Six-Steps Process of Structural Assessment of Heritage Timber Structures: Definition Based on the State of the Art
Abstract
:1. Introduction
2. Review of Papers
2.1. Introduction
2.2. Reviewed Papers
3. Review on Existing Codes, Guidelines and Standards
3.1. Introduction
- if the approach to the conservation is for any kind of construction material or specific for timber (respectively “A” or “T” under “Material”)
- if the approach to the conservation is for heritage or non-heritage structures (respectively “H” or “N” under “Material” and “Timber”)
- if the contents are qualitative or quantitative
- the content of each of the steps of the proposed assessment process.
3.2. ICOMOS/ISCARSAH Charters and Guidelines
3.3. The European Standard ISO 13822:2010
3.4. National Standards UNI, SIA and DIN
3.5. Proposal for the New European Technical Rules for Assessment and Retrofitting of Existing Structures
3.6. EN 17121:2019
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Reference Nr. | First Author/Title/Publication Year | Timber Topic | Content Related to the Assessment Process | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Heritage/Traditional | Engineered | Step 1 | Step 2 | M1 | Step 3 | Step 4 | M2 | Step 5 | Step 6 | M3 | ||
[1] | S.H. e.V./Leitfaden zu einer ersten Begutachtung von Hallentragwerken aus Holz/2018 | X | 1 | 2 | 3 | |||||||
[2] | Dietsch/Assessment of Timber Structures. Report of the COST Action E55 “Modelling of the Performance of Timber Structures”/2010 | X | 1 | M1 | 3 | 4 | M2 | M3 | ||||
[3] | Diamantidis/Probabilistic Assessment of Existing Structures/2001 | X | 1 | M1 | 4 | M2 | M3 | |||||
[4] | Lißner/Holzbausanierung—Grundlagen und Praxis der sicheren Ausführung/2000 | X | 1 | 6 | M3 | |||||||
[5] | Cruz/Guidelines for on-site assessment of historic timber structures/2015 | X | 1 | 2 | M1 | 3 | M2 | 6 | ||||
[6] | Macchioni/Review of Codes and Standards/2010 | X | 2 | M1 | 3 | |||||||
[7] | Lißner/Ergänzende Erläuterungen für Bauen im Bestand/2005 | X | 2 | 3 | 4 | 5 | 6 | M3 | ||||
[8] | Rug/Erneuerung von Fachwerkbauten/2004 | X | 2 | 5 | 6 | |||||||
[12] | CEN/EN 1912:2012. Structural Timber—Strength classes—Assignment of visual grades and species/2012 | X | 3 | |||||||||
[13] | JCSS/Probabilistic Model Code, Part III, Timber/2001 | X | 4 | |||||||||
[11] | WTA/Merkblatt E-7-2. Historische Holzkonstruktionen: Zustandsermittlung und Beurteilung der Tragfähigkeit geschädigter und verformter Holzkonstruktionen/2018 | X | 1 | 2 | 3 | 4 | ||||||
[14] | Holzer/Statische Beurteilung historischer Tragwerke Band 2, Holzkonstruktionen/2005 | X | 4 | |||||||||
[15] | ARGEBAU/Hinweise und Beispiele zum Vorgehen beim Nachweis der Standsicherheit beim Bauen im Bestand/2008 | 4 | ||||||||||
[16] | Lißner/Modernisierung von Altbauten/2001 | X | 5 | 6 | M3 | |||||||
[9] | D’Ayala/Assessment, reinforcement and monitoring of timber structures: COST action FP1101/2014. | X | 2 | M1 | 3 | 6 |
Material | Timber | Norm/Guideline | Step 1 | Step 2 | Step 3 | |||||
---|---|---|---|---|---|---|---|---|---|---|
H | N | H | N | Qualitative | Quantitative | Qualitative | Quantitative | Qualitative | Quantitative | |
T | x | ICOMOS 2017 | x | x | x | |||||
Point 21: definition of the original structural principles | Point 1: record the structural and architectonical condition of the structure | Point 2: accurate diagnosis of the physical conditions using NDT testing | ||||||||
