1 Scope
This standard specifies the terms and definitions, designation and specifications, requirements, test methods, inspection rules, acceptance, and marking, packaging, transportation and storage of bolted spherical node of space grid structures.
This standard is applicable to the quality control for parts and components of bolted spherical nodes of grid and double-layer reticulated shell (curved grid) structures.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest edition of the normative document applies.
GB/T 196 General purpose metric screw threads - Basic dimensions
GB/T 197-2003 General purpose metric screw threads - Tolerances
GB/T 222 Method of sampling steel for determination of chemical composition and permissible variations for product analysis
GB/T 223 Methods for chemical analysis of iron, steel and alloy
GB/T 228 Metallic materials - Tensile testing at ambient temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 699 Quality carbon structure steel - Grades and technical requirements
GB/T 700 Carbon structural steels
GB/T 1591 High strength low alloy structural steels
GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing
GB/T 3077 Alloy structure steel - Technical requirements
GB/T 3098.1 Mechanical properties of fasteners - Bolts, screws and studs
GB/T 6728-2002 Cold formed steel hollow sections for general structure - Dimensions, shapes, weight and permissible deviations
GB/T 8162 Seamless steel tubes for structural purposes
GB/T 13793 Steel pipes with a longitudinal electric (resistance) weld
GB/T 16939-1997 High strength bolts for joints of space grid structures
GB 50205-2001 Code for acceptance of construction quality of steel structures
JG/T 203 Method for ultrasonic testing and classification for steel structures
3 Terms and definitions
For the purpose of this standard, the following terms and definitions apply.
3.1
bolted spherical node
node consisting of bolt sphere, high strength bolt, mantle, fastening bolt, conic end with plate, as shown in Figure 1
3.2
bolt sphere
part connecting each member by screwing in high strength bolts
3.3
high strength bolt
connector used to connect a member and a bolt sphere
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Designation and specifications
5 Requirements
6 Test methods
7 Inspection rules
8 Acceptance
9 Marking, packaging, transportation and storage
