1、 Reference number ISO 13822:2010(E) ISO 2010INTERNATIONAL STANDARD ISO 13822 Second edition 2010-08-01 Bases for design of structures Assessment of existing structures Bases du calcul des constructions valuation des constructions existantes ISO 13822:2010(E) PDF disclaimer This PDF file may contain
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6、requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedISO 13822:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword .v Introductionvi 1
7、Scope1 2 Normative references1 3 Terms and definitions .2 4 General framework of assessment3 4.1 Objectives 3 4.2 Procedure.4 4.3 Specification of the assessment objectives.5 4.4 Scenario5 4.5 Preliminary assessment .5 4.6 Detailed assessment.6 4.7 Results of assessment7 5 Data for assessment .7 5.1
8、 General .7 5.2 Actions and environmental influences .7 5.3 Material properties 8 5.4 Properties of the structure .8 5.5 Dimensions 8 6 Structural analysis 9 6.1 Models 9 6.2 Limit states.9 6.3 Basic variables 9 6.4 Model uncertainties.9 6.5 Conversion factors9 6.6 Uncertainty about the condition of
9、 components .9 6.7 Deterioration models.9 7 Verification .10 7.1 Bases 10 7.2 Reliability assessment10 7.3 Limit states.10 7.4 Plausibility check 10 7.5 Target reliability level10 8 Assessment based on satisfactory past performance10 8.1 Assessment of safety10 8.2 Assessment of serviceability .11 9
10、Interventions 11 10 Report .11 10.1 General .11 10.2 Conclusions .11 10.3 Sufficient reliability .11 10.4 Insufficient reliability.12 10.5 Recommendations for interventions.12 10.6 Inspection and maintenance plan12 10.7 Documented information12 10.8 Reporting style 12 ISO 13822:2010(E) iv ISO 2010 A
11、ll rights reserved11 Judgement and decision.12 11.1 Decision 12 Annex A (informative) Hierarchy of terms 13 Annex B (informative) Flowchart for the general assessment of existing structures .14 Annex C (informative) Updating of measured quantities15 Annex D (informative) Testing for static and dynam
12、ic properties of structures 21 Annex E (informative) Assessment of time-dependent reliability24 Annex F (informative) Target reliability level28 Annex G (informative) Test report format.30 Annex H (informative) Design of upgrading .33 Annex I (informative) Heritage structures.35 Bibliography 44 ISO
13、13822:2010(E) ISO 2010 All rights reserved vForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each membe
14、r body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Elec
15、trotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopt
16、ed by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of paten
17、t rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 13822 was prepared by Technical Committee ISO/TC 98, Bases for design of structures, Subcommittee SC 2, Reliability of structures. This second edition cancels and replaces the first edition (ISO 13822:2001
18、), which has been technically revised, including the addition of a new Annex I, the associated change to the Foreword and with some minor editorial changes. ISO 13822:2010(E) vi ISO 2010 All rights reservedIntroduction The continued use of existing structures is of great importance because the built
19、 environment is a huge economic and political asset, growing larger every year. The assessment of existing structures is now a major engineering task. The structural engineer is increasingly called upon to devise ways for extending the life of structures whilst observing tight cost constraints. The
20、establishment of principles for the assessment of existing structures is required because it is based on an approach that is substantially different from design of new structures and requires knowledge beyond the scope of design codes. This document is intended not only as a statement of principals
21、and procedures for the assessment of existing structures but also as a guide for use by structural engineers and clients. Engineers can apply specific methods for assessment in order to save structures and to reduce a clients expenditure. The ultimate goal is to limit construction intervention to a
22、strict minimum, a goal that is clearly in agreement with the principles of sustainable development. The basis for the reliability assessment is contained in the performance requirements for safety and serviceability of ISO 2394. Economic, social and sustainability considerations, however, result in
23、a greater differentiation in structural reliability for the assessment of existing structures than for the design of new structures. INTERNATIONAL STANDARD ISO 13822:2010(E) ISO 2010 All rights reserved 1Bases for design of structures Assessment of existing structures 1 Scope This International Stan
24、dard provides general requirements and procedures for the assessment of existing structures (buildings, bridges, industrial structures, etc.) based on the principles of structural reliability and consequences of failure. It is based on ISO 2394. It is applicable to the assessment of any type of exis
25、ting structure that was originally designed, analysed and specified based on accepted engineering principles and/or design rules, as well as structures constructed on the basis of good workmanship, historic experience and accepted professional practice. The assessment can be initiated under the foll
26、owing circumstances: an anticipated change in use or extension of design working life; a reliability check (e.g. for earthquakes, increased traffic actions) as required by authorities, insurance companies, owners, etc.; structural deterioration due to time-dependent actions (e.g. corrosion, fatigue)
27、; structural damage by accidental actions (see ISO 2394). This International Standard is also applicable to heritage structures provided additional considerations shown in Annex I are taken into account. This International Standard is applicable to existing structures of any material, although speci
28、fic adaptation can be required depending on the type of material, such as concrete, steel, timber, masonry, etc. This International Standard provides principles regarding actions and environmental influences. Further detailed considerations are necessary for accidental actions such as fire and earth