A | ICO-MOS 2003 | x | x | |||||||
Section 2 | Section 2 | |||||||||
A, T | x | ICO-MOS 2014 | x | x | x | |||||
Sections 2.1 and 2.2— “Pre-survey” | Section 2.3 | Sections 2.3 and 2.4.—Improvement by monitoring phase | ||||||||
A | A | ISO 13822:2010 | x | x | x | x | ||||
Section 4.5.1.— Study of documents and other evidence | Section 4.5.—“Preliminary assessment” | Sections 4.6.2. and 4.6.3.; Section 5 —method of assessment; Annex D Assessment of actual mechanical properties | Annex C—Assessment in terms of probabilistic methods and estimated reliability | |||||||
T | x | ISO 13822: 2010-ANNEX I | x | x | x | |||||
I.4.5.2.to I.4.5.4— Historical report, detailed documental search and review, heritage record | Section I.4.4—Importance of samples collection according with cultural heritage management authorities | Sections I.4.5. and I.4.5.5. to I.4.5.8—samples collection according with cultural heritage management authorities | ||||||||
T | x | UNI ISO 11119:2004 | x | x | x | x | ||||
Section 7.1 to 7.4 —Identify wooden specie and local/global moisture content | Reference: UNI 11118, UNI EN 335 | Section 7.5 to 7.6—Grading of wood (growth characteristics) | Table 1, 2—Gra-ding of structural elements; Appendix A—Common wooden species and visual grading classes | |||||||
T | x | UNI ISO 11138:2004 | x | x | x | x | ||||
Section 4.2— “Historical survey” | Section 4.3 and 4.4—"Material characterization" and "geometric survey" | Reference: UNI 11118, UNI 11119 and UNI EN 335 | Section 4.5—"Characterization of the decay" | |||||||
T | x | x | SIA 269/5:2011 | x | x | x | ||||
Section 5— Structural survey | Annex C.2—Pro- cedures and tools for the assessment; Section 6—Use classes. Reference: SIA 265:2003, SIA EN 335-2 | Annex C3—Common decay in wooden connections; Annex D—tables from EMPA/LIGNUM | ||||||||
T | x | x | DIN EN 1995-1-1/ NA: 2013-08 | |||||||
A | A | NEW EUROPEAN TECHNICAL RULES FOR […] EXISTING STRUCTURES | x | x | ||||||
Part III, Section 3.2— “Generic procedure”; Section 3.3— “Preliminary assessment”. | Part III, Section 3.4 “detailed assessment”; Section 4 “investigation and updating information”; Section 4.3 “Material properties” (Ref: EN 1991 to 1999), Section 4.3.2 “Sampling and material testing”; Section 4.4 “Geometrical properties”. | |||||||||
T | x | EN 17121:2019 | x | x | x | x | x | |||
Section 4—Preliminary assessment (including 4.2 “desk survey” and 4.3 “historical analysis”) | Section 4—Preliminary assessment including 4.5 “preliminary visual survey” and “measured survey” | Annex A—Tools for inspection briefly described | Section 5.5—Principles of timber grading; Section 5.7—Assessment of timber joints characteristics | Common joint’s failure modes, Reference: EN 138183-2 and 3, EN 14081-1:2016, Annex A. |
Mate-rial | Timber | Norm/Guideline | Step 4 | Step 5 | Step 6 | |||||
---|---|---|---|---|---|---|---|---|---|---|
H | N | H | N | Qualitative | Quantitative | Qualitative | Quantitative | Qualitative | Quantitative | |
T | x | ICOMOS 2017 | x | x | x | |||||
Point 19: performance over the centuries and structural changes; Point 20: Adequate structural calculation | Points 23–25: taking care of modernization methods in order to take care of the pre-existing heritage structure. | Point 10–12: minimal, reversible intervention with traditional techniques; 21: basing interventions on future use; 23—Importance of compatibility and durability of new materials; 29–31: Monitoring | ||||||||
