CECS : 3892 Code for Design and Construction of Steel Fiber Reinforced Concrete Structures CECS38:92
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Engineering Construction Standards Full-text Information System
CECS38:92
Standards of China Association for Engineering Construction Standardization
SPECIFICATION FOR DESIGNAND
CONSTRUCTION
REINFORCED
CONCRETE
Engineering Construction Standards Full-text Information System
STRUCTURES
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Standards of China Association for Engineering Construction Standardization||tt ||Design and Construction Code for Steel Fiber Concrete Structures CECS38:92
Main Editor: Dalian University of Technology
Harbin Institute of Civil Engineering
China Association for Engineering Construction Standardization
Approval Unit:
Approval Date: June 4, 1992
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
This code is based on the Notice No. 10 of China Association for Engineering Construction Standardization (88) Jianbiaozi, edited by Dalian University of Technology and Harbin Institute of Civil Engineering, and 12 units participated in the compilation team.
Since December 1988, the compilation team has conducted an investigation and summary of the scientific research and engineering application results in China over the past ten years. At the same time, more than ten special experimental studies were carried out, drawing on relevant foreign standards and research and application results, and widely soliciting opinions from relevant units and experts across the country. After repeated revisions, it was finally reviewed and finalized by the National Technical Committee for Reinforced Concrete Standards.
This code consists of nine chapters and two appendices. The main contents include: materials, basic design regulations, ultimate limit state calculation of unreinforced and reinforced steel fiber concrete components, verification of the normal use ultimate limit state of reinforced steel fiber concrete components, structural construction regulations, preparation, pouring and inspection of steel fiber concrete, design and construction of sprayed fiber concrete projects, and design and construction of some commonly used projects and components. These commonly used projects and components include: highway pavement, airport pavement, road and bridge deck, industrial building ground, rigid waterproof roof, composite bending member, railway sleeper, local reinforced precast pile and seismic frame node. Since steel fiber concrete has a wide range of applications and involves concrete structure design specifications of different professions, this code pays special attention to the principle of facilitating coordinated use with different professional specifications when compiling.
This code adopts the symbols, measurement units and basic terms specified in GBJ83-85 "General Symbols, Measurement Units and Basic Terms for Building Structure Design". When used in conjunction with the concrete structure design and construction specifications of various professions, attention should be paid to their correspondence and conversion relationship.
In order to improve the quality of the regulations, please pay attention to summarizing experience and accumulating data in the process of applying this regulation. If you find that there are places that need to be modified or supplemented, please send your opinions and relevant materials to the Department of Civil Engineering of Dalian University of Technology (zip code 116024) for future revisions. China Association for Engineering Construction Standardization
June 4, 1992
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Main Symbols
Chapter 1 General Provisions·
Chapter 2
Materials·
Section 1
Section 2
Section 3
Chapter 3
Chapter 4
Steel Fiber·
Steel Fiber Concrete
Basic Design Provisions
.. .......
Bearing capacity limit state calculation.
Section 1
Section 2
(sub))
Section 3
General provisions for calculation of unreinforced steel fiber concrete structural members
Calculation of compression members..
Calculation of bending members......
Local compression calculation
Positive section of reinforced steel fiber concrete members
Bearing capacity calculation
General provisions
Calculation of bending bearing capacity of positive section
Positive section Calculation of bearing capacity under compression
Calculation of bearing capacity under shear of reinforced steel fiber concrete members...
Calculation of bearing capacity under punching of reinforced steel fiber concrete slabs
Section 4
Calculation of bearing capacity under shear.·
Section 5
Calculation of bearing capacity under local compression of reinforced steel fiber concrete members
Normal use of reinforced steel fiber concrete membersChapter 5
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....12
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Limit state calculation
Section 1 Crack resistance calculation
Section 2 Crack width calculation·
Section 3 Deformation calculation
Chapter 6 Structural provisions of reinforced steel fiber concrete structure
Preparation, pouring of steel fiber concrete
Chapter 7
And inspection
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Chapter 8
Section 2
Section 3|| tt||Section 4
Section 5
Section 6
Section 7
Section 8
Chapter 9
General Provisions
Raw Materials
Mix Design
Mixing...
