CN201221153Y - Cold bending thin wall crimping channel steel provided with cross baffle - Google Patents

Abstract

The utility model relates to a steel structural member commonly used in building structures, bridge structures, storage structures and various equipment steadiers, in particular to a cold-formed thin-walled lipped channel provided with diaphragm plates. The cold-formed thin-walled lipped channel comprises a web plate, flanges and turned edges; wherein, a plurality of diaphragm plates which are vertical to the length direction of the lipped channel are arranged inside the section of the lipped channel; and the peripheries of the diaphragm plates are respectively connected with the web plate, the flanges and the turned edges. Compared with the original formed steel, the lipped channel has larger distortional buckling critical load, as a result, the bearing capability of the formed steel is enhanced, and the properties of the material can be sufficiently utilized in order to achieve more economic and applicable purposes. Test results and a numerical calculation analysis indicate that after the technical scheme is adopted, the distortional buckling load of the cold-formed thin-walled lipped channels of the same type can be increased by 24 percent or more, thereby, the bearing capability of the formed steels is enhanced, and the properties of the material can be sufficiently utilized.

Description

The cold bending thin wall lipped channel of diaphragm is set

Technical field

The utility model relates to steel member commonly used in a kind of building structure, bridge construction, storage structures and the various device support, is specifically related to a kind of cold bending thin wall lipped channel that diaphragm is set.

Background technology

China from output of steel in 1996 broken hundred million tons leap to the No. 1 in the world since, kept continuously 12 years.Steel enlarge day by day in the range of application of China, and quantity grows with each passing day.Considering to improve the technical-economic index of material, is must needing that current market is growing, competition becomes more fierce.Therefore, the application of light gauge cold-formed steel shape in building structure, bridge construction, storage structures and various device support is increasingly extensive, and this can be saved and use material, two can alleviate deadweight, be convenient to transportation and install, thereby reduce comprehensive cost.In the clod wash thin-wall open section steel, lipped channel is the most extensive in actual application in engineering, both can make post (comprising axial compression and bending component), also can make beam (flexural member), or other members.

But when the wall thickness of cold bending thin wall lipped channel member is thin, under pressure or moment of flexure or pressure and moment of flexure acting in conjunction, cripling or distortional buckling take place easily by theory analysis and experimental study as can be known; Intensity is higher after the flexing of cripling, and intensity is very low after the flexing of distortional buckling.Therefore,, will worsen the stress of member, reduce the total bearing capacity of member greatly, the performance of material can not be fully utilized in case distortional buckling takes place.At present, in China's design specifications or the actual engineering design, usually avoid the generation of distortional buckling, cause the advantage of " steel using amount province " this light-gauge steel section to demonstrate fully by the wall thickness of restriction lipped channel member.

The utility model content

In order to solve in the existing engineering design, the total bearing capacity that distortional buckling reduces member greatly because of taking place in the cold bending thin wall lipped channel, this outstanding problem that the performance of material can not be fully utilized, the utility model provide a kind of and handle through structure---the cold bending thin wall lipped channel of diaphragm is set.

The technical scheme that the utility model is taked is:

A kind of cold bending thin wall lipped channel that diaphragm is set is provided, comprises web, the edge of a wing, crimping, in inside, lipped channel cross section some diaphragms perpendicular to the lipped channel length direction are set, the diaphragm periphery is connected with web, the edge of a wing and crimping respectively.

As a kind of improvement, the maximum spacing between the adjacent diaphragm is no more than half (can equal half-wavelength half) of the distortional buckling half wavelength lambda of this lipped channel;

The distortional buckling half wavelength lambda of described lipped channel is calculated according to following formula:

$\mathrm{\λ}=3.48b{\left(\frac{h}{b}\right)}^{0.15}{\left(\frac{b}{t}\right)}^{-0.20}{\left(\frac{d}{t}\right)}^{0.70}$

In the formula: h, b, d and t are respectively the height of lipped channel web, the width on the edge of a wing, the height of crimping and the wall thickness of lipped channel, and unit is mm.

As a kind of improvement, diaphragm adopts the Q235-A steel to make, its thickness be the lipped channel flange width 1/50 with the lipped channel wall thickness in higher value, the cross sectional shape and the size of its flat shape and size and lipped channel adapt.

As a kind of improvement, spot welding (generally spot welding gets final product, but should notice that crimping must be connected with diaphragm) or intermittent fillet weld are adopted in being connected between diaphragm periphery and web, the edge of a wing and the crimping.

As a kind of improvement, the distance between the adjacent diaphragm equates (or arranging as the case may be).

The beneficial effects of the utility model are:

The utility model has bigger distortional buckling critical load than the original shaped steel of same model, thereby improves the supporting capacity of this shaped steel, and the performance of material is fully utilized to reach purpose more economical, that be suitable for.Result of the test and numerical Analysis show, adopted technique scheme after, the distortional buckling load of same model cold bending thin wall lipped channel (considering the existence of actual defects) can improve 24% or more than; Improved the supporting capacity of shaped steel, the performance of material is fully utilized.

