1.0.1 This specification is formulated with a view to reasonably use concrete structure (including mixed structure of steel and concrete) in the tall building projects, so as to realize safety, usability, state-of-the-art technology, and cost-effectiveness and construction convenience.
1.0.2 This Specification is applicable to the civil tall buildings, 10-story or higher, or whose height exceeds 28m. The applicable tall buildings hereof can be either in non-aseismic design or in the aseismic design under 6-9° seismic protection intensity. The maximum height and structure type for the applicable buildings shall be in accordance with relevant provisions of this Specification.
This specification is not applicable to the tall buildings built on hazardous locations.
1.0.3 The seismic protection intensity for the tall building must be determined according to those documents (drawings) examined/approved and awarded by the specific national authorities. Generally, the seismic protection intensity may be selected from the basic seismic intensities specified by the Seismic Intensity Zoning Plan of China; for those areas where the seismic protection zoning plans have been prepared, the seismic protection can be implemented according to approved seismic protection intensity or the designed seismic ground motion.
1.0.4 The tall buildings with aseismic design shall be classified into three seismic protection types, Type A, B and C, according to the significance of the functions for use. Classification of the seismic protection types shall be in accordance with relevant regulations specified in the current national standard "Standard for Classification of Seismic Protection of Buildings" GB 50223 and "Code for Seismic Design of Buildings" GB 50011.
1.0.5 Structural design for tall building shall pay attention to conceptual design, structural lectotype and regularity for horizontal/facade Layout, and shall preferential select a structural system that has favorable aseismic and wind resistance properties and strengthen structure measures. In the aseismic design, integral seismic performance for the structure shall be adopted, so as to make the entire structure be provided with necessary bearing capacity, rigidity and ductility.
1.0.7 Not only the requirements stipulated in this Specification, but also those in the current relevant compulsory ones of the nation shall be complied with by the design and construction for concrete structure of tall building.
Foreword II
1 General provision 5
2 Terminologies and symbols 7
2.1 Terminologies 7
2.2 Symbols 8
3 Load and earthquake effect 11
3.1 Vertical load 11
3.2 Wound load 11
3.3 Earthquake effect 14
4 The general requirement for structure design 23
4.1 General requirement 23
4.2 Applicable height and depth-width ratio of the buildings 23
4.3 Structural plan layout 24
L/B 25
L/B 25
4.4 Vertical layout of structure 27
4.5 Floor structure 28
4.6 Requirement for horizontal displacement limitation and comfort level 29
4.7 Expression of design for member bearing capacity 30
4.8 Aseismic grades 31
4.9 Structure requirement 32
5 Calculation and analysis of the structure 35
5.1 General requirements 35
5.2 Calculating parameter 36
5.3 Treatment of design schedule 37
5.4 Gravity second-order effect and structural stability 38
5.5 Calculation for the elastic-plastic deformation of weak story 39
5.6 Combination of load effect and earthquake effect 40
6 Frame structure design 43
6.1 General requirements 43
6.2 Section design 45
6.3 Construction requirement for frame girder 48
6.4 Construction requirements for frame columns 50
6.5 Connection and anchorage of reinforced bars 54
7 The structure design of shear wall 59
7.1 General requirements 59
7.2 Section design and construction 60
8 Design of frame-shearwall structure 73
8.1 General requirements 73
8.2 Section design and construction 75
9 Design of tube structure 78
9.1 General requirements 78
9.2 Frame-corewall structure 79
9.3 Tube-in-tube structure 80
10 Structure designs of complex tall buildings 82
10.1 General requirements 82
10.2 The structure of tall buildings with transfer story 82
10.3 The structure of tall buildings with belt members 89
10.4 Split-level structure 90
10.5 Siamese structure 90
10.6 Multi-tower structure 91
11 Design of mixed structure 92
11.1 General requirements 92
11.2 Structural arrangement and structural design 92
11.3 Structure Requirement for Section Steel Concrete Component 95
12 Foundation design 99
12.1 General requirements 99
12.2 Raft foundation 100
12.3 Coffer foundation 101
12.4 Pile foundation 102
13 High-rise building structure constructions 104
13.1 General requirements 104
13.2 Construction survey 104
13.3 Formwork Engineering 106
13.4 Reinforcing work 108
13.5 Concrete formwork 108
13.6 Precast element installation 109
13.7 Deep foundation construction 110
13.8 Work place safety requirement 111
Annex A Shape Coefficients of Wind Load 112
Annex B the Base Shear Method for Calculation of Structural Horizontal Earthquake Action 116
Annex C Section aseismic checking of frame column's node 119
Annex D Calculation of Walling Stability 122
Annex E the Regulations on Lateral Rigidity of the Transfer Story's Upper and Lower Structure 123
Explanation of Wording in this code 125