Transportation, Casting and Maintenance
Quality Inspection
Design and Construction of Steel Fiber Concrete Structure Engineering
Highway Pavement and Airport Pavement
Highway and Urban Road Bridge Deck
Industrial Building Ground··|| tt||Rigid waterproof roof·
Composite flexural member·
-General provisions·
Bearing capacity calculation
Reinforcement stress and crack width verification
Deformation verification
Railway sleepers
Locally reinforced precast piles
Seismic frame nodes
Design and construction of sprayed steel fiber concrete structure engineering
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Engineering construction standard full text information system
Section 1
General provisions|| tt||Section 2
Sprayed steel fiber concrete support design
Section 3
Sprayed steel fiber concrete structure construction, sprayed steel fiber concrete repair and reinforcement project Section 4
Appendix 1
Technology of steel fiber for steel fiber concrete
Terms used in this code
Appendix 2
Additional explanation
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Main Symbols
Material Properties
0--represents the standard value of cubic strength of 20N/mm2 concrete C20, CF20
soil, steel fiber concrete strength grade;
--design value of axial compressive strength of steel fiber concrete; fte
ftem--design value of bending compressive strength of steel fiber concrete; fu, ft--standard value and design value of compressive strength of steel fiber concrete; according to the strength grade of steel fiber concrete, according to the current relevant concrete f, f.
Standard value and design value of tensile strength determined by the concrete structure design code;
Design value of flexural strength of steel fiber concrete;ftm
ftm--Design value of flexural strength of plain concrete of the same strength grade; Design value of flexural fatigue strength of steel fiber concrete;ftm
Design value of bending tensile strength of equivalent rectangular stress diagram in the tension zone of reinforced steel fiber concrete components;
fy, f'y
Design values of tensile and compressive strength of ordinary steel bars;fw
Design value of tensile strength of stirrups.
Action and effect
N——Design value of axial force;
Design value of axial bearing capacity of reinforced steel fiber concrete compression member;
Design value of local compressive bearing capacity of steel fiber concrete: Nu——Design value of local compressive bearing capacity calculated according to the strength grade of steel fiber concrete and the current relevant concrete structure design specifications;
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Nrpu——Design value of local punching shear bearing capacity of reinforced steel fiber concrete slab Value; Npu is the design value of the local shear bearing capacity of reinforced concrete slabs calculated according to the current concrete structure design specifications based on the strength grade of steel fiber concrete;
Mu is the design value of the bending bearing capacity of the positive section of reinforced steel fiber concrete members; Mer
is the anti-cracking moment value of the positive section of reinforced steel fiber concrete members; Mer
is the anti-cracking moment value of the positive section of reinforced concrete members calculated according to the current concrete structure design specifications based on the strength grade of steel fiber concrete;
is the anti-cracking moment value of the inclined section of reinforced steel fiber concrete members The design value of shear force borne by steel fiber concrete and stirrups on the inclined section;
The design value of shear bearing capacity mainly borne by concrete on the inclined section of the member calculated according to the current relevant concrete structure design specifications based on the axial compressive strength of steel fiber concrete;
Vs-the design value of shear bearing capacity mainly borne by stirrups on the inclined section of the member calculated according to the current relevant concrete structure design specifications; Vtu
The design value of shear bearing capacity of steel fiber concrete seismic frame nodes; The stress of longitudinal tensile reinforcement in composite flexural members under the combination of short-term load effects ;
The maximum crack width of reinforced steel fiber concrete components considering the influence of crack width non-uniformity and long-term load effects;The maximum crack width of reinforced concrete components calculated according to the strength grade of steel fiber concrete in accordance with the current relevant concrete structure design specifications;
The short-term stiffness of reinforced steel fiber concrete bending components under the combined action of short-term load effects;
The short-term stiffness of reinforced concrete components under the combined action of short-term load effects calculated according to the strength grade of steel fiber concrete in accordance with the current relevant concrete structure design specifications.
