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Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Code for Design of Masonry Structures
GBJ3—88
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Code for Design of Masonry Structures
GBJ3—88
Editor Department: Former Ministry of Urban and Rural Construction and Environmental Protection of the People's Republic of China Approval Department: Ministry of Construction of the People's Republic of China January 1||tt| |Effective Date: 1
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Notice on the Release of the National Standard "Code for Design of Masonry Structures"
(88) Jianbiaozi No. 383
According to the requirements of the former State Construction Commission (81) Jianfashezi No. 546, the former Ministry of Urban and Rural Construction and Environmental Protection, together with relevant departments, revised the "Code for Design of Masonry Structures" GBJ3-73 and renamed it "Code for Design of Masonry Structures", which has been reviewed by relevant departments. The "Code for Design of Masonry Structures" GBJ3-88 is now approved as a national standard and will be implemented on September 1, 1989. The "Code for Design of Masonry Structures" GBJ3-73 was abolished on January 1, 1991.
This code is managed by the Ministry of Construction, and its specific interpretation and other work are the responsibility of China Architecture Northeast Design Institute. The publication and distribution is the responsibility of China Architecture Industry Press. Ministry of Construction of the People's Republic of China
November 28, 1988
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Revision Notes
"Code for Design of Masonry Structures" is a revision of "Code for Design of Masonry Structures" GBJ3-73 by China Construction Northeast Design Institute in conjunction with relevant domestic units, in accordance with the notice of the former State Construction Commission (81) Jianfa Shezi No. 546. During the revision process of this code, the revision group organized relevant units such as domestic design, scientific research and colleges and universities to carry out targeted scientific research work on masonry structure reliability, housing space work, eccentric compression, local compression, wall beams, cantilever beams and reinforced masonry in accordance with the requirements of the unified plan; investigated and summarized domestic practical experience; drew on some contents of relevant foreign design codes, and widely solicited opinions from relevant units across the country. After repeated revisions, it was finally reviewed and finalized by our ministry in conjunction with relevant departments. The revised code consists of seven chapters and seven appendices. The main contents of the revision are: adopting the limit state design method based on probability theory and calculating with the design expression of partial coefficients, supplementing the design of medium and small block houses and the static calculation scheme of multi-story houses considering space work that have been widely used in my country in recent years; adding the design and construction of wall beams and highlights: modifying the basic strength expression of masonry and the calculation of eccentrically compressed long columns and the calculation formula of local compressed and reinforced masonry, etc. This code must be used in conjunction with various building structure design standards and specifications such as the "Building Structure Load Code" GBJ9-87 formulated and revised in accordance with the "Building Structure Design Unified Standard" GBJ68-84 approved and issued by the state in 1984, and must not be mixed with various national building structure design standards and specifications that have not been formulated and revised in accordance with the "Building Structure Design Unified Standard" GBJ68-84.
In order to improve the quality of the specification, each unit should pay attention to accumulating information and summarizing experience in the process of implementing this specification. If you find any need for modification or supplement, please send your opinions and relevant information to China Architecture Northeast Design Institute (Shenyang Nanhu) for reference in future revisions.