Description of drawings

Fig. 1: the lipped channel schematic diagram that diaphragm is set

Fig. 2: lipped channel is at the sectional drawing at A-A place among Fig. 1

Reference numeral: web 1, the edge of a wing 2, crimping 3, diaphragm 4, spot welding 5.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

As shown in Figure 1, diaphragm cold bending thin wall lipped channel is set, comprise web 1, with two edges of a wing 2 up and down and the crimping 3 of web one, at the inner diaphragm 4 that is provided with perpendicular to the channel-section steel length direction of channel cross-section, being connected of 3 of diaphragm 4 periphery and web 1, the edge of a wing 2 and crimpings, can adopt spot welding or intermittent fillet weld.

Maximum spacing between the adjacent diaphragm 4 is no more than half (can equal half-wavelength half) of the distortional buckling half-wavelength of this lipped channel.

The distortional buckling half wavelength lambda of cold bending thin wall lipped channel can be calculated by following formula:

$\mathrm{\λ}=3.48b{\left(\frac{h}{b}\right)}^{0.15}{\left(\frac{b}{t}\right)}^{-0.20}{\left(\frac{d}{t}\right)}^{0.70}---\left(1\right)$

In the formula, h, b, d and t are respectively web 1 height, the edge of a wing 2 width, crimping 3 height and the wall thickness of lipped channel, and unit is mm.

Diaphragm 4 can adopt the Q235-A steel to make, the higher value in 1/50 and the lipped channel wall thickness of the desirable lipped channel of its thickness edge of a wing 2 width, and cross sectional shape, the size of its flat shape, size and lipped channel adapt.

As shown in Figure 2, a cold bending thin wall lipped channel, web 1 height h=120mm, the edge of a wing 2 width b=100mm, crimping 3 height d=12mm and wall thickness t=1.5mm.

By formula (1) calculates the half wavelength lambda=662mm of this lipped channel generation distortional buckling, gets 650mm; Member length is got 1500mm.Diaphragm 4 adopts the Q235 steel plate, and planar dimension is 115mm * 95mm; 1/50 of the lipped channel edge of a wing 2 width are b/50=100/50=2mm＞wall thickness t=1.5mm, are 2mm so get block board thickness.

The spacing of compressed member being got diaphragm 4 respectively is s=325mm (=λ/2) and 217mm (=λ/3); The spacing that flexural member is got diaphragm 4 respectively be s=650mm (=λ) and 325mm (=λ/2).Result of the test gathers and sees Table 1.Relatively as seen, after this lipped channel was provided with above-mentioned diaphragm 4, the distortional buckling load was significantly improved, and increase rate is relevant closely with the value of diaphragm 4 distance s: when getting s=λ=650mm (flexural member), increase rate is 11.8%; When getting s=λ/2=325mm, increase rate is 24.3～43.5%; When getting s=λ/3=217mm (compressed member), increase rate is 40.0～52.95%.Take all factors into consideration structure and economic dispatch factor, diaphragm distance s≤λ/2 are got in suggestion.

Table 1 adds the distortional buckling loading test value of the forward and backward cold bending thin wall lipped channel of diaphragm

Claims (5)

1, a kind of cold bending thin wall lipped channel that diaphragm is set, comprise web, the edge of a wing, crimping, it is characterized in that in inside, lipped channel cross section some diaphragms perpendicular to the lipped channel length direction are set, the diaphragm periphery is connected with web, the edge of a wing and crimping respectively.

2, the cold bending thin wall lipped channel that diaphragm is set as claimed in claim 1 is characterized in that, the maximum spacing between the adjacent diaphragm is no more than half of distortional buckling half wavelength lambda of this lipped channel;

The distortional buckling half wavelength lambda of described lipped channel is calculated according to following formula:

$\mathrm{\λ}=3.48b{\left(\frac{h}{b}\right)}^{0.15}{\left(\frac{b}{t}\right)}^{-0.20}{\left(\frac{d}{t}\right)}^{0.70}$

In the formula: h, b, d and t are respectively the height of lipped channel web, the width on the edge of a wing, the height of crimping and the wall thickness of lipped channel, and unit is mm.

3, the cold bending thin wall lipped channel of diaphragm is set as claimed in claim 1 or 2, it is characterized in that, diaphragm adopts the Q235-A steel to make, its thickness be the lipped channel flange width 1/50 with the lipped channel wall thickness in higher value, the cross sectional shape and the size of its flat shape and size and lipped channel adapt.

4, the cold bending thin wall lipped channel that diaphragm is set as claimed in claim 1 or 2 is characterized in that, is connected employing spot welding or intermittent fillet weld between diaphragm periphery and web, the edge of a wing and the crimping.

5, the cold bending thin wall lipped channel that diaphragm is set as claimed in claim 1 or 2 is characterized in that, the distance between the adjacent diaphragm equates.

Images