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as, as
Geometric parameters
Distance from the resultant force point of longitudinal tensile non-prestressed steel bars, the resultant force point of compression steel bars to the near side of the section;
Rectangular section width, web width of T-shaped and I-shaped sections; column section width;
Width of horizontal section at the node;
Thickness of concrete cover layer;
Reinforcement diameter;
Steel fiber diameter or equivalent diameter;
Distance from the axial force application point to the resultant force point of longitudinal tensile steel bars; column section height; thickness of ordinary concrete layer on the ground of industrial buildings: effective height of section;
Height of horizontal section at the node;
Thickness of steel fiber concrete thickening layer on highway pavement or airport pavement; Assuming that an equivalent plain concrete layer is built on the base of the original pavement or pavement The required thickness of the soil single-layer slab, and its flexural strength is the design value of the flexural strength of the thickened layer of steel fiber concrete;
Assuming that an equivalent plain concrete single-layer slab is built on the base of the original road surface or pavement, the required thickness, and its flexural strength is the design value of the flexural strength of the original pavement concrete;
The thickness of the original cement concrete pavement or pavement; The thickness of the steel fiber concrete pavement or industrial building floor; The length of steel fiber;
The anchorage length of the longitudinal reinforcement of reinforced concrete components; The anchorage length of the longitudinal reinforcement of reinforced steel fiber concrete components; The anchorage length of the longitudinal reinforcement of the beam in the seismic node; The spacing of spiral bars or stirrups along the axis of the component; The height of the tensile zone of the equivalent rectangular stress figure; x
The height of the compressive zone of the equivalent rectangular stress figure; Engineering Construction Standard Full-text Information System
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The cross-sectional area of the longitudinal tensile and compressive reinforcements; The cross-sectional area of the stirrups.
Calculation coefficients and others
Influence coefficient of steel fiber on tensile strength of steel fiber concrete; Influence coefficient of steel fiber on flexural strength of steel fiber concrete; Influence coefficient of steel fiber on local compressive bearing capacity of steel fiber concrete members;
Influence coefficient of steel fiber on tensile action of steel fiber concrete in tensile zone of reinforced steel fiber concrete bending members;
Influence coefficient of steel fiber on shear capacity of concrete on inclined section of reinforced steel fiber concrete bending members;
Influence coefficient of steel fiber on punching bearing capacity of reinforced steel fiber concrete slab;
Influence coefficient of steel fiber on cracking moment of reinforced steel fiber concrete beam
Influence coefficient of steel fiber on crack width of reinforced steel fiber concrete member;
Influence coefficient of steel fiber on short-term stiffness of reinforced steel fiber concrete bending member;
Influence coefficient of steel fiber on tensile stress of longitudinal reinforcement of composite bending member;
Characteristic parameters of steel fiber content;
Relative height of compression zone;
Relative height of limit compression zone;
Constraint influence coefficient of beam on node;
Volume ratio of steel fiber;
Vebe consistency value;
Water-cement ratio of concrete mixture.
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Chapter 1 General
Article 1.0.1 This code is specially formulated to implement the national technical and economic policies in the design and construction of steel fiber concrete structures, to achieve advanced technology, reasonable economy, safety and applicability, and to ensure quality.
Article 1.0.2 Steel fiber concrete is suitable for structural engineering or its local parts with high requirements for tensile, shear, flexural strength and crack resistance, impact resistance, fatigue resistance, earthquake resistance, explosion resistance and other performances.