Ministry of Construction
November 28, 1988
Engineering Construction Standards Full Text Information System
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Chapter 1 General Provisions
Chapter 2
Material Strength Grade
Section 1
Calculation Index of Masonry
Section 2
Chapter 3
Section 1
Section 2
Section 3
Section 4
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 5
Section 2
Section 3||tt ||Chapter 6
Section 1
Section 2
Section 3
Section 4
Section 5
Chapter 7
Section 2
Basic design provisions
Design principles
Static calculation provisions for houses
Bearing capacity calculation of unreinforced masonry components
Compression components
Local compression·
Axial tension components·
Bending components
Shear components
Structural requirements
Allowable height-to-thickness ratio of columns·
General structural requirements·
Main measures to prevent wall cracking
Ring beams, lintels, wall beams, cantilever beams and tube beams Arch ring beam
Reinforced brick masonry components
Network reinforced brick masonry components
Combined brick masonry components
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Appendix 1
Appendix 2
Appendix 3
Appendix 4
Appendix 5
Appendix 6
Appendix 7
Method for determining the specifications and strength grades of stone materials****.*51
Calculation formulas and standard values of strength averages of various masonry structures52Static calculation method of rigid-elastic scheme housesStatic calculation method of multi-story houses with rigid upper part and flexible lower partInfluence coefficient and h
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Conversion between commonly used non-legal measurement units and legal measurement units00900006609068
Relationship table
Explanation of terms used in this standard69
Additional notesList of the editorial unit, participating units and main drafters of this standard70Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
Main symbols
Action and effect
N——Design value of axial force;
N——Standard value of axial force;
Ni——Design value of axial force on local compression area, beam end bearing pressure; N.——Design value of upper axial force,
N.——Design value of axial tension;
——Design value of bending moment;
——Anti-overturning moment;
——Design value of overturning moment;
——Design value of shear force,
——Design value of concentrated force;
Design value of upper average compressive stress;
——Average compressive stress generated by the standard value of constant load. Calculation index
MU——Strength grade of a block (brick, stone, block);M—Mortar strength grade;
f1——Average compressive strength of a block (brick, stone, block);f2——Average compressive strength of mortar;
——Design value of compressive strength of masonry;
——Standard value of compressive strength of masonry;
ft—Design value of axial tensile strength of masonry;ft——Standard value of axial tensile strength of masonry;fm——Bending strength grade of masonry fm - design value of bending tensile strength; fm - standard value of bending tensile strength of masonry; engineering construction standard full text information system
engineering construction standard full text information system
f, - design value of shear strength of masonry;
f - standard value of shear strength of masonry;
f - design value of compressive strength of mesh reinforced brick masonry; f - design value of strength of tensile steel bars;
- design value of strength of compressive steel bars;
f. - design value of axial compressive strength of concrete; E - elastic modulus of masonry
E. - elastic modulus of concrete;
G - shear modulus of masonry.
Geometric parameters
A——Cross-sectional area,
A1——Local compression area;
Ao——Calculation area affecting local compression strength; Ab——Block area;
As——Cross-sectional area of the reinforcement farther from the axial force;
——Cross-sectional area of the compression reinforcement;
——Area of the compression part of the masonry;
——Volume;
8——Distance between adjacent transverse walls, window walls or pilasters; b——Distance between adjacent transverse walls The width of the door and window openings within the distance between the wall, window wall or pilasters;
6——section width, side length;
——the flange width of the calculated section of the wall with pilasters, the calculated width of the wing wall; the thickness of a wall or the side length of the longitudinal force eccentricity direction of the rectangular section, the height of the beam;
hb——the height of the block, the height of the joist;
ho—the effective height of the section, the converted height of the cushion beam; ht——the converted thickness of the T-shaped section;
hw——the height of the wall , calculated height of wall; Engineering Construction Standard Full Text Information System
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4——Side length, actual support length of beam end; ao——Effective support length of beam end;
c, d——Distance;
e——Eccentricity
Total height of wall, height of component;
One layer height;
Calculated height of component;
H.—Height of the upper section of variable section column degree;
-the height of the lower section of the variable section column;
-the calculated span of the beam,
the clear span of the beam;
1-section inertia moment;
i-the radius of gyration of the section;
-section area moment;
u-section circumference, horizontal displacement;
-maximum horizontal displacement;
section resistance moment;
-the distance from the center of gravity of the section to the edge of the section in the direction of the axial force; 2-internal force arm.
Calculation coefficient
——Partial coefficient of structural member material performance; vo——Structural importance coefficient;
Va——Adjustment coefficient;
——Local compressive strength improvement coefficient, internal force arm coefficient; a——Coefficient;
β——Height-to-thickness ratio of the member;
[B]—Allowable height-to-thickness ratio of a wall or column;
n——Spatial performance influence coefficient, coefficient; 9—Axial force influence coefficient, coefficient;
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Engineering Construction Standard Full Text Information System
9—Axial force influence coefficient of mesh reinforced brick masonry components; 9om—Stability coefficient of composite brick masonry components;—Reinforcement ratio,
—Correction coefficient of allowable height-to-thickness ratio of non-load-bearing walls; u2—Correction coefficient of allowable height-to-thickness ratio of walls with door and window openings;—Reduction coefficient;
—Relative height of compression zone of section, coefficient, 56
—Limit value of relative height of compression zone;
s—Local pressure coefficient.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 1 General
Article 1.0.1 This specification is specially formulated in order to implement the technical and economic policies of the state in masonry structure design, adhere to the principle of adapting measures to local conditions and using local materials, reasonably select structural schemes and building materials, and achieve advanced technology, reasonable economy, safety and applicability, and ensure quality.
