CN205637168U - Support two curb plate nodes of bayonet support - Google Patents

Abstract

The utility model discloses a support two curb plate nodes of bayonet support, including multicavity steel pipe -concrete composite post, and fix the strenghthened type H steel beam in multicavity steel pipe -concrete composite post one side through two curb plate levels, follow strenghthened type H steel beam's top is inclination and inserts support side's pipe of predetermineeing the reinforcing plate, constitutes support two curb plate nodes of bayonet support with strenghthened type H shaped steel combined supporting, multicavity steel pipe -concrete composite post. This node can improve its bearing capacity and power consumption ability and ductility as the edge restraining component of whole steel core concrete column, on -the -spot construction convenience does not harm multicavity steel pipe -concrete composite post, and it is laborsaving to economize the material. Adopt the steel pipe to have a stronger constraining effect to the concrete, overall structure satisfies the design principle of " strong column and weak beam, the weak component of strong joint ", and the node possesses the multichannel line of providing fortification against earthquakes, avoids destroying because of some member broken lead to whole system, and the while also possesses necessary intensity, good deformability and power consumption ability.

Description

A support plug-in support double-side plate joint

technical field

The utility model relates to a support insertion type support double-side slab node, which is mainly applied to the steel pipe concrete composite columns of multi-storey and high-rise buildings in the building structure.

Background technique

With the economic globalization and the improvement of urbanization level, the urban population density is gradually increasing, which makes a large number of high-rise buildings emerge continuously. There is an urgent need for new technologies to support the design and construction of high-rise and multi-storey buildings.

Concrete filled steel tube utilizes the interaction between the steel tube and concrete in the process of stress, that is, the restraint of the steel tube on the concrete makes the concrete in a complex stress state, so that the strength of the concrete is improved, and the plasticity and toughness are greatly improved. At the same time, after the steel pipe is filled with concrete, the buckling of the steel pipe wall can be avoided or delayed due to the supporting effect of the concrete. The combination of the two materials makes up for their respective shortcomings, making the material performance fully exerted.

With the development of society and the improvement of living standards, people have higher and higher requirements for the usable area and aesthetics of houses. The traditional round or square cross-section concrete-filled steel tube columns are usually not completely surrounded by walls, and a large part of the column feet protrudes from the interior of the room, occupying a certain amount of indoor space, which limits the furniture and room layout to a certain extent. The steel pipe concrete composite column with rectangular cross-section can be as wide as the wall, which solves the problem of protruding edges and corners of the column.

Studies have shown that for the general form of rectangular concrete-filled steel tube composite columns, the constraints of steel tubes on the core concrete are limited to the corner points, weaker at the periphery, and the bearing capacity is relatively low. The multi-cavity concrete-filled steel tube composite column whose end column is a rectangular steel tube is equipped with restraint members at the edge to improve its bearing capacity and energy dissipation capacity. Stiffening and tie measures are arranged laterally to divide the column body into several chambers, so that the restraint effect of the steel plate on the concrete Reinforce, reduce the aspect ratio of the steel plate at the same time, prevent or delay the local buckling of the steel plate.

Utility model content

The purpose of the utility model is to provide a simple construction and low cost steel pipe concrete composite column with stiffening ribs to support the plug-in support double-side plate node, solve the problem of protruding edges and corners in the traditional column room, and improve the performance of the multi-cavity steel pipe concrete composite column. Bearing capacity and ductility. Delay or avoid the reduction of component stiffness, bearing capacity and ductility due to local buckling of the steel pipe wall plate, and give full play to the performance of the material. The overall structure satisfies the design principle of "strong columns and weak beams, strong nodes and weak components". The nodes have multiple seismic fortification lines, and have the necessary strength, good deformation capacity and energy dissipation capacity.

