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oSIST prEN 1990-2:2024

(Main)

Eurocode - Basis of structural and geotechnical design - Part 2: Assessment of existing structures

Eurocode - Basis of structural and geotechnical design - Part 2: Assessment of existing structures

(1) This document provides provisions for the assessment of existing structures, including geotechnical structures, and the general principles for interventions, to be used in conjunction with prEN 1990-1.
NOTE This document is based on the general requirements and principles of structural reliability provided in prEN 1990-1.
(2) Unless otherwise specified, prEN 1990-1 applies.
(3) This document covers general principles regarding actions for assessment, complementing EN 1991 (all parts).
NOTE Provisions for seismic actions due to earthquake are provided in EN 1998-3.
(4) This document does not cover the design of new structural parts that will be integrated into an existing structure.
NOTE For the design of new structural parts, see prEN 1990-1.
(5) This document does not provide:
— specific rules for initiation of assessment;
— specific rules on how to undertake interventions that may be carried out as a result of an assessment;
— material-specific technical provisions for existing structures;
— provisions for seismic assessment and retrofitting of existing structures.
NOTE For provisions for seismic assessment and retrofitting of existing structures, see EN 1998-3.

Eurocode - Grundlagen der Planung von Tragwerken und geotechnischen Bauwerken - Teil 2: Bewertung von Bestandsbauten

Eurocodes - Bases de calcul structuraux et géotechniques - Partie 2: Évaluation des structures existantes

Evrokod - Osnove projektiranja konstrukcij in geotehničnega projektiranja - 2. del: Ocenjevanje in obnova obstoječih stavb

General Information

Status
Not Published
Public Enquiry End Date
29-Jun-2024
ICS
91.010.30 - Technical aspects
91.040.01 - Buildings in general
Technical Committee
KON - Structures
Current Stage
4020 - Public enquire (PE) (Adopted Project)
Start Date
04-Apr-2024
Due Date
22-Aug-2024
Ref Project
prEN 1990-2 - Eurocode - Basis of structural and geotechnical design - Part 2: Assessment of existing structures

Relations

Revises
SIST-TS CEN/TS 17440:2020 - Assessment and retrofitting of existing structures
Effective Date
26-Jul-2023

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SLOVENSKI STANDARD
oSIST prEN 1990-2:2024
01-junij-2024
Evrokod - Osnove projektiranja konstrukcij in geotehničnega projektiranja - 2. del:
Ocenjevanje in obnova obstoječih stavb
Eurocode - Basis of structural and geotechnical design - Part 2: Assessment of existing
structures
Eurocode - Grundlagen der Planung von Tragwerken und geotechnischen Bauwerken -
Teil 2: Bewertung von Bestandsbauten
Eurocodes - Bases de calcul structuraux et géotechniques - Partie 2: Évaluation des
structures existantes
Ta slovenski standard je istoveten z: prEN 1990-2
ICS:
91.010.30 Tehnični vidiki Technical aspects
91.040.01 Stavbe na splošno Buildings in general
oSIST prEN 1990-2:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1990-2:2024

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oSIST prEN 1990-2:2024


DRAFT
EUROPEAN STANDARD
prEN 1990-2
NORME EUROPÉENNE

EUROPÄISCHE NORM

March 2024
ICS 91.010.30 Will supersede CEN/TS 17440:2020
English Version

Eurocode - Basis of structural and geotechnical design -
Part 2: Assessment of existing structures
Eurocodes - Bases de calcul des structures et Eurocode - Grundlagen der Planung von Tragwerken
géotechniques - Partie 2: Évaluation des structures und geotechnischen Bauwerken - Teil 2: Bewertung
existantes von Bestandsbauten
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 250.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1990-2:2024 E
worldwide for CEN national Members.

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oSIST prEN 1990-2:2024
prEN 1990-2:2024 (E)
Contents Page

European foreword . 4
0 Introduction . 5
1 Scope . 7
2 Normative references. 7
3 Terms, definitions and symbols . 8
3.1 Terms and definitions . 8
3.2 Symbols and abbreviations . 9
3.2.1 Latin upper-case letters . 9
3.2.2 Latin lower-case letters . 10
3.2.3 Greek lower-case letters . 10
...

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1.1   Scope of CEN/TS 17440
(1)This document provides additional or amended provisions to EN 1990 to cover the assessment of existing structures (see EN 1990:2002, 1.1(4)), and the retained parts of existing structures that are being modified, extended, strengthened or retrofitted.
NOTE 1   The assessment of an existing structure is, in many aspects, different from the design of a new structure, see Introduction.
NOTE 2   There can be some aspects of EN 1990 that are required for design but are not applicable for assessment. The definition of those aspects of EN 1990 that are not applicable can be included in the definition of the assessment objectives and the approach to the assessment, see 5.
NOTE 3   This document is based on the general requirements and principles of structural reliability provided in Eurocodes EN 1990 and EN 1991.
(2) This document covers general principles regarding actions for assessment complementing EN 1991.
NOTE   Supplementary provisions for seismic actions due to earthquake are provided in EN 1998.
(3) This document includes general principles for the assessment of the structural resistance of existing structures.
NOTE   The specific models used to assess resistance are not provided in this document and will depend on the materials and structure types.
(4) This document does not provide specific rules for initiation of assessment.
(5) This document does not provide specific rules on how to undertake interventions that can be carried out as a result of an assessment.
(6) This document does not cover the design of new elements that will be integrated into an existing structure.
NOTE   For the design of new elements, see EN 1990.
1.2   Assumptions
(1) The general assumptions of CEN/TS 17440 are:
-   the assessment of the structure is made by appropriately qualified and experienced personnel;
-   adequate supervision and quality control is provided during the assessment process;
-   the structure will be used in accordance with the assessment assumptions;
-   the structure will be maintained in accordance with the assessment assumptions.