Article 1.0.2 This code applies to the design of masonry structures of general industrial and civil houses and structures.
Article 1.0.3 This code applies to five-row masonry structures: 1. Brick masonry, including fired ordinary bricks (clay bricks and silicate bricks), non-fired silicate bricks and load-bearing clay hollow brick masonry. 2. Block masonry, including medium-sized and small hollow blocks of concrete and medium-sized solid blocks of fly ash.
3. Stone masonry, including various types of stone and rough stone masonry. Article 1.0.4 This code is formulated in accordance with the principles stipulated in the "Uniform Standard for Design of Building Structures" (GBJ68-84). Article 1.0.5 The design of houses and structures in earthquake zones and under special conditions or with special requirements shall still comply with the provisions of the relevant national standards and specifications currently in force. Engineering Construction Standard Full Text Information System
W.bzsoso.cO Engineering Construction Standard Full Text Information System
Chapter 2 Materials
Section 1 Material Strength Grade
Article 2.1.1 The strength grade of blocks and mortar shall be adopted in accordance with the following provisions: 1. The strength grade of fired ordinary bricks, non-fired silicate bricks and load-bearing hollow clay bricks, etc.: MU30 (300), MU25 (250), MU20 (200), MU15 (150), MU10 (100) and MU7.5 (75). 2. The strength grade of masonry blocks: MU15, MU10, MU7.5, MU5 and MU3.5.
3. The strength grade of stone: MU100, MU80, MU60, MU50, MU40, MU30, MU20, MU15 and MU10.
IV. Strength grade of mortar: M15, M10, M7.5, M5, M2.5, M1 and M0.4.
Note: ① The brackets are the numbers specified in the original standards of the corresponding materials ② The specifications, dimensions and strength grades of stone materials can be determined according to the method in Appendix 1. ③ When determining the strength grade of silicate blocks, the compressive strength of the blocks should be multiplied by the natural carbonization coefficient. For medium-sized solid boron blocks made of fly ash, when there is no natural carbonization coefficient test, 1.15 times the artificial carbonization coefficient can be taken, and it shall not be greater than 0.9.
Section 2 Calculation Index of Masonry
Article 2.2.1 The design values of compressive strength of various masonry calculated based on gross cross-section at an age of 28d shall be adopted according to the following provisions according to the strength grades of blocks and mortar:, the design values of compressive strength of sintered ordinary bricks, non-sintered silicate bricks and load-bearing hollow clay brick masonry shall be adopted according to Table 2.2.1-1. 2. The design value of compressive strength of one-brick-thick hollow bucket body shall be adopted according to Table 2.2.1-2.
3. The design value of compressive strength of concrete small hollow block masonry with block height of 180-350mm shall be adopted according to Table 2.2.1-3. Engineering 2 Construction Standard Full Text Information System
W.bzsoso.coI—The height of the upper section of the variable section column;
-The height of the lower section of the variable section column;
-The calculated span of the beam,
The clear span of the beam;
1——Section moment of inertia;
i——Radius of gyration of the section;
-Section area moment;
u——Section circumference, horizontal displacement;
-Maximum horizontal displacement;
Section resistance moment;
-The distance from the center of gravity of the section to the edge of the section in the direction of the axial force; 2——Internal force arm.
Calculation coefficient
——Partial coefficient of structural member material performance; vo——Structural importance coefficient;
Va——Adjustment coefficient;
——Local compressive strength improvement coefficient, internal force arm coefficient; a——Coefficient;
β——Height-to-thickness ratio of the member;
[B]—Allowable height-to-thickness ratio of a wall or column;
n——Spatial performance influence coefficient, coefficient; 9—Axial force influence coefficient, coefficient;
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Engineering Construction Standard Full Text Information System
9—Axial force influence coefficient of mesh reinforced brick masonry components; 9om—Stability coefficient of composite brick masonry components;—Reinforcement ratio,
—Correction coefficient of allowable height-to-thickness ratio of non-load-bearing walls; u2—Correction coefficient of allowable height-to-thickness ratio of walls with door and window openings;—Reduction coefficient;
—Relative height of compression zone of section, coefficient, 56
—Limit value of relative height of compression zone;
s—Local pressure coefficient.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 1 General
Article 1.0.1 This specification is specially formulated in order to implement the technical and economic policies of the state in masonry structure design, adhere to the principle of adapting measures to local conditions and using local materials, reasonably select structural schemes and building materials, and achieve advanced technology, reasonable economy, safety and applicability, and ensure quality.
