GB 50018-2002 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 50018-2002 | English | 135 |
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Technical code of cold-formed thin-wall steel structures
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GB 50018-2002: Technical code of cold-formed thin-wall steel structures---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB50018-2002
NATIONAL STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
5*1$A~~"111111tti/l
Technical code of cold-formed thin-wall
steel structures
Issued on, September 27,2002 Implemented on...January 1 ,2003
Jointly lss1led by Ministry of Celistructlon or the People's Republic of China
General Achntnlstration of Quality Sapervision, lmpection and
Quarantine of tlae Peoplets Repablic of Chioa
Table of Contents
General ... } ... I
2 Terms and Symbols ... 2
2.1 Terms ... 2
2.2 Symbols ... 3
3 Materials ... 8
4 Basic design provision ... 10
4.1 Design principles... 10
4.2 Design index ... 11
4.3 General regulation of structure ... 13
5 Calculation of members ... 15
5 .1 Axial tensile member ... 15
5.2 Axial compressive member ... 15
5 .3 Flexural member ... 19
5.4 Stretch bending member ... 22
5.5 Press bending member ... 22
5.6 Compressive elements in member ... 27
6 Calculations and configurations of connection ... 3 3
6.1 Calculations of connection ... 33
6.2 Configurations ofconnection ... 42
7 Formed steel plate ... 45
7.1 Calculations of formed steel plate ... 45
7.2 Configurations of formed steel plate ... 48
8 Purlin and wall beam ... 51
8.1 Calculations of purlin ... 51
8.2 Configurations of purlin ... 53
8.3 Calculations of wall beam ... 54
8.4 Configurations of wall beam ... 5 5
9 Roof truss ... 5 6
9.1 Calculations of roof truss ... 56
9.2 Configurations of roof truss ... 57
10 Rigid frame ... 58
10.1 Calculations of rigid frame ... 58
10.2 Configurations of rigid frame ... 62
11 Manufacture, installation and anti corrosion ... 64
11.1 Manufacture and installation ... 64
11.2 Anticorrosion ... 67
Appendix A Coefficient of calculation ... 70
Appendix B Section characteristics ... 79
Appendix C Calculation method of design values of strength Wrich considering the effect of cold forrning .. 97
Appendix D The classification of the effect of corrosion and the mating and the maintaining annual limit
of the priming lacquer, the surface lacquer of anticorrosion ... 98
Wording explanations for this code ... I 00
1 General
1.0.1 This code has been worked out for the purpose of implementing the technical and
economical policies of the country in design and construction of cold-formed thin-walled
steel structure so that the design and construction can be technically advanced, economically
reasonable, reliable and safe and ensure the quality of the works.
1.0.2 This code applies to the design and construction of cold-formed thin-walled steel
structure works for building engineering.
1.0.3 This code does not cover the special requirements of structure which bearing
dynamic loading directly and cold-formed thin-walled steel structure which undergoing
intense corrosive effect.
1.0.4 The design principles of this code are constituted according to the present National
Standard "United Code for Design of the reliability of Building Structure" GB 50068.
1.0.5 When designing cold-formed thin-wall steel structure, it should ensure that the
structure comply with the requirements of intension, stability and rigidity, and accord with the
fireproofing and anticorrosion requirements during the course of transportation, installation
and performance, the materials, structure schemes and configuration measures should be
selected reasonably taken into account of engineering reality.
1.0.6 Apart from the implementation of this code, the design and construction of
cold-formed thin-wall steel structure shall also be in conformity with relevant standards being
now in use in the country.
2 Terms and Symbols
2.1 Terms
2. 1. 1 Elements
The flatplate part between two adjacent longitudinal sides in thin-walled section steel
member.
2. 1. 2 Stiffened elements
The elements which two longitudinal sides both connect with other elements.
2. 1. 3 Partially stiffened elements
The elements which one longitudinal side connects with other elements, and the other is
a element which is stiffened by the border crimp which accords with requirements.
2. 1. 4 Unstiffened elements
The elements which one longitudinal side connects with other elements, and the other is
a free element.
2. 1. 5 Uniformly compressed elements
The elements, which undergo the effect of axis 's uniform pressure.
2. 1. 6 Non-uniformly compressed elements
The elements which undergo the effect of axis's linear non-uniform distributed stress.
2. 1. 7 Sub-elements
The elements which one longitudinal side connects with other elements, and the other is
connected with intermediate stiffener according with requirements, or which two longitudinal
sides are both connect with intermediate stiffeners according with requirements.
2. 1. 8 Width-to-thickness ratio
The ratio of the width and the thickness of elements.
2. 1. 9 Effective width-to-thickness ratio
To simplify calculation, the width of elements is discounted when considering
compressed elements' strength after using flexuosity. The ratio of the calculated width of
elements after discounting and thickness.
before welding. Concrete welding parameters should be determined according to testing to
ensure welding quality.
2 Rust, dirt, seeper etc. at welding position should be cleaned clearly before welding.
Drying processing should be performed for welding rod, welding flux.
3 When section steel is butt welded or welded all around section, it should not start arc
and extinct arc at the same position and should extinct arc after moving some distance from arc
starting position that is covered. It should not start arc and extinct are at non-welding position
and welding end of parent metal.
4 After finishing welding, it should clean sinter on surface of weld and splashing
substance at two sides clearly and check appearance quality of weld.
5 Before welding it should adopt measures to reduce welding distortion for member.
6 When performing welding in butt weld, it should adopt proper welding measures
(methods such as leaving space in advance, single or double butt weld with backing etc.) to
ensure welding through.
7 Selection of each technological parameter (such as resistance welding time, welding
current, electrode pressure etc.) of resistance spot welding should guarantee measuring up of
shearing strength test of welding spot. During performing welding, each parameter should
remain relatively stable and contacting surface of weldments should be jointed closely.
8 It should adopt coniform electrode in resistance spot welding and its diameter should
not be less than sJi (where t is thickness of outer thinner element among weldments).
During performing welding, fluctuant amplitude should not be more than 1/5.
11.1.7 Cold-formed thin-walled steel structural member should be packed after coat is dry
and packing should protect that member's coat not to be damaged and should guarantee that
member cannot be deformed, be damaged, be dissipated during the course of transportation,
loading and unloading, stacking.
11.1.8 Installation of cold-formed thin-walled steel structure should accord with following
requirements.
1 It should perform checking to member's quality before structure installation. It should
take processing when distortion, defect of member exceed allowable deviation.
2 When structure is in hoisting, it should adopt proper measures to avoid permanent
deformation and should fill up contacting part of rope buckle and member.
3 It should not use cold-formed thin-walled steel member that is installed to
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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