TCVN 9386-1-2012 Design of structures for earthquake resistances-Part 1. General rules, seismic actions and rules for buildings

TCVN VIETNAM NATIONAL STANDARD TCVN 9386-1: 2012 Design of structures for earthquake resistances Part 1: general rules, seismic actions and rules for buildings (This translation is for reference only) Ha noi − 2012 Foreword Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 TCVN 9386-1:2012 Contents Pages Foreword Introduction Part 1: General rules, seismic actions and rules for buildings General .8 1.1 Scope 1.2 Normative References .9 1.3 Assumptions 11 1.4 Distinction between principles and application rules 11 1.5 Terms and definitions 12 1.6 Symbols 24 1.7 S.I Units 36 PERFORMANCE REQUIREMENTS AND COMPLIANCE CRITERIA 37 2.1 Fundamental requirements 37 2.2 Compliance Criteria 38 GROUND CONDITIONS AND SEISMIC ACTION 41 3.1 Ground conditions .41 3.2 Seismic action .43 DESIGN OF BUILDINGS 52 4.1 General 52 4.2 Characteristics of earthquake resistant buildings 52 4.3 Structural analysis .61 4.4 Safety verifications .80 SPECIFIC RULES FOR CONCRETE BUILDINGS 86 5.1 General 86 5.2 Design concepts 89 5.3 Design to EN 1992-1-1 97 5.4 Design for DCM 95 5.5 Design for DCH 118 5.6 Provisions for anchorages and splices 133 5.7 Design and detailing of secondary seismic elements .136 5.8 Concrete foundation elements 137 5.9 Local effects due to masonry or concrete infills 140 5.10 Provisions for concrete diaphragms .141 5.11 Precast concrete structures .142 SPECIFIC RULES FOR STEEL BUILDINGS .151 Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 TCVN 9386-1:2012 6.1 General 151 6.2 Materials .153 6.3 Structural types and behaviour factors 154 6.4 Structural analysis .159 6.5 Design criteria and detailing rules for dissipative structural behaviour common to all structural types 159 6.6 Design and detailing rules for moment resisting frames 161 6.7 Design and detailing rules for frames with concentric bracings 166 6.8 Design and detailing rules for frames with eccentric bracings 169 6.9 Design rules for inverted pendulum structures .175 6.10 Design rules for steel structures with concrete cores or concrete walls and for moment resisting frames combined with concentric bracings or infills .175 6.11 Control of design and construction 176 7.1 SPECIFIC RULES FOR COMPOSITE STEEL – CONCRETE BUILDINGS 176 General 176 7.2 Materials .178 7.3 Structural types and behaviour factors 179 7.4 Structural analysis .181 7.5 Design criteria and detailing rules for dissipative structural behaviour common to all structural types 182 7.6 Rules for members .185 7.7 Design and detailing rules for moment frames .196 7.8 Design and detailing rules for composite concentrically braced frames .198 7.9 Design and detailing rules for composite eccentrically braced frames 199 7.10 Design and detailing rules for structural systems made of reinforced concrete shear walls composite with structural steel elements 200 7.11 Design and detailing rules for composite steel plate shear walls 203 7.12 Control of design and construction 203 SPECIFIC RULES FOR TIMBER BUILDINGS 203 8.1 General 205 8.2 Materials and properties of dissipative zones 206 8.3 Ductility classes and behaviour factors 207 8.4 Structural analysis 208 8.5 Detailing rules 208 8.6 Safety verifications 210 8.7 Control of design and construction 210 SPECIFIC RULES FOR MASONRY BUILDINGS 210 Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 TCVN 9386-1:2012 9.1 Scope 210 9.2 Materials and bonding patterns .211 9.3 Types of construction and behaviour factors 211 9.4 Structural analysis .212 9.5 Design criteria and construction rules 213 9.6 Safety verification 216 9.7 Rules for “simple masonry buildings” .216 10 BASE ISOLATION 216 10.1 Scope 216 10.2 Definitions 216 10.3 Fundamental requirements .220 10.4 Compliance criteria 221 10.5 General design provisions 221 10.6 Seismic action .221 10.7 Behaviour factor .223 10.8 Properties of the isolation system .223 10.9 Structural analysis .224 10.10 Safety verifications at Ultimate Limit State 228 ANNEX A(Informative) ELASTIC DISPLACEMENT RESPONSE SPECTRUM 230 ANNEX B (Informative) DETERMINATION OF THE TARGET DISPLACEMENT FOR NONLINEAR STATIC (PUSHOVER) ANALYSIS .232 ANNEX C(Normative) DESIGN OF THE SLAB OF STEEL-CONCRETE COMPOSITE BEAMS AT BEAM-COLUMN JOINTS IN MOMENT RESISTING FRAMES .236 ANNEX D (Informative) Symbols 246 ANNEX E (Normative) LEVEL AND COEFFICIENT of IMPORTANCE .249 ANNEX F (Normative) CLASSIFICATION FOR CONSTRUCTION STRUCTURE .241 ANNEX G (Normative) ZONING MAPS OF BACKGROUND ACCELERATION ON VIET NAM TERRITORY 262 ANNEX H (Normative) ZONING TABLE OF BACKGROUND ACCELERATION ACCORDING TO ADMINISTRATIVE PLACE-NAMES 263 ANNEX I (Informative) CONVERTING TABLE FROM TOP OF BACKGROUND ACCELERATION INTO SEISM GRADE 283 Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 TCVN 9386-1:2012 Foreword TCVN 9386: 2012 was transferred from TCXDVN 375:2006 into Vietnam National standard as stipulated in Section 1, Article 69 of the Law on Standards and Technical Regulations and in Point a, Section 1, Article of Decree No 127/2007/ND-CP of the Government dated 01 August 2007 detailing the implementation of a number of articles of the Law on Standards and Technical Regulation TCVN 9386: 2012 was prepared by Vietnam Institute for Building Science and Technology, proposed Ministry of Construction, appraised by Directorate for Standards, Metrology and Quality, and announced by Ministry of