CN202047300U - 1*3I indented steel strand - Google Patents

Abstract

The utility model provides a 1*3I indented steel strand. Three steel wires which are in diameters of 2.9 mm to 6.00 mm and with indentation are twisted into the steel strand. The three steel wires are composed of a smoothly surfaced steel wire and two indented steel wires. Three surfaces of each of the two indented steel wires along a radial direction are provided with indentation. And the indentation on every two of the three surfaces mutually forms 120 degrees. The indentation is in a parallelogram shape with a depth of 0.03 mm to 0.2 mm, a length of 3 mm to 5 mm and a pitch of 5.0 mm to 8.5 mm. The 1*3I indented steel strand in the utility model has beneficial effects of strong grip of concrete, high strength and good mechanical property. The 1*3I indented steel strand solves the slipping or retracting problem of a core wire or an intermediate wire and can be widely applied.

Description

A kind of 1 * 3I steel strand wires with indentation

Technical field

The utility model relates to a kind of building trade prestressing steel technical field, particularly relates to 1 * 3I steel strand wires of employed band indentation 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 steel strand wires of the band indentation of applied range.

The technical scheme that the utility model adopted is: a kind of 1 * 3I steel strand wires with indentation, the steel wire system of twisting that described steel strand wires are φ 2.9mm-6.00mm by three diameters forms, described three steel wires are a bright steel wire and two indented wires, described indented wire radially three has been worn indentation, three indentations are mutually 120 °, and described indentation is a parallelogram, and width of nick is 0.03mm-0.2mm, 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, the steel wire system of twisting that steel strand wires 1 described in the utility model are φ 2.9mm-6.00mm by three diameters forms, described three steel wires are a bright steel wire 2 and two indented wires 3, described indented wire 3 radially three has been worn indentation 4, three indentations 4 are mutually 120 °, and described indentation 4 is a parallelogram, and indentation 4 degree of depth are 0.03mm-0.2mm, 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 (1)

1. 1 * 3I steel strand wires with indentation, it is characterized in that: the steel wire system of twisting that described steel strand wires are φ 2.9mm-6.00mm by three diameters forms, described three steel wires are a bright steel wire and two indented wires, described indented wire radially three has been worn indentation, three indentations are mutually 120 °, and described indentation is a parallelogram, and width of nick is 0.03mm-0.2mm, indentation length is 3mm-5mm, and pitch of nick is 5.0mm-8.5mm.

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