GBJ 18-1987 Technical Specification for Cold-Formed Thin-Walled Steel Structures GBJ18-87 GBJ18-1987 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Technical Specification for Cold-formed Thin-walled Steel Structure
GBJ18—87
1989Beijing
Engineering Construction Standard Full-text Information System
WEngineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Technical Specification for Cold-formed Thin-walled Steel Structure
GBJ18-—87
Editor Department:
Hubei Provincial Planning Commission
National Planning Commission Approval Department:
Effective Date: October 1, 1988
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on the Release of "Technical Specifications for Cold-bent Thin-walled Steel Structures"
Ji Biao [1987] No. 2355
According to the requirements of the former State Construction Commission (81) Jianfa She Zi No. 546, the Hubei Provincial Planning Commission and relevant departments revised the original "Technical Specifications for Thin-walled Steel Structures" (TJ18-75), and the relevant departments reviewed it. The revised "Technical Specifications for Cold-bent Thin-walled Steel Structures" GBJ18-87 is now approved as a national standard and will be implemented on October 1, 1988.
This specification is managed by the Hubei Provincial Planning Commission. The specific interpretation and other work is the responsibility of the Central South Architectural Design Institute. The publication and distribution is the responsibility of China Planning Press. State Planning Commission
December 12, 1987
Engineering Construction Standards Full Text Information System
W.bzsosO.cOEngineering Construction Standards Full Text Information System
Revision Notes
This specification is edited by our Commission in accordance with the notice of the former State Capital Construction Commission (81) Jianfashezi No. 546. Specifically, the former Hubei Industrial Building Design Institute and relevant units revised the "Technical Specifications for Thin-walled Steel Structures" (TJ18-75) approved by the former State Capital Construction Commission and the Ministry of Metallurgical Industry in 1975. After the original specification was promulgated in 1975, the specification management group organized relevant domestic units to carry out scientific research cooperation in accordance with a unified plan, and conducted relatively systematic investigations and necessary scientific experiments. On this basis, when formulating this specification, we carefully summarized the scientific research results and engineering practice experience at home and abroad, drew on relevant foreign standards, and widely solicited opinions from relevant units across the country. After several discussions and revisions, it was finally reviewed and finalized by our Commission and relevant departments.
This code consists of 9 chapters and 7 appendices, including: general principles, materials, basic design regulations, calculation of components and connections, standards, roof trusses, rigid frames, corrugated steel sheets, fabrication, installation and corrosion protection, etc. The main contents of this revision are: replacing the allowable stress design method with the limit state design method based on probability theory, adding the calculation method and scope of application of cold bending effect, using relevant formulas to calculate the strength and stability of compression and bending members, adjusting the value of the stability coefficient of axially compressed members, modifying the calculation method of the cross beam of the mountain-shaped portal rigid frame, modifying the calculation formula and relevant coefficients of the local stability of uniformly compressed plates and non-uniformly compressed plates: adding the relevant provisions on the design of corrugated steel sheets: adding the provisions on resistance spot welding and high-strength bolt connections: adjusting and supplementing the contents of the fabrication and corrosion protection chapters. The implementation of this code must be used in conjunction with the "Code for Loading Structures of Buildings" (GBJ9-87), and must not be mixed with the "Code for Loading Structures of Industrial and Civil Buildings" (TJ9-74).
In order to improve the quality of the specification, all units are requested to send any problems and comments found in the process of implementing this specification to the Central South Architectural Design Institute (formerly Hubei Industrial Architectural Design Institute) (Wuchang) at any time for further revision in the future. Hubei Provincial Planning Commission
April 1987
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Main Symbols
Load and Load Effect
B——Double Bending Moment;
F——Concentrated Load;
M—Bending Moment,
N——Axial Force;
P—Design Pretension of High Strength Bolts;
V——Shear Force.
Calculation index
E—elastic modulus of steel;
G——shear modulus of steel;
——shear design bearing capacity of each weld of resistance spot welding N,——tensile design bearing capacity of a connector N—shear design bearing capacity of a connector, tensile, compressive and bending design strength of steel; end face pressure design strength of steel;
f. Tensile strength of steel;
f. — design shear strength of steel;
f,--the service point of steel;
f, f\, f bolts’ compression, tension and shear design strength; f°, f, f”--butt welds’ compression, tension and shear design strength; — design compression, tension and shear design strength of fillet welds; g——normal stress;
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
r shear stress.