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(6) For barriers or walls having the function of barriers, horizontal forces are given in Section 6. Annex B gives additional guidance for vehicle barriers in car parks.
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(3) Methods for the assessment of the characteristic values of self-weight of construction works are given.
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-   garage and vehicle traffic areas (excluding bridges);
-   roofs;
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-   terraces and balconies.
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(5) Characteristic values of horizontal loads on parapets and partition walls acting as barriers are provided.
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1.2   Assumptions
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1.1   Scope of EN 19914
(1) EN 1991-4 provides guidance for calculating actions for the structural design of silos and tanks.
NOTE 1   Silos are used for the storage of particulate solids: tanks are used for the storage of liquids.
NOTE 2   For limitations on rules for silos given in this document, see 1.3.
NOTE 3   For limitations on rules for tanks given in this document, see 1.4.
(2) EN 1991 4 includes some provisions for actions on silo and tank structures that are not only associated with the stored solids or liquids (e.g. the effects of thermal differentials) but substantially affected by them.
NOTE   Liquid loads on tanks are very precisely defined. Many loads on silos are not known with great precision. This standard provides guidance for many practical situations for which very limited certain knowledge is available, and the information is derived from the limited experimental and analytical information available, coupled with conclusions drawn from failure investigations. The information is not based on a sound statistical treatment of experimental data.
(3) EN 1991 4 is intended for use with concrete, steel, aluminium, timber and FRP storage structures.
NOTE   FRP is the standard acronym for fibre reinforced polymer materials.
(4) EN 1991 4 may be used for the structural assessment of existing construction, in developing the design of repairs and alterations or for assessing changes of use.
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1.2   Assumptions
(1) The assumptions of EN 1990 apply.
(2) EN 1991 4 is intended to be used in conjunction with EN 1990, with the other parts of EN 1991, EN 1992, EN 1993, EN 1995, EN 1997, EN 1998 and EN 1999 where relevant to the design of silos and tanks.
1.3   Limitations on silos
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-   the silo here defined is either an isolated structure or can be part of a battery of silos. For a silo battery, the term silo is used throughout this standard to refer to a single cell within the battery;
-   the silo planform cross-section shapes are limited to those shown in Figure 1.1c.
NOTE 1   Minor variations to these shapes can be accepted provided the structural consequences of the resulting changes in pressure are expected to be considered. Further information concerning planform cross-section geometries is given in 7;
NOTE 2   Further information concerning planform cross-section geometries is given in Clause 7.
-   the relevant overall height of the silo hb (Figure 1.1a) is measured from the level of the equivalent surface of the stored solid (see 3.2.17) when the silo is filled to its maximum capacity, down to the apex of the cone of the hopper or to the flat base where there is no hopper;
NOTE   For the evaluation of ho to calculate hb, see (2).
-   the effective diameter dc of the silo should be determined as indicated in Figure 1.1c;
-   the following dimensional limitations on the overall height hb and aspect ratio hb/dc apply (see Figure 1.1):
hb/dc < 10   (1.1)
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dc < 60 m   (1.3)
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-   the relevant cylindrical section height of the silo hc (Figure 1.1a) should be measured from the level of the equivalent surface of the stored solid (see 3.2.17) when the silo is filled to its maximum capacity, down to the structural transition (see Figure 1.1a) or to the flat base where there is no hopper;
(2) For a symmetrically filled circular silo of diameter dc, h0 should be determined as:
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and for a symmetrically filled rectangular silo of characteristic dimension dc, h0 should be determined as:
   (1.5)
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These technical performance criteria and specifications are specifically applicable to the design, construction, refurbishment or adaptation, and maintenance of public or public-use environments including external areas.
Alternatively, national standards and regulations may determine the technical performance criteria and specifications to fulfil the functional requirements of EN 17210.
NOTE 1     Design for All and Universal Design share a similar inclusive design philosophy. Universal Design means the design of products, environments, programmes and services to be usable by all people, to the greatest extent possible, without the need for adaptation or specialized design. Universal Design shall not exclude assistive devices for particular groups of persons with disabilities where this is needed (UN CRPD).
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(1)This document provides additional or amended provisions to EN 1990 to cover the assessment of existing structures (see EN 1990:2002, 1.1(4)), and the retained parts of existing structures that are being modified, extended, strengthened or retrofitted.
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1.2   Assumptions
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-   Densities of construction materials and stored materials;
-   Self-weight of construction  works;
- Imposed loads for buildings.
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(6) For barriers or walls having the function of barriers, horizontal forces are given in Section 6. Annex B gives additional guidance for vehicle barriers in car parks.
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