Beatriz Martín-Pérez, University of Ottawa, Canada
“Numerical modelling of structural concrete members subjected to reinforcement corrosion”

Joško Ožbolt, University of Stuttgart, Germany
“Corrosion of steel reinforcement in concrete: 3D FE modelling & on situ structural measurements”

Hikaru Nakamura, Nagoya University, Japan
“Advanced nonlinear analysis model, Rigid Body Spring Method – Simulation from corrosion crack to bond and structural performance with corroded rebar“

Diego Allaix, TNO, The Netherlands
“Data-informed and NLFEM-based assessment of concrete structures with corroded reinforcement: challenges and perspectives for future standardisation”

FRIDAY 15 SEPTEMBER

C1) Long-term behaviour of corroded concrete structures and determination of the residual service life

The Session deals with the extension of models for the evaluation of the present condition of structural elements or corroded structures to predict the long-term behaviour and remaining service life. Particular attention should be focused on the appropriate prediction of corrosion rate values.

KEY-NOTE LECTURES

Sylvia Kessler, Helmut-Schmidt-University, Germany
“Reliability of corrosion detection and its effect on service life prediction”

Dan M. Frangopol, Lehigh University, Pennsylvania, USA, Mitsuyoshi Akiyama, Waseda University, Japan
“Life-cycle performance assessment of corroded RC structures using machine learning, experimental evidence, probabilistic analysis and finite element method”

C2) Upgrading of deteriorated structures by reactive and proactive interventions

The Session deals with the analysis of the prolongation of the residual life by reactive and proactive interventions of repairing and strengthening.

KEY-NOTE LECTURES

Takumi Shimomura, Nagaoka University of Technology, Japan
“Research and practice in Japan on evaluation of performance of existing concrete structures before and after intervention”

Fabio Biondini, Politecnico di Milano, Italy and Michel Ghosn, The City College of New York / CUNY, USA
“Effect of Climate Change on Life-Cycle Performance, Safety, Reliability, and Risk of Structures and Infrastructure Systems: A SEI/ASCE Project”

17.30 - Round table on identifying the technical gaps for the structural evaluation of corroded concrete structures for future guidelines and code on short and long-term assessment of corroded structures

Since the main objective of this workshop is to move from research to daily engineering evaluation, this final Round Table aims to exchange some views and comments on the pending technical gaps for the structural evaluation of corroded concrete structures, in spite of the contributions to this workshop, in order to promote some guidelines and codes.

CHAIR: Joost Walraven, Em. TU Delft