GB/T 31314-2014Multi wires of large diameter strand with high-strength and low-relaxation strand for prestressing (English PDF)
多丝大直径高强度低松驰预应力钢绞线
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 5, 2014
Implementation date
September 1, 2015
Scope
GB/T 31314-2014 is the English-translated version of 多丝大直径高强度低松驰预应力钢绞线.
GB/T 31314-2014 is the Chinese standard "Multi wires of large diameter strand with high-strength and low-relaxation strand for prestressing".
Its scope clause reads: This standard specifies the 1 × 19 class, 17.8mm ~ 28.6mm multifilament large diameter high-strength low-relaxation prestressing strand diameter of surgery Terms and definitions, code and markup, ordering the content, size, shape, weight and tolerances, heavy plate, disc diameter, technical requirements, test methods, inspection regulations Then, packaging, marking and quality certificate.
This standard applies to bridges, high-rise buildings, large venues, rock anchoring, anchoring applications in the field of roadway multifilament large diameter high-strength low loose Relaxation prestressing strand (hereinafter referred to as "strand"). Its clauses include terms and definitions.
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Document preview — GB/T 31314-2014
National Standard of the People's Republic of China
- ICS
- 77.140.65
- Classification
- H 49
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 code and mark
- 5 order contents
- 6 size, shape, weight and tolerances
- 7 3 Technical requirements
- 9 6 Inspection Rules
- 10 packaging, marking and quality certificate
1 Scope
This standard specifies the 1 × 19 class, 17.8mm ~ 28.6mm multifilament large diameter high-strength low-relaxation prestressing strand diameter of surgery
Terms and definitions, code and markup, ordering the content, size, shape, weight and tolerances, heavy plate, disc diameter, technical requirements, test methods, inspection regulations
Then, packaging, marking and quality certificate.
This standard applies to bridges, high-rise buildings, large venues, rock anchoring, anchoring applications in the field of roadway multifilament large diameter high-strength low loose
Relaxation prestressing strand (hereinafter referred to as "strand").
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 21839 Test Method for prestressed concrete steel
GB/T 24238 and prestressed steel wire strand with a hot rod
Determining rounding and detection values YB/T 081 standard metallurgical technical value
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Multi-wire prestressing strand
Strand made 19 cold-drawn steel wire twisted into a circle of light.
3.2 Or West prestressed strand
Composed of two identical light the number of cold-drawn round wire parallel strand twisted steel.
3.3 Wallin swallow prestressed strand
Twisted strand made of inner and outer circle of light cold-drawn steel wire parallel. The thickness of the outer layer of the two diameters of the wires are arranged alternately composition, and an outer
Layer filaments total root number is twice the number of inner wires.
3.4 Strand nominal diameter
Strand circumscribed circle diameter nominal size.
3.5 Stabilization treatment
To reduce the use of stress relaxation, strand under a certain tension in the short-term heat treatment.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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