29、quake. NOTE Fire resistance requires properties different from those for structural safety and integrity. Also fire hazards can be created by change in use. Special requirements are necessary for seismic hazards taking the dynamic action and structural response into account. This International Stand
30、ard is intended to serve as a basis for preparing national standards or codes of practice in accordance with current engineering practice and the economic conditions. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated reference
31、s, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 2394:1998, General principles on reliability for structures ISO 13822:2010(E) 2 ISO 2010 All rights reserved3 Terms and definitions For the purposes of thi
32、s document, the terms and definitions given in ISO 2394 and the following apply. NOTE See also Annex A. 3.1 assessment set of activities performed in order to verify the reliability of an existing structure for future use 3.2 damage unfavourable change in the condition of a structure that can affect
33、 structural performance 3.3 deterioration process that adversely affects the structural performance, including reliability over time due to naturally occurring chemical, physical or biological actions, repeated action such as those causing fatigue normal or severe environmental influences wear due t
34、o use, or improper operation and maintenance of the structure. 3.4 deterioration model mathematical model that describes structural performance as a function of time, taking deterioration into account 3.5 inspection on-site non-destructive examination to establish the present condition of the struct
35、ure 3.6 investigation collection and evaluation of information through inspection, document search, load testing and other testing 3.7 load testing test of the structure or part thereof by loading to evaluate its behaviour or properties, or to predict its load bearing capacity 3.8 maintenance routin
36、e intervention to preserve appropriate structural performance 3.9 material properties mechanical, physical or chemical properties of structural materials 3.10 monitoring frequent or continuous, normally long-term, observation or measurement of structural conditions or actions ISO 13822:2010(E) ISO 2
37、010 All rights reserved 33.11 reference period chosen period of time which is used as a basis for assessing values of variable actions, time-dependent material properties, etc. NOTE The remaining working life or the minimum standard period for safety of an existing structure can be taken as a refere
38、nce period (see Annex F). 3.12 rehabilitation work required to repair, and possibly upgrade, an existing structure 3.13 remaining working life period for which an existing structure is intended/expected to operate with planned maintenance 3.14 repair, verb improve the condition of a structure by res
39、toring or replacing existing components that have been damaged. 3.15 safety plan plan specifying the performance objectives, the scenarios to be considered for the structure, and all present and future measures (design, construction, or operation such as monitoring) to ensure the safety of the struc
40、ture 3.16 structural performance qualitative or quantitative representation of the behaviour of a structure (e.g. load bearing capacity, stiffness) in terms of its safety and serviceability 3.17 target reliability level level of reliability required to ensure acceptable safety and serviceability 3.1
41、8 upgrading modifications to an existing structure to improve its structural performance 3.19 utilization plan plan containing the intended use (or uses) of the structure, and listing the operational conditions of the structure including maintenance requirements, and the corresponding performance re
42、quirements 4 General framework of assessment 4.1 Objectives The objective of the assessment of an existing structure in terms of its required future structural performance shall be specified in consultation with the client (the owner, the authority, insurance companies, etc.) based on the following
43、performance levels: a) safety performance level, which provides appropriate safety for the users of the structure; b) continued function performance level, which provides continued function for special structures such as hospitals, communication buildings or key bridges in the event of an earthquake
44、, impact, or other foreseen hazard; ISO 13822:2010(E) 4 ISO 2010 All rights reservedc) special performance requirements of the client related to property protection (economic loss) or serviceability. The level of this performance is generally based on life cycle cost and special functional requireme
45、nts. 4.2 Procedure The procedure depends on the assessment objectives (see 4.1), and on specific circumstances (e.g. the availability of the design documents, the observation of damage, the use of the structure). A site visit is recommended prior to initiating the procedure. The assessment is carrie
46、d out taking into account the actual conditions of the structures (see the flowchart in Annex B) and is composed in general of steps a) to f): a) specification of the assessment objectives; b) scenarios; c) preliminary assessment: 1) study of documents and other evidence, 2) preliminary inspection,
47、3) preliminary checks, 4) decisions on immediate actions, 5) recommendation for detailed assessment; d) detailed assessment: 1) detailed documentary search and review, 2) detailed inspection and material testing, 3) determination of actions, 4) determination of properties of the structures, 5) struc
48、tural analysis, 6) verification; e) results of assessment: 1) report, 2) conceptual design of construction interventions, 3) control of risk; f) repetition of the sequence if necessary. The procedure outlined above may be applied to both the assessment of one specific structure and the assessment of
49、 a group of structures. ISO 13822:2010(E) ISO 2010 All rights reserved 54.3 Specification of the assessment objectives At the outset, the objective of the assessment of the structure shall be clearly specified in terms of its future performance in an agreement between the client, the authorities when relevant and the assessing engineer (see 4.1). The required future performance shall be specified in the utilization plan and safety plan. 4.4 Scenario Scenarios related to a change in structural conditions or actions shoul
