This Specification specifies the structural forms, material requirements, load and earthquake action, structural calculation, subgrade and foundation as well as construction requirements for tower-type equipment foundation in petrochemical enterprises.
This Specification is applicable to the design for tower-type equipment foundation and vertical vessel foundation not lower than 10m above ground in petrochemical enterprises (hereinafter all referred to as tower foundation).
Foreword i
1 Scope 1
2 Normative References 1
3 Main Symbols 1
4 Structural Forms 5
5 Materials 7
6 Load and Earthquake Action 8
6.1 Load Classification 8
6.2 Live Loads on the Platform 8
6.3 Wind Load 8
6.4 Earthquake Action 11
7 Load and Earthquake Effect Combinations 11
8 Structural Calculation 14
8.1 General Requirements 14
8.2 Drum and Cylinder Structure 15
8.3 Ring Frame Structure 15
8.4 Square Frame Structure 19
8.5 Plate Frame Structure 20
8.6 Structural Seismic Checking 25
9 Subgrade and Foundation 26
9.1 Subgrade Bearing Capacity Checking 26
9.2 Subgrade Deformation Calculation 28
9.3 Foundation Design and Calculation 29
10 Construction Requirements 35
10.1 General Requirements 35
10.2 Construction of Drum Type Tower Foundation 35
10.3 Construction of Cylinder Type Tower Foundation 36
10.4 Construction of Frame-Type Tower Foundation 36
Appendix A (Normative) Calculation for Basic Natural Vibration Period of Tower-type Equipment 44
Appendix B (Informative) Calculation Formula for Concentrated Vertical Loads Generated on foundation Bolt on Ring Beam under the Action of Top Bending Moment MT and Calculation Formula for Bending Moment, Shear Force and Torque of Horizontal Arc Beam under the Action of Concentrated Vertical Load 45
Appendix C (Informative) Distribution Calculation Formula for Concentrated Vertical Loads Generated on Foundation Bolt under the Action of Square Frame Beam Bending Moment (MT) 52
Explanation of Wording 56