Science and Technology Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 TCVN 9386-1:2012 Introduction TCVN 9386:2012 Design of structures for earthquake resistance was prepared on the basis of "Eurocode 8: Design of structures for earthquake resistance" with amendment or replacement for parts with the specific characterisistics of Vietnam Eurocode comprises following p arts: EN1998-1 General rules, seismic actions and rules for buildings EN1998-2 Bridges EN1998-3 Assesssment and retrofitting of buildings EN1998-4 Silos, tanks and pipelines EN1998-5 Foundations, retaining structures and geotechnical aspects EN1998-6 Towers, masts and chimney In this publication, parts relating to buildings and works corresponding to the following parts of Eurocode are concerned: Part corresponding to EN1998-1; Part corresponding to EN1998-5; Amendments or replacements for Part 1: Annex E (Normative) Level and coefficient of importance Annex F (Normative) Classification for construction structure Annex G (Normative) Zoning maps of background acceleration on Vietnam Territory Annex H (Normative) Zoning table of background acceleration according to administrative placenames Annex I (Informative) Converting table from top of background acceleration into seism grade General reference standards quoted in clause 1.2.1 is still not yet replaced by any current standards of Vietnam, since it required to ensure the comprehensiveness between the standards in European standard system The Standard System of Vietnam approaching European Standard System shall promulgate these quoted standard one after the other The zoning map of background acceleration of Vietnam territory as the result of independant subject of national level "The research of earthquake forecast and foundation oscillation in Vietnam, to be established and taken legal responsibility by Global physics Institute which to be checked and taken over in 2005 by National Council of Inspection The map used in this standard having reliability and legality Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 TCVN 9386-1:2012 equivalent to a special version of the map with the same name which has been corrected under the proposal in the valuation repport of National Council of Inspection In the acceleration zoning map, top of background acceleration reference to agR in territory of Vietnam is performed by isolines The value of agR between the two isolines should be defined in accordance with linear interpolation In the areas may have conflicts of background acceleration, the value of agR should be decided by the investor From top of background acceleration agR is able to change to earthquake level under MSK-64 ladder, MM ladder or other graded ladders when it’s required to apply the different design standards for earthquake resistant structures Following the value of designed background acceleration ag = γI.agR, divided into cases of earthquakes - Strong earthquake ag ≥ 0,08g, must calculate and design of seismic resistance - Weak earthquake 0,04g ≤ ag < 0,08g, only required to apply the lighten seismic resistant solutions - Very weak earthquake ag < 0,04g, no necessary to design seismic resistance In Eurocode 8, it proposed to use two types of spectrum curves, spectrum curve type to be used for the areas having seismic intensity Ms ≥ 5,5, spectrum curve type to be used for the area having seismic intensity Ms < 5,5 In this standard should use spectrum curve type because most of areas occurred earthquakes in Vietnam having seismic intensity Ms ≥ 5,5 Should not design the earthquake resistant structures the same for all type pf structures, the different structures should have the different designs for earthquake resistance Depending on levels and the importance of structures considering to apply the suitable coefficient of importance γI In case it may have conflicts of important level, value γI should be decided by the investor Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 TCVN 9386-1:2012 VIETNAM NATIONAL STANDARD TCVN 9386-1: 2012 Design of structures for earthquake resistances Part 1: General rules, seismic actions and rules for buildings General 1.1 Scope 1.1.1 Scope of the standard: Design of structures for earthquake resistances (1)P This standard applies to the design and construction of buildings and civil engineering works in seismic regions Its purpose is to ensure that in the event of earthquakes: − human lives are protected; − damage is limited; and − structures important for civil protection remain operational NOTE The random nature of the seismic events and the limited resources available to counter their effects are such as to make the attainment of these goals only partially possible and only measurable in probabilistic terms The extent of the protection that can be provided to different categories of buildings, which is only measurable in probabilistic terms, is a matter of optimal allocation of resources and is therefore expected to vary from country to country, depending on the relative importance of the seismic risk with respect to risks of other origin and on the global economic resources (2)P Special structures, such as nuclear power plants, offshore structures and large dams, are beyond the scope of EN 1998 (3)P This standard contains only those provisions that, in addition to the provisions of the other relevant Eurocodes, must be observed for the design of structures in seismic regions It complements in this respect the other