Rehabilitation and strengthening of/with timber solutions - Conception and design

Recommended Prerequisites

EC5 I (designation to be defined), Inspection and Durability in Timber Construction.

Teaching Methods

Presential or online lectures, with pre-availability of the support documentation, solving of design examples and, when needed and feasible, with small practical demos of devices or techniques. The evaluation will be based on tests (60%) and problem solving report (40%).

Learning Outcomes

The need for corrective interventions of patologies or deficiencies in timber constructions occurs both in ancient constructions, either classified or not, and contemporary constructions. The former were built according to ancestral or recognised rules of good timber construction practice, while the latter were executed under the frame of specific codes and standards (namely EC5). Time depletion or the insufficient maestry of the design principles often result in the occurrence of patologies whose solution requires, depending on the specific case, an integrated approach of traditional practices and systems with the design procedures in force, having in mind that replacing or reconstruction systems should take them into account. This unit seeks to cover these diverse repair/rehabilitation situations. 

Work Placement(s)

No

Syllabus

Standards on rehabilitation of timber structures (UNI 11118, UNI 11138, UNE 41805): provisions related to conception and design.

Actions.

Mechanical characteristics of the materials.

Structural analysis.

Possible rehabilitation solutions:

  Full replacement

  Partial replacement

  Change in the structural system

  Glued connections

  Mechanical connections

  Prestress

  Composite structures (timber-steel, timber-concrete)

  Reinforcement with FRP fabrics or laminates

  Prosthesis and splices made up with epoxy resins or mortars

Calculation examples.

Case study.

Assessment Methods

Assessment
Resolution Problems: 40.0%
Mini Tests: 60.0%

Bibliography

Vários autores. STEP 1 - Timber Engineering. Centrum Hout, The Netherlands, 1995, ISBN 90-5645-001-8

F. Arriaga; F. Peraza, M. Esteban, I. Bobadilla, F. Garcia. Intervencion en Estructuras de Madera. Ed. AITIM, Madrid, Espanha, 2002, ISBN 84-87381-24-3

A. Dias, H. Cruz, J.S. Machado, J. Custódio, P. Palma. Avaliação, Conservação e Reforço de Estruturas de Madeira. Verlsag-Dashofer, 2009, Lisboa, Portugal, ISBN 978-989-642-065-9

Negrão, J., Faria, A.. Projecto de Estruturas de Madeira, Publindústria, Porto, 2009

UNE 41805 (14 partes) - Diagnóstico de Edifícios, AENOR, 2009

UNI 11119 - Beni culturali-Manufatti lignei-Strutture portanti degli edifici - Ispezione in situ  per la diagnosi degli elementi in opera, UNI, 2004

UNI 11138 - Beni culturali-Manufatti lignei-Strutture portanti degli edifici - Criteri per la valutazione preventiva, la progettazione e l’esecuzione di interventi, UNI, 2004

Normas Europeias diversas.