Article 1.0.2 This code applies to the design of masonry structures of general industrial and civil houses and structures.
Article 1.0.3 This code applies to five-row masonry structures: 1. Brick masonry, including fired ordinary bricks (clay bricks and silicate bricks), non-fired silicate bricks and load-bearing clay hollow brick masonry. 2. Block masonry, including medium-sized and small hollow blocks of concrete and medium-sized solid blocks of fly ash.
3. Stone masonry, including various types of stone and rough stone masonry. Article 1.0.4 This code is formulated in accordance with the principles stipulated in the "Uniform Standard for Design of Building Structures" (GBJ68-84). Article 1.0.5 The design of houses and structures in earthquake zones and under special conditions or with special requirements shall still comply with the provisions of the relevant national standards and specifications currently in force. Engineering Construction Standard Full Text Information System
W.bzsoso.cO Engineering Construction Standard Full Text Information System
Chapter 2 Materials
Section 1 Material Strength Grade
Article 2.1.1 The strength grade of blocks and mortar shall be adopted in accordance with the following provisions: 1. The strength grade of fired ordinary bricks, non-fired silicate bricks and load-bearing hollow clay bricks, etc.: MU30 (300), MU25 (250), MU20 (200), MU15 (150), MU10 (100) and MU7.5 (75). 2. The strength grade of masonry blocks: MU15, MU10, MU7.5, MU5 and MU3.5.
3. The strength grade of stone: MU100, MU80, MU60, MU50, MU40, MU30, MU20, MU15 and MU10.
IV. Strength grade of mortar: M15, M10, M7.5, M5, M2.5, M1 and M0.4.
Note: ① The brackets are the numbers specified in the original standards of the corresponding materials ② The specifications, dimensions and strength grades of stone materials can be determined according to the method in Appendix 1. ③ When determining the strength grade of silicate blocks, the compressive strength of the blocks should be multiplied by the natural carbonization coefficient. For medium-sized solid boron blocks made of fly ash, when there is no natural carbonization coefficient test, 1.15 times the artificial carbonization coefficient can be taken, and it shall not be greater than 0.9.
Section 2 Calculation Index of Masonrywww.bzxz.net
Article 2.2.1 The design values of compressive strength of various masonry calculated based on gross cross-section at an age of 28d shall be adopted according to the following provisions according to the strength grades of blocks and mortar:, the design values of compressive strength of sintered ordinary bricks, non-sintered silicate bricks and load-bearing hollow clay brick masonry shall be adopted according to Table 2.2.1-1. 2. The design value of compressive strength of one-brick-thick hollow bucket body shall be adopted according to Table 2.2.1-2.
3. The design value of compressive strength of concrete small hollow block masonry with block height of 180-350mm shall be adopted according to Table 2.2.1-3. Engineering 2 Construction Standard Full Text Information System
W.bzsoso.coI—The height of the upper section of the variable section column;
-The height of the lower section of the variable section column;
-The calculated span of the beam,
The clear span of the beam;
1——Section moment of inertia;
i——Radius of gyration of the section;
-Section area moment;
u——Section circumference, horizontal displacement;
-Maximum horizontal displacement;
Section resistance moment;
-The distance from the center of gravity of the section to the edge of the section in the direction of the axial force; 2——Internal force arm.
Calculation coefficient
——Partial coefficient of structural member material performance; vo——Structural importance coefficient;
Va——Adjustment coefficient;
——Local compressive strength improvement coefficient, internal force arm coefficient; a——Coefficient;
β——Height-to-thickness ratio of the member;
[B]—Allowable height-to-thickness ratio of a wall or column;
n——Spatial performance influence coefficient, coefficient; 9—Axial force influence coefficient, coefficient;
Full text of engineering construction standards Information System
Engineering Construction Standard Full Text Information System
9—Axial force influence coefficient of mesh reinforced brick masonry components; 9om—Stability coefficient of composite brick masonry components;—Reinforcement ratio,
—Correction coefficient of allowable height-to-thickness ratio of non-load-bearing walls; u2—Correction coefficient of allowable height-to-thickness ratio of walls with door and window openings;—Reduction coefficient;
—Relative height of compression zone of section, coefficient, 56
—Limit value of relative height of compression zone;
s—Local pressure coefficient.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 1 General
Article 1.0.1 This specification is specially formulated in order to implement the technical and economic policies of the state in masonry structure design, adhere to the principle of adapting measures to local conditions and using local materials, reasonably select structural schemes and building materials, and achieve advanced technology, reasonable economy, safety and applicability, and ensure quality.
