CN203145194U

CN203145194U - Internal diaphragm joint of variable flange steel I-beam and square concrete filled steel tubular column

Info

Publication number: CN203145194U
Application number: CN 201320111675
Authority: CN
Inventors: 王来; 王瑞刚; 尹艳霞
Original assignee: Shandong University of Science and Technology
Current assignee: Shandong University of Science and Technology
Priority date: 2013-03-12
Filing date: 2013-03-12
Publication date: 2013-08-21
Anticipated expiration: 2023-03-12

Abstract

The utility model discloses an inner diaphragm joint between an I-shaped steel beam with a variable flange and a square concrete-filled steel tube column. The steel pipes are respectively welded with internal partitions; the flange at the end of the I-shaped steel beam is a constant-width flange, and the flange after the constant-width flange to the flange connected with the square steel pipe concrete column is a variable-width flange The cross-section of the variable-width flange is isosceles trapezoidal, the slope of the isosceles trapezoidal slope is 1:2.5, and the horizontal width of the slope is 1/10 to 1/5 of the width of the constant-width flange. The utility model strengthens the flange by changing the width of the flange, forcing the plastic hinge to appear on the beam at a distance from the beam-column node, thereby protecting the node, avoiding brittle failure caused by the deterioration of the deformation capacity of the node, and increasing the ductility of the structure, which is beneficial Realize the design idea of stronger nodes.

Description

Become edge of a wing steel I-beam and concrete-filled steel square tubular column internal partition type node

Technical field

The utility model belongs to a kind of steel and concrete combined structure, is the joint form that a kind of concrete-filled steel square tubular column is connected with girder steel.

Background technology

Using more in the steel-concrete combined structure is encased structures, so-called encased structures be exactly pour into concrete in the steel pipe and tamping to add the strength and stiffness of big steel pipe.This structure has been given full play to the strong point of steel pipe and two kinds of materials of concrete, has bearing capacity height, plasticity and advantages such as good toughness, easy construction, is widely used in structures such as individual layer and multi storied industrial factory building post, highrise building and bridge.This year particularly, along with the promotion and application of steel structure of housing, the frame structure that forms with steel core concrete column and girder steel ties up to and is applied gradually in the engineering practice and develops, and has obtained good economic benefit and social benefit.At present, it is through that the connected node form of the concrete-filled steel square tubular column of China and girder steel mainly contains external partition formula, internal partition formula and dividing plate.The through node of its median septum requires concrete-filled steel square tubular column bottom flange correspondence position on girder steel to block, diaphragm is welded in the relevant position after, weld former square steel pipe again.This node construction complexity, weld seam is more concentrated, uses less in China.But these concrete-filled rectangular steel tube frame construction joint structures are close with steel framed structure, therefore, also have problems such as node ductility is poor, welding residual stress is big, occur brittle fracture under geological process equally easily.Studies show that, by the control beam-ends plastic hinge seismic energy that can dissipate, prevent from causing collapsing of structure because connected node destroys, thereby reduce earthquake greatly, be conducive to antidetonation.Realize seismic design the applying in actual engineering of ductility joint, significant.

Summary of the invention

In order to promote the application in highrise building of steel and concrete combined structure, the utility model provides a kind of change edge of a wing steel I-beam and concrete-filled steel square tubular column internal partition type node that is conducive to structural seismic, this contact i.e. effectively transfer beams end shear and moment of flexure, can effectively control beam-ends again and form plastic hinge, seismic energy better dissipates.Become the edge of a wing girder steel end edge of a wing that is connected with concrete-filled steel square tubular column and be wider than other parts of girder steel; wide and narrow straight transitions; reinforcement by the beam-ends edge of a wing forces plastic hinge to occur at the beam of distance bean column node one segment distance, thereby the protection node is realized the design principles of " node is stronger ".

In order to realize above-mentioned joint form, the utility model take technical scheme be:

A kind of change edge of a wing steel I-beam and concrete-filled steel square tubular column internal partition type node: it comprises i-shape steel beam and concrete-filled steel square tubular column, in the square steel pipe at place, the upper and lower edge of a wing of i-shape steel beam, be welded with internal partition respectively, it is characterized in that, the edge of a wing that described i shaped steel beam end is one section is for waiting width edge of a wing, be degree of the broadening edge of a wing afterwards to the one section edge of a wing that is connected with concrete-filled steel square tubular column on the width edge of a wing, the cross section on degree of the broadening edge of a wing is isosceles trapezoid, the gradient on isosceles trapezoid slope is 1:2.5, and the horizontal width on slope is for waiting 1/10-1/5 of width flange width.

