CN2780401Y - Connecting nodal point of box-shaped steel column and I-steel beam - Google Patents

Abstract

The utility model relates to a connecting nodal point of a box-shaped steel column and an I-shaped steel beam, which is characterized in that the utility model comprises a box-shaped steel column (1), an I-shaped steel beam (2) and slot-shaped stiffening plates (3), wherein the box-shaped steel column (1) comprises a cold bending moment steel tube column, a hot rolling square billet steel column and a box-shaped section column welded by four steel plates, and the I-shaped steel beam (2) comprises a welded I-shaped steel beam and a hot rolling I-shaped steel beam; the height of the slot-shaped stiffening plates (3) is the same as the width of a flange (5) of the box-shaped steel column, the two slot-shaped stiffening plates are respectively welded on the external surfaces of an upper and a lower flanges of the I-shaped steel beam (2), the tips of the two slot-shaped stiffening plates (3) are opposite, and the I-shaped steel beam (2) and the slot-shaped stiffening plates (3) are connected with the flange (5) of the box-shaped steel column. The nodal point of the utility model avoids the problems of the difficult construction of a built-in diaphragm plate and the oversize deformation of column flanges, and the externally arranged stiffening plate is used for effectively moving the plastic hinge of the nodal point outwards.

Description

Box steel column and I-steel beam connecting node

Technical field

The utility model belongs to steel structure girder and column connected node field, being connected of box steel column and i section steel beam particularly, be applicable to various built-in diaphragm plates constructions relatively difficulty and the box steel column that need reinforce node area and the connected node of i section steel beam.

Background technology

For being rigidly connected of Liang Yuzhu, when post is box steel column, because the width than the I-steel flange of beam is big usually for the width on the box steel column edge of a wing, if stiffener not being set in the corresponding box steel column of I-steel flange of beam is built-in diaphragm plate, the beam-ends moment of flexure can make the box steel column flange plate be subjected to curved and produce significantly distortion, does not satisfy rigidly connected requirement.The method that adopts at present mostly for fear of above-mentioned situation is that stiffener is set in box steel column is built-in diaphragm plate.

Built-in diaphragm plate construction method commonly used at present, when box steel column is cold-formed rectangular tube-steel column, be that cold-formed rectangular tube-steel column is blocked at the main shaft place of I-steel beam section, diaphragm plate be welded in corresponding position, and then cold-formed rectangular tube-steel column is welded together; When box steel column is the box section post of four block plates welding, be that built-in diaphragm plate and three wallboards are welded earlier, the welding of the 4th wallboard and diaphragm plate can only be from the outside be chewed electroslag welding and solves with melting.The construction of built-in diaphragm plate is very inconvenient as can be seen for we.The measure that the utility model consideration is put more energy into from the outside promptly adopts external stiffener to solve problems such as excessive, the built-in diaphragm plate constructional difficulties of box steel column edge of a wing distortion.

Summary of the invention

The utility model has proposed to replace with external stiffener the solution of built-in diaphragm plate at problems such as diaphragm plate constructional difficulties are set in the box steel column.

The utility model provides the connected node of a kind of box steel column and i section steel beam, it is characterized in that, this node includes box steel column 1, i section steel beam 2 and flute profile stiffener 3, and described box steel column 1 comprises the box section post of cold-formed rectangular tube-steel column, hot rolling square billet steel column, the welding of four block plates; Described i section steel beam 2 comprises the i section steel beam and the hot rolling i-shape steel beam of welding; The height h of described flute profile stiffener 3 is identical with the width on the box steel column edge of a wing 5, and the length of flute profile stiffener 3 is greater than A/ (1.4h _f), satisfy being not less than 200mm simultaneously, be not more than 4h _f, leg width b is greater than A/ (2t), less than half of i section steel beam deck-molding; Wherein A is the area with the I-steel flange of beam of flute profile stiffener welding, h _fBe the leg size, t is a flute profile stiffener leg thickness; Two flute profile stiffeners 3 are welded in the outer surface on the i section steel beam 2 upper and lower edges of a wing respectively with angle welding, and make the acropodium of two flute profile stiffeners 3 relative; The edge of a wing of i section steel beam 2 and flute profile stiffener 3 adopt the welding of complete penetraction and fusion in welding groove with the edge of a wing 5 of box steel column; The web of i section steel beam 2 adopts angle welding or bolt to be connected with the edge of a wing of box steel column 5.

