Chapter 1 General Provisions
Article 1.0.1 This Specification is formulated with view to implementing national technical and economic policies in the design and construction of steel structure of tall building, to achieving technical advancement, economic rationality, safety and usability, and to ensuring quality thereof.
Article 1.0.2 This Specification is applicable to design and construction of steel structure of Class B or below high buildings, whose height and structure type are in accordance with those without seismic precaution and with precautionary intensity between Intensity 6 and Intensity 9 (hereinafter referred to as Intensity 6~Intensity 9) as specified in Table 1.0.2.
Table 1.0.2 Applicable Height of Steel Structure and Tall Building with Concrete Shear Wall Steel Structure (m)
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Note: The applicable height refers to the height of regular structure, calculated from the outdoor floor to the building cornice.
Article 1.0.3 In the design of steel structure of tall building, the structural type shall be selected appropriately according to the characteristics of tall building and taking comprehensive consideration of buildings' use function, load nature, material supply, manufacture and installation; as for the structure selection and design of the construction and node, the structural system and plane and evaluation arrangement with good seismic and wind-resistant performance and economy and rationality shall be preferred.
Article 1.0.4 The steel structure with concrete shear wall shall also meet the requirements of current standard of the Nation "Specification for Design and Construction of Reinforced Concrete Tall Building".
Article 1.0.5 The steel structure of high buildings under seismic precaution may be classified into Classes A, B, C and D according to importance of the use function. The division shall meet the requirements of the current national standard "Standard for classification of Seismic Protection of Structure" (GB 50233).
Article 1.0.6 The seismic design of steel structure of tall building shall meet the following requirements:
I. Class A buildings shall be subjected to the seismic action calculation in accordance with specialized seismic ground motion parameter;
II. The Class C buildings situated at Classes I-III sites according to Intensity 6 precaution may not be subjected to the seismic action calculation;
III. The Class C buildings situated at Class IV according to Intensity 6 precaution, Class B buildings in Intensity 6 precaution and Class B and Class C buildings in Intensity 7~9 Intensity precautions shall be subjected to the seismic action calculation according to the precautionary intensity of this area;
IV. The buildings in Intensity 6 precaution may not be subjected to the structural calculation under the rare earthquake action.
Chapter 2 Materials
Article 2.0.1 The steel of steel structure of tall building should adopt Q235 Grades B, C, D carbon structural steels and Q345 Grades B, C, D, E low alloy high tensile structural steels. The quality standard thereof shall be in accordance with the requirements of the current national standards "Carbon Structural Steels" (GB 700) and "High Strength Low Alloy Structural Steels" (GB/T 1591). The steel of other grades may be adopted where the reliable reference is provided.
Article 2.0.2 The steel of the load bearing members shall be selected according to the structure importance, load characteristics, connection method, ambient temperature and position where the members are located in terms of the grades and materials; the steel shall have qualified tensile strength, elongation, yield point, cold bending test and impact toughness and the sulfur and phosphorus content shall be in accordance with the limit. The butt weld structure shall ensure that the carbon content limit is qualified.
Article 2.0.3 The yield ratio of seismic structure steel shall not be less than 1.2; the obvious yield step shall be provided; the elongation shall be greater than 20%; good weldability shall be provided.
Article 2.0.4 The steel performance shall be resistant to atmospheric corrosion and cryogenic cold brittleness where the load bearing structure is exposed and at the low temperature.
Article 2.0.5 The welded node shall be conducted according to those specified in the current national standard "Steel Plate with Through-thickness Characteristics" (GB 5313) where the plate is greater than or equal to 50mm thick and bears the tensile force along the plate thickness direction; the percentage reduction of area in the direction of the mezzanine board thickness shall not be less than the permissible value specified in Grade Z15 in this standard.
Article 2.0.6 The design steel strength adopted by the structure shall not be less than the requirements of Table 2.0.6.
Article 2.0.7 The physical performance of steel shall be in accordance with the requirements of Article 3.2.3 in the current national standard "Specifications for the Design of Steel Structures" (GBJ 17).
The steel grade and class and additional guarantee requirements for Z-direction performance shall be indicated in the design document of the steel structure of tall building and the order document of the steels.
Contents
Chapter 1 General Provisions
Chapter 2 Materials
Chapter 3 Structural System and Arrangement
Section 1 Structural System and Selection
Section 2 Arrangement of Structural Plane
Section 3 Vertical Arrangement of Structure
Section 4 Other Requirements for Structural Arrangement
Section 5 Ground, Foundation and Basement
Chapter 4 Action
Section 1 Vertical Action
Section 2 Wind Load
Section 3 Earthquake Action
Chapter 5 Calculation of Action Effect
Section 1 General Requirements
Section 2 Static Calculation
Section 3 Checking and Calculation of Seismic Action Effect
Section 4 Action Effect Combination
Section 5 Checking and Calculation Requirements
Chapter 6 Design of Steel Members
Section 1 Beams
Section 2 Axial Compression Column
Section 3 Frame Column
Section 4 Central Support
Section 5 Eccentric Support
Section 6 Other Lateral Force Resisting Members
Chapter 7 Composite Floor
Section 1 General Requirements
Section 2 Composite Beam Design
Section 3 Design of Composite Floor Slabs of Profiled Steel Sheet
Section 4 Detailing Requirements of Composite Beam and Composite Plate
Chapter 8 Joint Design
Section 1 Principles of Design
Section 2 Connection
Section 3 Connection of Beam and Column
Section 4 Connection of Column and Column
Section 5 Connection of Beams
Section 6 Steel Column Footing
Section 7 Support Connection
Chapter 9 Connection of Curtain Wall and Steel Frame
Section 1 General Requirements
Section 2 Design and Structure of Connection Node
Section 3 Key Points of Construction
Chapter 10 Manufacturing
Section 1 General Requirements
Section 2 Materials
Section 3 Setting-out, Marking-off and Cutting
Section 4 Straightening and Edge Machining
Section 5 Assembly
Section 6 Welding
Section 7 Holing
Section 8 Processing of Friction Surface
Section 9 End Processing
Section 10 Rust Prevention, Coating, Numbering and Shipment
Section 11 Acceptance of Members
Chapter 11 Installation
Section 1 General Requirements
Section 2 Locating Axis, Elevation and Anchor Bolt
Section 3 Quality Inspection of Members
Section 4 Installation Sequence of Members
Section 5 Field Welding Sequence of Member Joints
Section 6 Installation of Steel Members
Section 7 Measurement Update for Installation
Section 8 Welding Procedure for Installation
Section 9 Construction Technology for High Strength Bolts
Section 10 Coating of the Structure
Section 11 Completion Acceptance for Installation
Chapter 12 Fire Protection
Section 1 General Requirements
Section 2 Determination of Fire Protection Materials and Protective Layer Thickness
Section 3 Fireproof Structure and Construction
Appendix 1 Wind Load Shape Coefficients for Tall Buildings
Appendix 2 Eccentricity Calculation
Appendix 3 Stability Coefficient ψ of Category d Section of Axial Compression Member
Appendix 4 Calculation of Steel Plate Shear Wall
Appendix 5 Design of Build-in Steel Plate Support Shear Wall
Appendix 6 Design of Concrete Shear Wallboard with Vertical Joint
Appendix 7 Calculation of Fire Protective layer Thickness of Steel Member
Appendix 8 Explanation of Wording in this Specification
Additional Explanation Chief Development Organization, Participating Organizations and Chief Drafting Staff of this Specification
