1.0.1 This code is formulated with a view to implementing the national laws and regulations on the seismic protection and disaster mitigation and the prevention-first policy so that the special structures can relieve seismic damage after seismic fortification to avoid casualties or complete loss of use function and minimize economic loss.
1.0.2 This code is applicable to seismic design of special structures at the area with Intensity 6 ~ Intensity 9 seismic precautionary intensity.
1.0.3 The seismic precautionary objective for the special structures, subjected to the seismic design according to this code, within 50-year design service life: the main structure shall not be damaged or not required to be repaired and may continue in service in case of being suffered from the frequent earthquakes below seismic precautionary intensity of this area; the damaged structure may continue in service after general repair in case of being suffered from precautionary earthquake equivalent to seismic precautionary intensity of this area; the integral collapse shall be avoided in case of being suffered from the rare earthquake higher than seismic precautionary intensity of this area.
1.0.4 The special structures with Intensity 6 or above seismic precautionary intensity must be subjected to seismic design.
1.0.5 The seismic precautionary intensity and the design parameters of ground motion must be determined according to the documents (graphic documents) approved and issued by the national authority and adopted according to the approval documents.
1.0.6 The seismic precautionary intensity shall adopt the basic seismic intensity in the current national standard "Seismic Ground Motion Parameter Zonation Map of China" GB 18306 or the intensity corresponding to the design basic acceleration value of ground motion in this code. The engineering site subjected to the seismic safety evaluation should be subjected to seismic fortification according to approved seismic precautionary intensity or the design parameters of ground motion.
1.0.7 The seismic design of special structures shall meet not only the requirements stipulated in this code, but also the provisions of the related current national standards.
Foreword I
1 General Requirement
2 Terms and Symbols
2.1 Terms
2.2 Symbols
3 Basic Requirements
3.1 Category and Criterion for Seismic Precaution of Special Structures
3.2 Earthquake Strong Motion
3.3 Site and Base
3.4 Structural System and Seismic Design Requirements
3.5 Structural Analysis
3.6 Nonstructural Components
3.7 Materials and Construction
4 Site, Soil and Foundation
4.1 Site
4.2 Foundations on Soil
4.3 Liquefaction Soil
4.4 Seismic Subsidence of Soft Soil
4.5 Pile Foundations
4.6 Seismic Stability of Slope
5 Earthquake Action and Seismic Checking
5.1 General Requirement
5.2 Horizontal Earthquake Action
5.3 Vertical Earthquake Action
5.4 Checking for Strength
5.5 Checking for Deformation
6 Reinforced Concrete Frame-bent Structures
6.1 General Requirement
6.2 Essentials in Calculation
6.3 Details for Frame
6.4 Details for Frame-walls
6.5 Details for Bents
7 Steel Frame-bent Structure
7.1 General Requirement
7.2 Essentials in Calculation
7.3 Modification of Seismic Action Effect on Structure
7.4 Seismic Checking for Beam, Column and Joint
7.5 Seismic Checking for Connections of Structural Components
7.6 Seismic Design for the Braces
7.7 Details for Steel Frame Bent Structures
8 Steel Structures for Boilers
8.1 General Requirement
8.2 Essentials in Calculation
8.3 Details for Steel Structure Boilers
9 Silo
9.1 General Requirement
9.2 Essentials in Calculation
9.3 Details for Silos
10 Shaft Headframe
10.1 General Requirement
10.2 Essentials in Calculation
10.3 Details for Reinforced Concrete Headframe
10.4 Details for Steel Headframe
11 Shaft Tower
11.1 General Requirement
11.2 Essentials in Calculation
11.3 Details for Reinforced Concrete Shaft Tower
11.4 Details for Steel Shaft Tower
12 Hyperbolic Cooling Tower
12.1 General Requirement
12.2 Essentials in Calculation
12.3 Details for Hyperbolic Cooling Tower
13 Television Tower
13.1 General Requirement
13.2 Essentials in Calculation
13.3 Details for Television Tower
14 Foundation of Petrochemical Tower-type Equipment
14.1 General Requirement
14.2 Essentials in Calculation
14.3 Details for Foundation of Petrochemical Tower-type Equipment
15 Foundation of Coke Oven
15.1 General Requirement
15.2 Essentials in Calculation
15.3 Details for Foundation of Coke Oven
16 Belt-conveyor Corridor
16.1 General Requirement
16.2 Essentials in Calculation
16.3 Details for Belt-conveyor Corridor
17 Pipe Support Framework
17.1 General Requirement
17.2 Essentials in Calculation
17.3 Details for Pipe Support Framework
18 Concentration Tank
18.1 General Requirement
18.2 Essentials in Calculation
18.3 Details of Seismic Design
19 Foundation of Atmosphiric Vertical Cylindrical Tank
19.1 General Requirement
19.2 Essentials in Calculation
19.3 Details for Foundation of Atmosphiric Vertical Cylindrical Tank
20 Foundation of Spherical Tank
20.1 General Requirement
20.2 Essentials in Calculation
20.3 Details for Foundation of Spherical Tank
21 Foundation of Horizontal Equipment
21.1 General Requirement
21.2 Essentials in Calculation
21.3 Details for Foundation of Horizontal Equipment
22 Structure of Blast Furnaces System
22.1 General Requirement
22.2 Blast Furnace
22.3 Hot-blast Stove
22.4 Dust Collector and Washing Tower
23 Tailing Dam
23.1 General Requirement
23.2 Essentials in Calculation
23.3 Details for Tailing Dam
24 Cableway Support Framework
24.1 General Requirement
24.2 Essentials in Calculation
24.3 Details for Cableway Support Framework
25 Retaining Structure
25.1 General Requirement
25.2 Calculation of Seismic Earth Pressure
25.3 Essentials in Calculation
25.4 Details for Retaining Structure
Appendix A The Earthquake Intensity, Basic Acceleration of Ground Motion and Design Earthquake Groups of Main Cities in China
Appendix B Determination of Shear-wave Velocity of Soil Layer
Appendix C Computational Condition of Plane Frame-bent Structure and Modified Coefficient of Spatial Seismic Action Effect
Appendix D Seismic Design for the Core Zone of Column-beam Joint of Frames
Appendix E Simplified Seismic Calculation of Wind Resisting Column for Gable Wall
Appendix F Calculation of Lateral Displacement Stiffness and Internal Force of Steel Bracing Memebers