Terminological interpretation: the horizontal width on above-mentioned isosceles trapezoid slope refers to half of the long difference of going to the bottom on the isosceles trapezoid.The gradient on above-mentioned isosceles trapezoid slope refers to the horizontal width on isosceles trapezoid slope and the ratio of isosceles trapezoid height;

Useful benefit of the present utility model is:

Change the reinforcement edge of a wing by flange width; force plastic hinge to occur at the beam of distance bean column node one segment distance, thereby the protection node is avoided because the brittle fracture that the deterioration of node deformability causes; increase the ductility of structure, be conducive to realize the design philosophy of " node is stronger ".Under geological process, better dissipation energy.Simultaneously, the welding internal partition effectively transmits the beam-ends moment of flexure, compares the external partition joint form, has advantages such as power transmission is direct, saving steel, assurance architectural space.Thinking ratio with other internal partition formula node, can effectively control plastic hinge and form the zone, and reduce on-the-spot installation procedure, is a kind of simple structure, and power transmission is clear and definite, the simple novel joint form of constructing.

Description of drawings

Fig. 1 is schematic perspective view of the present utility model;

Fig. 2 is front view of the present utility model;

Fig. 3 vertical view of the present utility model.

Among the figure: the 1-concrete-filled steel square tubular column; The 2-i-shape steel beam; The 3-internal partition; The vertical junction plate of 4-; The 5-high-strength bolt; The 6-weld seam; The width edges of a wing such as 7-; 8-degree of the broadening edge of a wing.

The horizontal width on b representative slope, cross section, degree of the broadening edge of a wing, the height on L representative slope, cross section, degree of the broadening edge of a wing

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

As shown in Figure 1, the utility model totally comprises i-shape steel beam 2 and concrete-filled steel square tubular column 1, is welded with internal partition 3 respectively in the square steel pipe at place, the upper and lower edge of a wing of i-shape steel beam,

As can be seen from Figures 2 and 3: the edge of a wing of described i-shape steel beam 2 is not the wide edge of a wing, that is to say: the edge of a wing that i-shape steel beam 2 ends are a section waits the width edge of a wing 7 to be degree of the broadening edge of a wing 8 afterwards to the one section edge of a wing that is connected with concrete-filled steel square tubular column 1 for waiting width edge of a wing 7; As can be seen from Figure 3, the cross section on degree of the broadening edge of a wing 8 is isosceles trapezoid, requires: the horizontal width b on isosceles trapezoid slope is for waiting 1/10～1/5 of the width edge of a wing 7 width; The gradient on isosceles trapezoid slope is b:L=1:2.5.

During enforcement, the last bottom flange of i-shape steel beam 2 connects with adopting groove butt weld 6 being connected of concrete-filled steel square tubular column 1, and the web of i-shape steel beam 2 connects by being welded on the vertical junction plate 4 on the concrete-filled steel square tubular column 1 and with high-strength bolt 5.Concrete-filled steel square tubular column 1 and the groove butt welding of internal partition 3 along i-shape steel beam 2 edge of a wing in-planes and concrete-filled steel square tubular column 1; Square steel pipe adopts the butt weld of groove to be welded by four block plates, and the concrete that build square steel pipe inside is ordinary concrete, high-strength concrete or self-compacting concrete.

Claims

1. one kind becomes edge of a wing steel I-beam and concrete-filled steel square tubular column internal partition type node, it comprises i-shape steel beam and concrete-filled steel square tubular column, on i-shape steel beam, be welded with internal partition respectively in the square steel pipe at place, bottom flange, it is characterized in that, the edge of a wing that described i shaped steel beam end is one section is for waiting width edge of a wing, be degree of the broadening edge of a wing afterwards to the one section edge of a wing that is connected with concrete-filled steel square tubular column on the width edge of a wing, the cross section on degree of the broadening edge of a wing is isosceles trapezoid, the gradient on isosceles trapezoid slope is 1:2.5, and the horizontal width on slope is for waiting 1/10～1/5 of width flange width.