1 General Provisions
1.0.1 This specification is formulated with a view to regulating the application of rebar mechanical splicing in concrete structure engineering, achieving safety and usability, advanced technology, economy and rationality and ensuring quality.
1.0.2 This specification is applicable to design, construction and acceptance of rebar mechanical splicing in concrete structure in construction engineering.
1.0.3 Rebars used for mechanical splicing shall meet the requirements of current standards of the nation Steel for the Reinforcement of Concrete - Part 2: Hot Rolled Ribbed Bars (GB 1499.2), Remained Heat Treatment Ribbed Steel Bars for the Reinforcement of Concrete (GB 13014), Stainless Steel Rebar Used for Reinforced Concrete (YB/T 4362) and Steel for the Reinforcement of Concrete - Part 1: Hot Rolled Plain Bars (GB 1499.1).
1.0.4 Rebar mechanical splicing shall not only comply with this specification, but also comply with those in the current relevant ones of the nation.
2 Terminologies and Symbols
2.1 Terminologies
2.1.1 Rebar mechanical splicing
Connection method transmitting the force in one rebar to another through mechanical lock effect of rebar and connectors of mechanical splicing or other intervention materials or pressure-bearing effect of rebar end face.
2.1.2 Splice
Shortened form of rebar mechanical splice of whole set for rebar mechanical splicing.
2.1.3 Connectors of mechanical splicing
All components used for connecting rebar, including coupler or sleeve and other assemblies.
2.1.4 Coupler or sleeve
Steel sleeve used for transmitting axial pressure or pressure of rebars.
2.1.5 Rebar threaded sector
Threaded segment of rebar end in splice.
2.1.6 Length of mechanical splice
The sum of length of splice connectors of mechanical splicing and that of the cross-section change segment of rebars on both ends of connectors of mechanical splicing; the exposed threaded sector and the upsetting transition section of threaded splice belong to section change segment.
2.1.7 Tensile strength of splice
Maximum tensile stress value reached by splice sample in the process of tensile test.
2.1.8 Residual deformation of splice
Deformation of splice sample measured within specified gauge length, after loading and unloading are carried out according to specified loading system.
2.1.9 Total elongation of splice sample at maximum tensile force
Total elongation of splice sample at maximum force and measured within specified gauge length.
2.1.10 Area percentage of splice
Area percentage of mechanical splice of longitudinal load-bearing rebar within the same connection segment is the ratio of longitudinal load-bearing rebars with mechanical splice to cross-sectional areas of all longitudinal rebars within the segment; in case connection is carried out by using rebars with different diameters, it shall be calculated according to the rebars with smaller diameters.
Foreword i
1 General Provisions
2 Terminologies and Symbols
2.1 Terminologies
2.2 Symbols
3 Performance Requirements of Splice
4 Splice Applications
5 Type Test of Splice
6 On-site Machining and Installing of Splices
6.1 General Requirements
6.2 Machining of Rebar Threaded Sector
6.3 Installing of Splices
7 On-site Inspection and Acceptance of Splices
Appendix A Test Methods for Splice Samples
Appendix B Report Format of Type Test for Splice Sample
Explanation of Wording in This Specification
List of Quoted Standards