Flute profile stiffener 3 adopts the hot-rolled steel channel that is complementary with the box steel column edge of a wing 5 width; When the height h of hot-rolled steel channel and the box steel column edge of a wing 5 width are not complementary, adopt the flute profile stiffener 3 of welding.Length according to finite element analysis suggestion flute profile stiffener 3 is not less than 200mm, while is according to the restriction of angle welding length, the length of flute profile stiffener 3 is not more than 40 times fillet weld size, determines the length of flute profile stiffener 3 and the minimum of a value of leg width b according to the principle of equal strength.The edge of a wing of i section steel beam 2 and flute profile stiffener 3 adopt the welding of complete penetraction and fusion in welding groove with the edge of a wing 5 of box steel column, and specific practice is with reference to " construction steel structure solder technology rules ".The leg size of fillet weld h of i section steel beam 2 and 3 welding of flute profile stiffener _f, when the thick t ' of I-steel flange of beam＞6mm, h _f≤ t '-(1～2); When the thick t ' of I-steel flange of beam≤6mm, h _f≤ t '; The web of i section steel beam 2 adopts angle welding to be connected the leg size h of angle welding with the edge of a wing of box steel column 5 _fSatisfy $1.5\sqrt{{\mathrm{<figure-callout\; id="2"\; label="t"\; filenames="Y20052000563200061.png"\; state="\{\{state\}\}">t</figure-callout>}}_2}\&le;h_f\&le;{1.2\mathrm{<figure-callout\; id="1"\; label="t"\; filenames="Y20052000563200061.png"\; state="\{\{state\}\}">t</figure-callout>}}_1,$ T wherein ₁Be the web thickness of i section steel beam 2 and the smaller value of the box steel column edge of a wing 5 thickness, t ₂Be both higher values.

The surrender of flute profile stiffener 3 before this headed by this utility model failure mode in most of the cases is web 4 flexural deformations of box steel column then.Yet web 4 flexural deformations of box steel column are very disadvantageous for the antidetonation principle of strong column and weak beam, also be that we do not expect, the method that solves is web 4 outside welding steels at box steel column, with this thickness that increases box steel column web 4, reaches better anti seismic efficiency.The utility model node also has good use for reference of planning to the strengthening reconstruction of box steel column and I-steel beam connecting node.

Three characteristics of the utility model node: one), avoided the problem of the built-in diaphragm plate constructional difficulties of box steel column by adopting the connected node of outer stiffener.Two) redistribute the I-steel flange of beam effectively and acted on stress on the box steel column edge of a wing, thereby solved the excessive problem of box steel column edge of a wing distortion well.Three) in the steel structure earthquake-resistant design, the beam-column connection design that the consideration plastic hinge moves outward more and more is subjected to structure's teacher favor.Plastic hinge moves two kinds of basic forms outward, the end of buttress brace and weaken beam section is local.One of method of the end of buttress brace is exactly to add cover plate at the place, top flange of beam, and the effect of cover plate has been played in the design of the external stiffener of the utility model node simultaneously.

Description of drawings

Fig. 1 is the three-view diagram of box steel column and I-steel beam connecting node.Wherein (a) is front view, (b) is side view, (c) is vertical view.Among Fig. 1,1, box steel column, 2, i section steel beam, 3, the flute profile stiffener, 4, the box steel column edge of a wing, 5, the box steel column web.