This code is applicable to the design and construction of steel fiber concrete structures made of round straight, melt-drawn, shear-type steel fibers and ordinary concrete; when other types of steel fibers are used to make steel fiber concrete structures, their design and construction should be carried out according to special tests or technical demonstrations.
This code is not applicable to the design and construction of steel fiber concrete structures made of heat-resistant concrete and lightweight concrete.
Note: ① Steel fiber concrete refers to a composite material composed of short, discontinuous steel fibers uniformly and randomly dispersed in concrete;
Steel fiber concrete structures can be divided into unreinforced steel fiber concrete structures, reinforced steel fiber concrete structures and prestressed steel fiber concrete structures. Article 1.0.3 This code only stipulates the special requirements for the design and construction of steel fiber concrete structures that are different from concrete structures. When designing and constructing steel fiber concrete structures according to this code, the following current concrete structure design and construction specifications shall be met according to the type of project to which the structure belongs: national standard "Concrete Structure Design Specification" GBJ10-89 and current national standard "Concrete Structure Engineering Construction and Acceptance Specification"; Ministry of Communications standard "Port Engineering Technical Specification: Concrete and Reinforced Concrete Design" JTJ220-87 and "Concrete and Reinforced Concrete Construction" JTJ221-87; former Ministry of Water Resources standard "Water Conservancy Reinforced Concrete Structure Design Specification" SDJ20-78 Engineering Construction Standard Full Text Information SystemArticle 3 This code only stipulates the special requirements for steel fiber concrete structure design and construction that are different from concrete structure. When designing and constructing steel fiber concrete structure according to this code, it should also comply with the following current relevant concrete structure design and construction specifications according to the engineering category to which the structure belongs: national standard "Concrete Structure Design Specification" GBJ10-89 and current national standard "Concrete Structure Engineering Construction and Acceptance Specification"; Ministry of Transport standards "Port Engineering Technical Specification: Concrete and Reinforced Concrete Design" JTJ220-87 and "Concrete and Reinforced Concrete Construction" JTJ221-87; former Ministry of Water Resources and Electric Power standard "Water Conservancy Reinforced Concrete Structure Design Specification" SDJ20-78 Engineering Construction Standard Full Text Information SystemArticle 3 This code only stipulates the special requirements for steel fiber concrete structure design and construction that are different from concrete structure. When designing and constructing steel fiber concrete structure according to this code, it should also comply with the following current relevant concrete structure design and construction specifications according to the engineering category to which the structure belongs: national standard "Concrete Structure Design Specification" GBJ10-89 and current national standard "Concrete Structure Engineering Construction and Acceptance Specification"; Ministry of Transport standards "Port Engineering Technical Specification: Concrete and Reinforced Concrete Design" JTJ220-87 and "Concrete and Reinforced Concrete Construction" JTJ221-87; former Ministry of Water Resources and Electric Power standard "Water Conservancy Reinforced Concrete Structure Design Specification" SDJ20-78 Engineering Construction Standard Full Text Information SystemArticle 3 This code only stipulates the special requirements for steel fiber concrete structure design and construction that are different from concrete structure. When designing and constructing steel fiber concrete structure according to this code, it should also comply with the following current relevant concrete structure design and construction specifications according to the engineering category to which the structure belongs: national standard "Concrete Structure Design Specification" GBJ10-89 and current national standard "Concrete Structure Engineering Construction and Acceptance Specification"; Ministry of Transport standards "Port Engineering Technical Specification: Concrete and Reinforced Concrete Design" JTJ220-87 and "Concrete and Reinforced Concrete Construction" JTJ221-87; former Ministry of Water Resources and Electric Power standard "Water Conservancy Reinforced Concrete Structure Design Specification" SDJ20-78 Engineering Construction Standard Full Text Information SystemArticle 3 This code only stipulates the special requirements for steel fiber concrete structure design and construction that are different from concrete structure. When designing and constructing steel fiber concrete structure according to this code, it should also comply with the following current relevant concrete structure design and construction specifications according to the engineering category to which the structure belongs: national standard "Concrete Structure Design Specification" GBJ10-89 and current national standard "Concrete Structure Engineering Construction and Acceptance Specification"; Ministry of Transport standards "Port Engineering Technical Specification: Concrete and Reinforced Concrete Design" JTJ220-87 and "Concrete and Reinforced Concrete Construction" JTJ221-87; former Ministry of Water Resources and Electric Power standard "Water Conservancy Reinforced Concrete Structure Design Specification" SDJ20-78 Engineering Construction Standard Full Text Information SystemArticle 2 Steel fiber concrete is suitable for structural engineering or its local parts with high requirements for tensile, shear, flexural strength and crack resistance, impact resistance, fatigue resistance, earthquake resistance, explosion resistance and other performances.