Article 1.0.2 This code applies to the design of masonry structures of general industrial and civil houses and structures.
Article 1.0.3 This code applies to five-row masonry structures: 1. Brick masonry, including fired ordinary bricks (clay bricks and silicate bricks), non-fired silicate bricks and load-bearing clay hollow brick masonry. 2. Block masonry, including medium-sized and small hollow blocks of concrete and medium-sized solid blocks of fly ash.
3. Stone masonry, including various types of stone and rough stone masonry. Article 1.0.4 This code is formulated in accordance with the principles stipulated in the "Uniform Standard for Design of Building Structures" (GBJ68-84). Article 1.0.5 The design of houses and structures in earthquake zones and under special conditions or with special requirements shall still comply with the provisions of the relevant national standards and specifications currently in force. Engineering Construction Standard Full Text Information System
W.bzsoso.cO Engineering Construction Standard Full Text Information System
Chapter 2 Materials
Section 1 Material Strength Grade
Article 2.1.1 The strength grade of blocks and mortar shall be adopted in accordance with the following provisions: 1. The strength grade of fired ordinary bricks, non-fired silicate bricks and load-bearing hollow clay bricks, etc.: MU30 (300), MU25 (250), MU20 (200), MU15 (150), MU10 (100) and MU7.5 (75). 2. The strength grade of masonry blocks: MU15, MU10, MU7.5, MU5 and MU3.5.
3. The strength grade of stone: MU100, MU80, MU60, MU50, MU40, MU30, MU20, MU15 and MU10.
IV. Strength grade of mortar: M15, M10, M7.5, M5, M2.5, M1 and M0.4.
Note: ① The brackets are the numbers specified in the original standards of the corresponding materials ② The specifications, dimensions and strength grades of stone materials can be determined according to the method in Appendix 1. ③ When determining the strength grade of silicate blocks, the compressive strength of the blocks should be multiplied by the natural carbonization coefficient. For medium-sized solid boron blocks made of fly ash, when there is no natural carbonization coefficient test, 1.15 times the artificial carbonization coefficient can be taken, and it shall not be greater than 0.9.
Section 2 Calculation Index of Masonry
Article 2.2.1 The design values of compressive strength of various masonry calculated based on gross cross-section at an age of 28d shall be adopted according to the following provisions according to the strength grades of blocks and mortar:, the design values of compressive strength of sintered ordinary bricks, non-sintered silicate bricks and load-bearing hollow clay brick masonry shall be adopted according to Table 2.2.1-1. 2. The design value of compressive strength of one-brick-thick hollow bucket body shall be adopted according to Table 2.2.1-2.
3. The design value of compressive strength of concrete small hollow block masonry with block height of 180-350mm shall be adopted according to Table 2.2.1-3. Engineering 2 Construction Standard Full Text Information System
W.bzsoso.coI1. The design values of compressive strength of various masonry calculated based on gross cross-section with an age of 28 days shall be adopted in accordance with the following provisions according to the strength grades of blocks and mortar: 1. The design values of compressive strength of sintered ordinary bricks, non-sintered silicate bricks and load-bearing clay hollow brick masonry shall be adopted according to Table 2.2.1-1. 2. The design values of compressive strength of one-brick thick hollow blocks shall be adopted according to Table 2.2.1-2.
3. The design values of compressive strength of small concrete hollow block masonry with a block height of 180-350mm shall be adopted according to Table 2.2.1-3. Engineering 2 Construction Standard Full-text Information System
W.bzsoso.coI1. The design values of compressive strength of various masonry calculated based on gross cross-section with an age of 28 days shall be adopted in accordance with the following provisions according to the strength grades of blocks and mortar: 1. The design values of compressive strength of sintered ordinary bricks, non-sintered silicate bricks and load-bearing clay hollow brick masonry shall be adopted according to Table 2.2.1-1. 2. The design values of compressive strength of one-brick thick hollow blocks shall be adopted according to Table 2.2.1-2.
3. The design values of compressive strength of small concrete hollow block masonry with a block height of 180-350mm shall be adopted according to Table 2.2.1-3. Engineering 2 Construction Standard Full-text Information System
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