In order to achieve the above object, the utility model adopts the following technical solutions:

A support insert type support double-side slab node, including a multi-cavity steel pipe concrete composite column, and a reinforced H-shaped steel composite beam horizontally fixed on one side of the multi-cavity steel pipe concrete composite column through two side plates, along the reinforced H A supporting square tube with a preset reinforced side plate is inserted above the steel composite beam at an oblique angle, and the reinforced H-shaped steel composite beam and multi-cavity steel pipe concrete composite column form a support insertion type support double side plate node.

Further, the reinforced H-shaped steel composite support beam includes H-shaped steel, and two stiffeners arranged between the steel flanges at the ends of the H-shaped steel, and a pair of H-shaped steel webs are connected along both sides of the H-shaped steel web inside the stiffened ribs. The connectors with flush edges are respectively welded with an upper cover plate and a lower cover plate on the outer sides of the upper and lower flanges of the H-shaped steel.

Further, the connecting piece is an angle steel structure, and bolt holes are distributed on the outer end surface of the angle steel.

Further, the width of the upper cover plate and the lower cover plate is greater than the width of the upper and lower flanges of the H-shaped steel.

Further, the stiffeners are fixed on both sides of the web of the H-shaped steel.

Further, the side plate is a rectangular plate with a hypotenuse, and the hypotenuse is provided above the two extension sections clamped on the multi-cavity concrete-filled steel tube composite column 1 .

Further, the side plate is provided with through holes corresponding to the bolt holes of the connectors.

Further, the supporting square tube of the preset reinforced side plate includes a supporting square tube, and left and right reinforcing side plates arranged on the left and right sides of the end of the supporting square tube. The part of the beveled side is bonded to one side of the supporting square tube, and the bottom edge of the opposite corner of the right-angle part is cut off horizontally, and the supporting square tube is clamped at an inclination angle of 30°-60°.

Further, the width of the left and right reinforcing side plates is greater than the width of the supporting square tube.

The utility model supports and inserts the supporting double-side slab node and can be applied in the supporting frame system of the multi-cavity steel pipe concrete composite column supporting and inserting assembly.

The utility model can obtain following beneficial effects:

1) The reinforced H-shaped steel composite beam and the plug-in composite support are the same width as the multi-cavity steel pipe concrete composite column, which avoids protruding edges and corners of the indoor column, and can increase the usable area and aesthetics of the room.

2) The reinforced H-shaped steel composite beam and the reinforced side plates are preset on both sides of the supporting square tube, and the reinforced side plates are welded to the side plates as the edge restraint member of the entire steel tube concrete column, which can improve its bearing capacity and energy dissipation capacity.

3) Reinforced H-shaped steel composite beams and supporting square tubes with preset reinforced side plates inserted between the double side plates, and then inserted into multi-cavity steel tube concrete composite columns as a whole, which improves the bearing capacity and ductility of the components. The on-site construction is convenient, and the multi-cavity steel pipe concrete composite column is not damaged, saving materials and labor.

4) Due to the use of multi-cavity steel pipe concrete composite columns, the steel pipes have a strong restraint effect on the concrete, and the overall bearing capacity and ductility of the column body are relatively good, which meets the design requirements of strong columns and weak beams.

5) The overall structure satisfies the design principle of "strong columns and weak beams, strong nodes and weak components". The nodes have multiple anti-seismic fortification lines to avoid the damage of the overall system due to the damage of some components, and also have the necessary strength and good deformation capacity and energy consumption.

Description of drawings

Fig. 1 is a schematic diagram of the node structure of the support plug-in support double-side plate of the utility model;

Figure 2 (a)-(c) is a schematic structural view of the reinforced H-shaped steel composite beam;

Figure 3 (a)-(b) is a schematic structural view of the multi-cavity concrete filled steel tube composite column with side plates;

Figure 4(a)-(b) is a schematic diagram of the supporting square tube structure of the preset reinforced side plate;

Figure 5(a)-(d) is a schematic diagram of the joint structure of reinforced H-shaped steel composite support and inserted support and multi-cavity steel pipe concrete composite column;

Fig. 6 is a schematic diagram of the multi-cavity concrete filled steel pipe composite column support frame system applied to the support insertion assembly of the utility model;

Fig. 7 is (a)-(c) is the schematic diagram of beam yield failure process;

Fig. 8 is a schematic diagram of the hysteresis curve of a node.

