1.0.1 In order to implement the present national technical and economic policies during the reinforced concrete silos to materialize the advanced technologies, safety, appliance, economy, rationality and to assure the quality, establish this code.
1.0.2 This code is applicable to the design of the cast-in-place reinforced concrete silos for storage of granular materials and the mixture silos for blending powder materials with compressed air, with the plane shape of circle or rectangle. This code is not applicable to the design of silos for storing succulence and fibrous granular materials.
1.0.3 The designs of silos can be divided into designs of deep bin and shallow bin. For the rectangular shallow bin, the silos can be classified into hopper bin, low-wall shallow bin and high-wall shallow bin. The classification standards shall comply with the following specifications:
1 When the ratio of the calculation height hn of stored materials in silo to the internal diameter dn of circular silo or to the short side length bn of rectangular silo is greater than or equivalent to 1.5, the silo is a deep bin; when the ratio is less than 1.5, the silo is a shallow bin.
2 For a rectangular silo, when there are no walls of silo, it is a hopper silo; when the ratio of wall height of silo h to the shallow side length b is less than 0.5, the silo is a short-wall shallow bin; when the ratio is greater than or equivalent to 0.5, the silo is a high-wall shallow bin.
1.0.4 The design of reinforced concrete silos, except that it shall comply with this code, shall observe the specifications of the related active national compulsory standards.
1 Generals 2 Terms and symbols 21 Terms 22 Symbols 3 Arrangement rules and structure selection 31 Basic provisions 32 Arrangement principles 33 Selection of structure 4 Loads on structures 41 loads classification and combination of loading effects 42 Pressure of stored material 5 Structural computation 51 General provisions 52 Top of silo, wall of silo and structure of silo bottom 53 Pre-stress of silo wall 54 Supporting structure of silo bottom and foundation 6 Structure 61 Bin wall and silo wall of circular silo 62 Wall of rectangular silo 63 Hole opening 64 Hopper 65 Column and ring beam 66 Liner 67 Anti-seismic structure measures 68 Wall of prestressed concrete silo Appendix A: Slot Container Appendix B: Physical Characteristics of Bulk Storages Appendix C: Storage Pressure Calculating Formula of Shallow Circular Warehouse Appendix D: Factor = cos2 + ksin2 , k = tan2(45º - /2) And = the value of (1 – e - μks/ ) Appendix E: Stress Calculation of Star-Type Silo Walls and Openings Appendix F: The Internal Force of the Rotating Shell Under Symmetrical Loads Appendix G: The Calculation of Internal Force of the Rectangular Silo Based on Flat Component Appendix H: Storage Impact Factor, Strength Reduction Factor of Concrete and Steel Bars Under High Temperature Condition, Strength of the Prestressed reinforcement, Friction actor, Calculating Factors for Sub-Bending Moment and Sub-Shearing Force
Standard
GB 50077-2003 Code for design of reinforced concrete silos (English Version)
1.0.1 In order to implement the present national technical and economic policies during the reinforced concrete silos to materialize the advanced technologies, safety, appliance, economy, rationality and to assure the quality, establish this code.
1.0.2 This code is applicable to the design of the cast-in-place reinforced concrete silos for storage of granular materials and the mixture silos for blending powder materials with compressed air, with the plane shape of circle or rectangle. This code is not applicable to the design of silos for storing succulence and fibrous granular materials.
1.0.3 The designs of silos can be divided into designs of deep bin and shallow bin. For the rectangular shallow bin, the silos can be classified into hopper bin, low-wall shallow bin and high-wall shallow bin. The classification standards shall comply with the following specifications:
1 When the ratio of the calculation height hn of stored materials in silo to the internal diameter dn of circular silo or to the short side length bn of rectangular silo is greater than or equivalent to 1.5, the silo is a deep bin; when the ratio is less than 1.5, the silo is a shallow bin.
2 For a rectangular silo, when there are no walls of silo, it is a hopper silo; when the ratio of wall height of silo h to the shallow side length b is less than 0.5, the silo is a short-wall shallow bin; when the ratio is greater than or equivalent to 0.5, the silo is a high-wall shallow bin.
1.0.4 The design of reinforced concrete silos, except that it shall comply with this code, shall observe the specifications of the related active national compulsory standards.
Contents of GB 50077-2003
1 Generals
2 Terms and symbols
21 Terms
22 Symbols
3 Arrangement rules and structure selection
31 Basic provisions
32 Arrangement principles
33 Selection of structure
4 Loads on structures
41 loads classification and combination of loading effects
42 Pressure of stored material
5 Structural computation
51 General provisions
52 Top of silo, wall of silo and structure of silo bottom
53 Pre-stress of silo wall
54 Supporting structure of silo bottom and foundation
6 Structure
61 Bin wall and silo wall of circular silo
62 Wall of rectangular silo
63 Hole opening
64 Hopper
65 Column and ring beam
66 Liner
67 Anti-seismic structure measures
68 Wall of prestressed concrete silo
Appendix A: Slot Container
Appendix B: Physical Characteristics of Bulk Storages
Appendix C: Storage Pressure Calculating Formula of Shallow Circular Warehouse
Appendix D: Factor = cos2 + ksin2 , k = tan2(45º - /2) And = the value of (1 – e - μks/ )
Appendix E: Stress Calculation of Star-Type Silo Walls and Openings
Appendix F: The Internal Force of the Rotating Shell Under Symmetrical Loads
Appendix G: The Calculation of Internal Force of the Rectangular Silo Based on Flat Component
Appendix H: Storage Impact Factor, Strength Reduction Factor of Concrete and Steel Bars Under High
Temperature Condition, Strength of the Prestressed reinforcement, Friction actor, Calculating Factors for
Sub-Bending Moment and Sub-Shearing Force