This code is applicable to the design and construction of steel fiber concrete structures made of round straight, melt-drawn, shear-type steel fibers and ordinary concrete; when other types of steel fibers are used to make steel fiber concrete structures, their design and construction should be carried out according to special tests or technical demonstrations.
This code is not applicable to the design and construction of steel fiber concrete structures made of heat-resistant concrete and lightweight concrete.
Note: ①Steel fiber concrete refers to a composite material composed of short, discontinuous steel fibers uniformly and randomly dispersed in concrete;
Steel fiber concrete structures can be divided into unreinforced steel fiber concrete structures, reinforced steel fiber concrete structures and prestressed steel fiber concrete structures. Article 1.0.3 This code only stipulates the special requirements for the design and construction of steel fiber concrete structures that are different from concrete structures. When designing and constructing steel fiber concrete structures according to this code, the following current concrete structure design and construction specifications shall be met according to the type of project to which the structure belongs: national standard "Concrete Structure Design Specification" GBJ10-89 and current national standard "Concrete Structure Engineering Construction and Acceptance Specification"; Ministry of Communications standard "Port Engineering Technical Specification: Concrete and Reinforced Concrete Design" JTJ220-87 and "Concrete and Reinforced Concrete Construction" JTJ221-87; former Ministry of Water Resources standard "Water Conservancy Reinforced Concrete Structure Design Specification" SDJ20-78 Engineering Construction Standard Full Text Information SystemArticle 2 Steel fiber concrete is suitable for structural engineering or its local parts with high requirements for tensile, shear, flexural strength and crack resistance, impact resistance, fatigue resistance, earthquake resistance, explosion resistance and other performances.
This code is applicable to the design and construction of steel fiber concrete structures made of round straight, melt-drawn, shear-type steel fibers and ordinary concrete; when other types of steel fibers are used to make steel fiber concrete structures, their design and construction should be carried out according to special tests or technical demonstrations.
This code is not applicable to the design and construction of steel fiber concrete structures made of heat-resistant concrete and lightweight concrete.
Note: ①Steel fiber concrete refers to a composite material composed of short, discontinuous steel fibers uniformly and randomly dispersed in concrete;
Steel fiber concrete structures can be divided into unreinforced steel fiber concrete structures, reinforced steel fiber concrete structures and prestressed steel fiber concrete structures. Article 1.0.3 This code only stipulates the special requirements for the design and construction of steel fiber concrete structures that are different from concrete structures. When designing and constructing steel fiber concrete structures according to this code, the following current concrete structure design and construction specifications shall be met according to the type of project to which the structure belongs: national standard "Concrete Structure Design Specification" GBJ10-89 and current national standard "Concrete Structure Engineering Construction and Acceptance Specification"; Ministry of Communications standard "Port Engineering Technical Specification: Concrete and Reinforced Concrete Design" JTJ220-87 and "Concrete and Reinforced Concrete Construction" JTJ221-87; former Ministry of Water Resources standard "Water Conservancy Reinforced Concrete Structure Design Specification" SDJ20-78 Engineering Construction Standard Full Text Information System
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