Fig. 2 is a flute profile stiffener sectional view, and wherein b is the leg width, and h is a height, and t is a leg thickness.

Fig. 3 is the upper and lower edge of a wing of i section steel beam and the complete penetraction and fusion in welding welding structure detail drawing of box steel column

The specific embodiment

Describe an instantiation of the present utility model in detail below in conjunction with accompanying drawing, box steel column adopts cold-formed rectangular tube-steel column, and i section steel beam adopts the hot rolling i-shape steel beam.

Cold-formed rectangular tube-steel column 1 sectional dimension is 250 * 250 * 10mm, i-shape steel beam 2 sectional dimensions are 300 * 145 * 6.5 * 10.2mm, in order to realize the utility model node, the height of getting flute profile stiffener 3 is the width in cold-formed rectangular tube-steel column 1 cross section, and the sectional dimension of choosing flute profile stiffener 3 from the shaped steel specification table is 250 * 80 * 9 * 12mm.

Referring to Fig. 1, flute profile stiffener 3 adopts the angle welding welding with i-shape steel beam 2, and the throat of fillet weld is taken as 8mm; I-shape steel beam 2 adopts angle welding to be connected with flute profile stiffener 3, and the leg size is taken as 7mm.The web of i-shape steel beam 2 is of a size of the 7mm angle welding with cold-formed rectangular tube-steel column 1 employing leg and is connected.The length of flute profile stiffener 3 is got 300mm, and practice shows the length of flute profile stiffener 3, and the peak load that box steel column and i shaped steel beam connecting node be can bear has certain influence.

Two flute profile stiffeners 3 are welded in the outer surface on the i-shape steel beam 2 upper and lower edges of a wing respectively with angle welding, and make the acropodium of two flute profile stiffeners 3 relative, i-shape steel beam 2 just is welded as a whole with flute profile stiffener 3 like this, and then this whole is connected with cold-formed rectangular tube-steel column 1, the edge of a wing of i-shape steel beam 2 and flute profile stiffener 3 adopt the welding of complete penetraction and fusion in welding groove with cold-formed rectangular tube-steel column 1, and way is seen Fig. 3.

When the box section post is the box section post of hot rolling square billet steel column, four block plates welding, i section steel beam is during for the welding i-shape steel beam, and the enforcement of the utility model node is the same.

Claims (2)

1, the connected node of a kind of box steel column and i section steel beam, it is characterized in that, this node includes box steel column (1), i section steel beam (2) and flute profile stiffener (3), and described box steel column (1) comprises the box section post of cold-formed rectangular tube-steel column, hot rolling square billet steel column, the welding of four block plates; Described i section steel beam (2) comprises the i section steel beam and the hot rolling i-shape steel beam of welding; The height h of described flute profile stiffener (3) is identical with the width of the box steel column edge of a wing (5), and the length of flute profile stiffener (3) is greater than A/ (1.4h _f), satisfy being not less than 200mm simultaneously, be not more than 40h _f, leg width b is greater than A/ (2t), less than half of i section steel beam deck-molding; Wherein A is the area with the I-steel flange of beam of flute profile stiffener welding, h _fBe the leg size, t is a flute profile stiffener leg thickness; Two flute profile stiffeners (3) are welded in the outer surface on the upper and lower edge of a wing of i section steel beam (2) respectively with angle welding, and make the acropodium of two flute profile stiffeners (3) relative; The edge of a wing of i section steel beam (2) and flute profile stiffener (3) adopt the welding of complete penetraction and fusion in welding groove with the edge of a wing (5) of box steel column; The web of i section steel beam (2) adopts angle welding or bolt to be connected with the edge of a wing (5) of box steel column.

2, the connected node of box steel column according to claim 1 and i section steel beam, flute profile stiffener (3) adopts the hot-rolled steel channel that is complementary with box steel column (1) flange width; When the height of hot-rolled steel channel and box steel column (1) flange width are not complementary, adopt the flute profile stiffener (3) of welding.

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