1.0.1 This Specification is formulated with a view to realizing reasonable application of concrete structure (including steel and concrete mixed structure), safety and usability, advanced technology, economy and rationality, as well as convenient construction during the tall building engineering.
1.0.2 This Specification is applicable to the concrete structures of residential building of 10 stories and above or with building height greater than 28m, or the other tall civil building with building height greater than 24m. As for the tall civil buildings of non-seismic design or of seismic design in Intensity 6~9 seismic precautionary intensity, the applicable maximum height and structure type shall meet the relevant requirements of this Specification.
This Specification is not applicable to the tall buildings built in the dangerous areas or within the minimum avoidance distance of seismogenic fault.
1.0.3 Supplementary analysis and argumentation may be carried out for the concrete structures of tall building adopting seismic design by performance-based seismic design of structure, where the building height, regularity and structure type exceeds the requirements of this Specification, or there are special requirements in seismic precautionary criterion.
1.0.4 As for tall building, conceptual design, structural selection, and regularity of plane and vertical plane layout shall be emphasized; constructional measures shall be strengthened; structure system with good seismic protection and wind resistance as well as economic rationality shall be selected preferentially. During the seismic design, the integral seismic performance shall be ensured to make the integral structure have necessary bearing capacity, rigidity and ductility.
1.0.5 During the design and construction of concrete structures of tall building, not only the requirements stipulated in this Specification, but also those in the current relevant ones of the nation shall be complied with.
Contents
1 General Provisions 1
2 Terms and Symbols 2
2.1 Terms 2
2.2 Symbols 3
3 Basic Requirement of Structural Design 6
3.1 General Requirement 6
3.2 Materials 6
3.3 Height and Aspect Ratio Limitations 7
3.4 Structural Plan Layout 9
3.5 Structural Vertical Arrangement 13
3.6 Diaphragm System 14
3.7 Limitations for Story Drift and Comfort 15
3.8 Strength Design of Members 18
3.9 Seismic Design Grade of Structural Members 19
3.10 Requirement for Members of Special Seismic Design Grade 21
3.11 Performance-based Seismic Design of Structures 22
3.12 Requirement for Preventing Structural Progressive Collapse 25
4 Loads and Seismic Action 27
4.1 Vertical Load 27
4.2 Wind Load 27
4.3 Seismic Action 29
5 Structural Analysis 38
5.1 General Requirement 38
5.2 Analysis Parameters 39
5.3 Analysis Modeling 40
5.4 Second-Order Effects and Structural Stability 41
5.5 Elasto-Plastic Analysis and Check of Story Drift of Weak and/or Soft Stories 43
5.6 Effects of Combinations of Loads and/or Seismic Actions 45
6 Design of Frame Structure 48
6.1 General Requirement 48
6.2 Strength Design 50
6.3 Requirement for Detailing of Frame beams 53
6.4 Requirement for Detailing of Frame Columns 57
6.5 Requirement for Splices and Anchorages of Reinforcement 63
7 Design of Shearwall Structure 68
7.1 General Requirement 68
7.2 Section Design and Detailing 70
8 Design of Frame-shear Wall Structure 84
8.1 General Requirement 84
8.2 Strength Design and Detailing 87
9 Design of Tube Structure 90
9.1 General Requirement 90
9.2 Frame-corewall Structure 92
9.3 Tube in Tube Structure 93
10 Design of Complicated Tall Buildings 95
10.1 General Requirement 95
10.2 Structure with Transfer Story 96
10.3 Structure with Outriggers and/or Belt Members 103
10.4 Structure with Staggered Stories 104
10.5 Towers Linked with Connective Structure 105
10.6 Structure with Setback and Cantilever 106
11 Design of Mixed Structures 107
11.1 General Requirement 107
11.2 Structural Layout and Arrangement 110
11.3 Structural Analysis 112
11.4 Design of Structure Members 113
12 Design of Basement and Foundation 121
12.1 General Requirement 121
12.2 Design of Basement 122
12.3 Design of Foundation 124
13 Construction of Tall Building 127
13.1 General Requirement 127
13.2 Surveying 128
13.3 Foundation 130
13.4 Vertical Transportation 131
13.5 Scaffold and Falsework 132
13.6 Formworks 133
13.7 Steel Reinforcement 136
13.8 Concrete 137
13.9 Massive Concrete 138
13.10 Mixed Structure 139
13.11 Complicated Structures 141
13.12 Construction Safety 141
13.13 Green Construction 142
Appendix A Calculation of the Acceleration of Floor Vertical Vibration 144
Appendix B Wind Pressure Coefficients of Buildings 146
Appendix C Horizontal Earthquake Calculation with Equivalent Base Shear Method 150
Appendix D Check of Stability of Structural Wall 153
Appendix E Lateral Stiffness Requirements for Stories Adjacent to Transfer Story 155
Appendix F Design of Concrete Filled Circular Steel Tubes 157
Explanation of Wording in This Specification 168
List of Quoted Standards 169