CN202081327U - 1*3I notch steel strand - Google Patents

Abstract

The utility model provides a 1*3I notch steel strand, wherein the steel strand is made by twisting three steel wires, and the three steel wires are two bright steel wires and one notch steel wire; three radial surfaces of the notch steel wire are notched, and every two of the notches of the three surfaces form 120 DEG; and one notch line of the notch steel wire along an axial direction and an adjacent notch line form a reflex angle, and the notch is a parallelogram. The diameter of the steel wires is phi 2.9mm to 6.00mm, and the depth of the notch is 0.03mm to 0.2mm; and the length of the notch is 3mm to 5mm, and the pitch of the notch is 5.0mm to 8.5mm. The utility model has the beneficial effects of enhancement in concrete bond stress, high strength, fine mechanical property and wide application range, and solves the problems of the slippage and the retraction of a core wire and a middle wire.

Description

A kind of 1 * 3I indented steel stranded wire

Technical field

The utility model relates to a kind of building trade prestressing steel technical field, particularly relates to employed 1 * 3I indented steel stranded wire in a kind of prestressed concrete member.

Background technology

Prestressed concrete member in the building trade in order to increase mechanical properties such as member resistance to compression, antidetonation, mostly uses compressor wire or steel strand wires to make arrangement of reinforcement.The quality of the bond stress between its arrangement of reinforcement and the concrete is the key factor of decision prestressed concrete member quality,

The prestressed concrete member of present technology adopts plain steel wire or single rule deforming steel wire or has the steel strand wires that symmetrical indented wire is done or formed by the above steel wire system of twisting is prestressed concrete member adapted master muscle, there are the following problems: 1, the plain steel wire surface is smooth, bond stress is less, 2, the steel strand wires that have the plain steel wire system of twisting to form, only depend on the back pressure stress of the frictional force generation of the non-effective contact between the plain steel wire to concrete component, very easily produce core silk limit portion slippage retraction, cause the minimizing of core silk stress or lose stress fully, restrict the quality and the life-span of prestressed concrete member, and reduced steel strand wires and concrete bond stress; 3, single rule deforming steel wire or the steel strand wires that have symmetrical indented wire or formed by the above steel wire system of twisting, and the bond stress between the concrete is less, especially the former stress is concentrated seriously, causes prestressed concrete member second-rate.

Summary of the invention

The purpose of this utility model is to provide a kind of enhancing and grip of concrete in order to overcome deficiency of the prior art, and the intensity height solves core silk and intermediate filament slippage retraction problems, and mechanical property is good, 1 * 3I indented steel stranded wire of applied range.

The technical scheme that the utility model adopted is: a kind of 1 * 3I indented steel stranded wire, described steel strand wires are formed by three steel wires system of twisting, described three steel wires are two bright steel wires and an indented wire, described indented wire radially three has been worn indentation, three indentations are mutually 120 °, and described indentation is a parallelogram.

Described steel wire diameter is φ 2.9mm-6.00mm, and described width of nick is 0.03mm-0.2mm, and indentation length is 3mm-5mm, and pitch of nick is 5.0mm-8.5mm.

The beneficial effects of the utility model are: increased steel strand wires and concrete bond stress, solved core silk and intermediate filament slippage retraction problems, kept steel strand wires good mechanical performance, improved the prestressed concrete member quality.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model indented wire contour structures schematic diagram.

Wherein: 1, steel strand wires 2, bright steel wire 3, indented wire

4, indentation

The specific embodiment

In order to further specify summary of the invention of the present utility model and characteristics, specify as follows in conjunction with the embodiments:

As shown in Figure 1 and Figure 2, steel strand wires 1 described in the utility model are formed by three steel wires system of twisting, and described three steel wires are two bright steel wires 2 and an indented wire 3, and described indented wire 3 radially three has been worn indentation 4, three indentations 4 are mutually 120 °, and described indentation 4 is a parallelogram.

Described steel wire diameter is φ 2.9mm-6.00mm, and described indentation 4 degree of depth are 0.03mm-0.2mm, and indentation 4 length are 3mm-5mm, and indentation 4 pitches are 5.0mm-8.5mm.

The above only is preferred embodiment of the present utility model, is not scope of the present utility model is limited, and various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the utility model protection domain.

Claims (2)

1. 1 * 3I indented steel stranded wire, it is characterized in that: described steel strand wires are formed by three steel wires system of twisting, and described three steel wires are two bright steel wires and an indented wire, and described indented wire radially three has been worn indentation, three indentations are mutually 120 °, and described indentation is a parallelogram.

2. a kind of 1 * 3I indented steel stranded wire as claimed in claim 1 is characterized in that: described steel wire diameter is φ 2.9mm-6.00mm, and described width of nick is 0.03mm-0.2mm, and indentation length is 3mm-5mm, and pitch of nick is 5.0mm-8.5mm.

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