A | ICO-MOS 2003 | x | x | |||||||
Section 2 | General concept of proposal for interventions | |||||||||
A, T | x | ICO-MOS 2014 | x | x | ||||||
Section 3 | 3.4—actions on structures and materials | |||||||||
A | A | ISO 13822:2010 | x | x | x | |||||
Section 4.6.3.–4.6.6.; Section 6 and 7—Generation of a suitable structural model. Reference: ISO 2394:1915 | Annex E: Time-dependent and Annex F: Target reliability level | Sections 9 and 10; Annex H (Methods of Upgrading) | ||||||||
T | x | ISO 13822: 2010—ANNEX I | x | x | x | |||||
Sections I.4.5.11 and I.6—care for development of structural model; Section 4.6.5 and 6.1 – Requirements on models. | Section I.2—Fundamentals for the assessment of heritage structures, in general Annex I | Section I.9—Minimal intervention, incremental approach, removable measures. | ||||||||
T | x | UNI ISO 11119: 2004 | x | x | x | |||||
Reference: UNI EN 518 (replaced by EN 14081) | Reference: UNI EN 1995-1-1 | Section 6—Limits of the norm | ||||||||
T | x | UNI ISO 11138:2004 | x | x | x | x | x | |||
Section 4.6 and 4.7—“Structural analysis” and “presentation of results” | Reference: UNI EN 1995-1-1, DIN EN 1991-1-1, DIN EN 1998-1 | Introduction; Section 0—Special compatibility requirements of the heritage | Section 5—Description of criteria for design of interventions. Requirements for preliminary, definitive and executive project. | Reference: UNI 8662-2:1988 | ||||||
T | x | x | SIA 269/5:2011 | x | x | x | ||||
Section 4— Evidence of load-carrying capacity, serviceability and connections | Annex B—Definition of load-carrying capacity of wood-wood connections with wooden fasteners; Annex A—Ref: SIA164:1953 and SIA 164:1992 | Reference: EMPA/LIGNUM-Guideline, SIA 269, SIA 269/1 and SIA 265. | ||||||||
T | x | x | DIN EN 1995-1-1/ NA: 2013-08 | x | ||||||
Section NA 12.1—Double step joint; Section NA 12.2—Notched connect; Section NA 12.3 Nailed connection. | ||||||||||
A | A | NEW EUROPEAN TECHNICAL RULES FOR […] EXISTING STRUCTURES | x | x | x | x | x | |||
Part III, Section 3.4.6—Structural analysis; Section 4.2—“Actions” (Reference: EN 1990), Section 5—“Structural analysis and verification” | Reference: ISO 13822:2010, ISO 2394:2013, JCSS PROBABILISTIC MODEL CODE | Part III, Section 1.1— Document does “not cover assessment related to special performance requirements of the client related to property protection”. | Part III, Section 6—“Interventions”; Section 6.3— “Survey and monitoring maintenance” | Reference: S&P reports for EN 1992 to EN 1999. | ||||||
T | x | EN 17121:2019 | x | x | ||||||
Section 4.6—Structural analysis; Section 5.7—Tool for understanding /modeling of joints. | Introduction |
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Perria, E.; Sieder, M. Six-Steps Process of Structural Assessment of Heritage Timber Structures: Definition Based on the State of the Art. Buildings 2020, 10, 109. https://doi.org/10.3390/buildings10060109
Perria E, Sieder M. Six-Steps Process of Structural Assessment of Heritage Timber Structures: Definition Based on the State of the Art. Buildings. 2020; 10(6):109. https://doi.org/10.3390/buildings10060109
Chicago/Turabian StylePerria, Elena, and Mike Sieder. 2020. "Six-Steps Process of Structural Assessment of Heritage Timber Structures: Definition Based on the State of the Art" Buildings 10, no. 6: 109. https://doi.org/10.3390/buildings10060109