1 Scope
This specification specifies the basic requirements for the structural design, loads and seismic actions, structural design, subgrade and foundation, etc. of the steel frames supporting coolers and exchangers in petrochemical industry.
This specification is applicable to the design of steel frames supporting coolers, exchangers (hereinafter referred to as “cooling and heat-exchanging equipment”) and horizontal vessels, as well as that of steel frames with air coolers (hereinafter referred to as “air coolers”) on the top floor. This specification is not applicable to the design of steel frames with air coolers on the top of the pipe gallery.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 5117 Carbon steel covered electrodes
GB/T 5118 Low alloy steel covered electrodes
GB/T 5313 Steel plates with through-thickness characteristics
GB 50009 Load code for the design of building structures
GB 50010 Code for design of concrete structures
GB 50011 Code for seismic design of buildings
GB 50017 Code for design of steel structures
GB 50160 Fire prevention code of petrochemical enterprise design
SH 3137 Technical specification of fire protection for steel structures in petrochemical industry
SH/T 3147 Specification for seismic design of special structures in petrochemical industry
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3 Terms and definitions
For the purposes of this specification, the following terms and definitions apply.
3.1
coolers and exchangers frames
steel frames supporting coolers, exchangers and horizontal vessels, as well as those with air coolers on the top floor
3.2
beams supporting equipment
steel beams directly or indirectly supporting the equipment
Foreword II
1 Scope
2 Normative references
3 Terms and definitions
4 Major symbols
4.1 Loads and load effects
4.2 Calculation indexes
4.3 Geometric parameters
4.4 Calculation factors and other coefficients
5 Basic requirements
5.1 Structural forms and general requirements
5.2 Connections
5.3 Materials
6 Loads and seismic actions
6.1 Load types
6.2 Live loads on platforms
6.3 Equivalent load of air cooler fans and motors
6.4 Wind loads
6.5 Seismic action
7 Structural design
7.1 General requirements
7.2 Seismic design
7.3 Load and seismic action effects combinations
7.4 Ultimate limit state calculation of bearing capacity of members
7.5 Connections between horizontal equipment stools and beams
7.6 Column footing
8 Subgrade and foundation
Annex A (Informative) Approximate calculation of wind loads on frames
Explanation of wording in this specification