standards 1.1.2 Scope of Part (1) This part applies to the design of buildings and civil engineering works in seismic regions It is subdivided in 10 Sections, some of which are specifically devoted to the design of buildings (2) Section of this part contains the basic performance requirements and compliance criteria applicable to buildings and civil engineering works in seismic regions (3) Section of this part gives the rules for the representation of seismic actions and for their combination with other actions (4) Section of this part contains general design rules relevant specifically to buildings Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 TCVN 9386-1:2012 (5) Sections to of this part contain specific rules for various structural materials and elements, relevant specifically to buildings as follows: − Section 5: Specific rules for concrete buildings; − Section 6: Specific rules for steel buildings; − Section 7: Specific rules for composite steel-concrete buildings; − Section 8: Specific rules for timber buildings; − Section 9: Specific rules for masonry buildings (6) Section 10 contains the fundamental requirements and other relevant aspects of design and safety related to base isolation of structures and specifically to base isolation of buildings (7) Annex C contains additional elements related to the design of slab reinforcement in steel-concrete composite beams at beam-column joints of moment frames NOTE Informative Annex A and informative Annex B contain additional elements related to the elastic displacement response spectrum and to target displacement for pushover analysis 1.2 Normative References (1)P This standard incorporates by dated or undated reference, provisions from other publications These normative references are cited at the appropriate places in the text and the publications are listed hereafter For dated references, subsequent amendments to or revisions of any of these publications apply to this Standard only when incorporated in it by amendment or revision For undated references the latest edition of the publication referred to applies 1.2.1 General reference standards EN 1990 Eurocode - Basis of structural design EN 1992-1-1 Eurocode – Design of concrete structures – Part 1-1: General – Common rules for building and civil engineering structures EN 1993-1-1 Eurocode – Design of steel structures – Part 1-1: General – General rules EN 1994-1-1 Eurocode – Design of composite steel and concrete structures – Part 1-1: General – Common rules and rules for buildings EN 1995-1-1 Eurocode – Design of timber structures – Part 1-1: General – Common rules and rules for buildings EN 1996-1-1 Eurocode – Design of masonry structures – Part 1-1: General –Rules for reinforced and unreinforced masonry Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 TCVN 9386-1:2012 EN 1997-1 Eurocode - Geotechnical design – Part 1: General rules 1.2.2 Reference Codes and Standards (1)P For the application of this standard, reference shall be made to EN 1990, to EN 1997 and to EN 1999 (2) This standard incorporates other normative references cited at the appropriate places in the text They are listed below: TCVN 7870 (ISO 80000), the international system of units (SI) and its publication; EN 1090-1 1.3 Execution of steel structures – Part 1: General rules and rules for buildings Assumptions (1) The general assumptions are: - the choice of the structural system and the design of the structure are made by appropriately qualified and experienced personnel; – execution is carried out by personnel having the appropriate skill and experience; – adequate supervision and quality control is provided during execution of the work, i.e in design offices, factories, plants, and on site; – the construction materials and products are used as specified in the relevant execution standards, or reference material or product specifications; – the structure will be adequately maintained; – the structure will be used in accordance with the design assumptions (2)P It is assumed that no change in the structure will take place during the construction phase or during the subsequent life of the structure, unless proper justification and verification is provided Due to the specific nature of the seismic response this applies even in the case of changes that lead to an increase of the structural resistance 1.4 Distinction between principles and application rules (1) The Principles comprise: – general statements and definitions for which there is no alternative, as well as ; – requirements and analytical models for which no alternative is permitted unless specifically stated (2) The Principles are identified by the letter P following the paragraph number (3) The Application Rules are generally recognized rules which comply with the principles and satisfy 10 Information Center for Standards, Metrology and Quality- Hoang Quoc Viet Street, Cau Giay, Hanoi, Vietnam, Tel: 844 37562608 ... 1: General rules, seismic actions and rules for buildings General 1.1 Scope 1.1 .1 Scope of the standard: Design of structures for earthquake resistances (1)P This standard applies to the design. .. and concrete structures – Part 1-1: General – Common rules and rules for buildings EN 1995-1-1 Eurocode – Design of timber structures – Part 1-1: General – Common rules and rules for buildings EN.. .TCVN 9386-1:2012 Contents Pages Foreword Introduction Part 1: General rules, seismic actions and rules for buildings General .8 1.1