geometric parameters
A——gross cross-sectional area,
A——net cross-sectional area;
A——effective Section area;
Aef——effective net section area;
H——column height,
H. Calculated height of a column;
1——gross section moment of inertia;
I.—net section moment of inertia;
I—gross section torsional moment of inertia;
I. —gross section fan property moment,
—moment of inertia of the side stiffening rib of the corrugated steel plate;Ie
-moment of inertia of the middle stiffening rib of the corrugated steel plate;—gross section area moment;
gross section resistance moment;
W.—net section resistance moment;Www.bzxZ.net
|- gross section fan resistance moment;
effective section resistance moment;
effective net section resistance moment;
height of the curling edge; length of the upper chord interval of the lattice bar; spacing of the connectors;
maximum allowable spacing of the connectors;
—— width of the section or plate;
b. — width of the sub-plate in the corrugated steel plate, bs—— flange width of the combined 1-shaped section; b1, b2—— effective width of the plate;
d- diameter of the hole on the component; diameter;
engineering 2 construction standard full text information system
engineering construction Assume that the standard full-text information system
d. —Effective diameter at the bolt thread;
e——Eccentricity;
e. —Coordinate of the cross section bending center on the axis of symmetry (with the centroid as the origin); h——Height of the cross section or plate;
h. —Calculated height of the web;
h, —Height of the fillet weld;
i——Radius of gyration,
a length or span; Distance between lateral support points; Length of the center line of the steel section;
l—Calculated length of the weld;
l. —Calculated length;
l.—Calculation length for torsional buckling;
——bending radius of the inner surface of the i-th corner of the cross section; t——thickness;
9——included angle;
——slenderness ratio;
%——converted slenderness ratio;
——converted slenderness ratio for flexural-torsional buckling.
Calculation coefficient
n——number of bolts at the connection; total number of spans between the two lateral support points; n. ——number of spans where the internal force is pressure;
n. ——The number of shear surfaces of each bolt;
n—The number of connections at the same section;
α, β—Constraint coefficients of components;
βm—Equivalent bending moment coefficient;
—Ratio of steel tensile strength to yield point;——Coefficient for calculating the allowable width-to-thickness ratio of plates;51, 52, 53—Coefficients used in calculating the overall stability coefficient of bending members;Engineering Construction Standard Full-text Information System
WEngineering Construction Standard Full-text Information System
\—Coefficient used in calculating the overall stability coefficient of bending members; Coefficient used in calculating the design strength considering the cold bending effect;S—Coefficient used in calculating the overall stability coefficient of bending members;u—Calculation length coefficient of rigid frame column;
u—Lateral calculation length coefficient of beam,
?Stability coefficient of axially compressed members;
9, 9°—Overall stability coefficient of bending members. Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Chapter 1 General
Chapter 2 Materials
Chapter 3 Basic Design Provisions
Section 1 Design Principles
Section 2 Design Strength
Section 3 General Provisions for Construction
Chapter 4 Calculation of Components and Connections
Section 1 Axially Tensile Components
Section 2
Axially Compression Components
Section 3
Tension-bending members
Section 4
Section 5
Compression-bending members
Bending members
Section 6 Compression plates in members
Section 7
Chapter 5
Section 1
Section 2
Calculation of standard bars
Construction of standard bars
Chapter 6 Roof
Calculation of roof trusses
Section 1
Section 2
Roof trusses Construction
Chapter 7 Steel
Section 1 Calculation of Steel Frame…
Section 2 Construction of Steel Frame…
Chapter 8 Corrugated Steel Sheet
Section 1 Calculation of Corrugated Steel Sheet
Engineering Construction Standard Full-text Information System
（17）
（30)
（32)
（36)
W. Engineering Construction Standard Full-text Information System
Section 2 Construction of Corrugated Steel Sheet||tt ||Chapter 9 Fabrication, Installation and Corrosion Prevention·
Section 1 Fabrication and Installation·
Section 2 Corrosion Prevention
Appendix I Explanation of Glossary
Conversion of Commonly Used Non-Statutory Units of Measurement and Legal Units Appendix II
Relationship Table
Appendix III
Appendix IV
Appendix V
Appendix VI
Calculation Coefficient
Sectional Characteristics
(45)
... (79)
Calculation method of design strength considering cold bending effect, classification of erosion action and matching of coatings
Appendix VII Explanation of terms used in this specification
Additional explanation
Engineering Construction Standard Full Text Information System
W Engineering Construction Standard Full Text Information System
Chapter 1 General
Article 1.0.1 This specification is formulated to implement the technical and economic policies of the state in the design and construction of cold-bent thin-walled steel structures, to reasonably select materials, structural schemes and construction measures based on actual conditions, to achieve advanced technology, economic rationality, safety and applicability, and to ensure quality.
Article 1.0.2 This specification is applicable to the design and construction of cold-bent thin-walled steel structures for industrial and civil buildings and general structures, and is not applicable to cold-bent thin-walled steel structures subject to strong erosion action.
Article 1.0.3 This specification does not consider the special requirements of load-bearing structures that directly bear dynamic loads.
Article 1.0.4 The calculation principles of this code are based on the "Standard for Design of Building Structures" (GBJ68-84).
Article 1.0.5 The design and construction of cold-bent thin-walled steel structures shall comply with the requirements of the relevant national standards and specifications in addition to complying with this code. Engineering Construction Standard Full Text Information System
W.bzsoso.con
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.