In the figure: 1. Multi-cavity steel pipe concrete composite column; 2. Side plate; 3. Reinforced H-shaped steel composite beam; 3-1, H-shaped steel; 3-2, upper cover plate; 3-3, stiffening rib; 3- 4. Lower cover plate; 3-5. Connecting piece; 4. Preset support square tube for reinforced side plate; 4-1. Support square tube; 4-2. Reinforced side plate.

detailed description

Below in conjunction with specific embodiment the utility model is described in further detail.

As shown in Figure 1, the utility model supports the plug-in support double-side slab node, including the multi-cavity steel pipe concrete composite column 1, and the reinforced H that is horizontally fixed on one side of the multi-cavity steel pipe concrete composite column 1 through two side plates 2 The steel composite beam 3 is inserted into the supporting square tube 4 with the preset reinforced side plate at an inclined angle along the top of the reinforced H-shaped steel composite beam 3, and the supporting square tube 4 of the preset reinforced side plate is connected with the reinforced H-shaped steel composite beam 3. The multi-cavity concrete-filled steel tube composite column 1 constitutes a support plug-in support double-side plate node.

As shown in Figure 2 (a)-(c), the reinforced H-shaped steel composite support beam 3 of the present utility model includes H-shaped steel 3-1, and two steel flanges arranged between the ends of the H-shaped steel 3-1. A stiffening rib 3-3, the stiffening rib 3-3 is welded on both sides of the web of the H-shaped steel 3-1, and a pair of H-shaped steel 3-1 is welded along both sides of the web of the H-shaped steel 3-1 inside the stiffening rib 3-3. 1 The connectors 3-5 with flush edges are respectively welded with an upper cover plate 3-2 and a lower cover plate 3-4 on the outer sides of the upper and lower flanges of the H-shaped steel 3-1. Wherein, the connecting piece 3-5 is an angle steel structure, and bolt holes are distributed on the outer end surface of the angle steel. The width of the upper cover plate 3-2 and the lower cover plate 3-4 is greater than the width of the upper and lower flanges of the H-shaped steel 3-1.

As shown in Figure 3(a)-(b), side plates 2 are fixed on both sides of the multi-cavity steel pipe concrete composite column of the present invention, and side plates 2 are provided with through holes corresponding to the bolt holes of connecting parts 3-5 . It is convenient to be fixedly connected with the reinforced H-shaped steel composite beam 3. The side plate 2 is a rectangular plate provided with hypotenuses, and the hypotenuses are arranged above the two extended sections clamped on the multi-cavity concrete-filled steel tube composite column 1 .

As shown in Figure 4 (a)-(b), the supporting square tube of the preset reinforced side plate includes a supporting square tube 4-1, and a reinforced side plate 4-1 arranged on the left and right sides of the end of the supporting square tube 4-1 2. The left and right reinforced side plates 4-2 are rectangular plates with right angles cut off on the upper side, and part of the hypotenuse is cut off to fit with one side of the supporting square tube. The square tube is clamped at an inclination angle of 30°-60°. The width of the reinforced side plate 4-2 is greater than the width of the supporting square tube 4-1. The reinforced side plate 4-2 is welded and fixed to the supporting square tube by means of fillet welds.

As shown in Figure 5(a)-(d), the installation process of the support plug-in support double-side plate node of the utility model is as follows:

1) Position the side plate 2 on both sides of the multi-cavity concrete-filled steel tube composite column 1 first, and then weld the side plate and the multi-cavity steel tube together by using three-sided fillet welds;

2) Insert the pre-assembled reinforced H-shaped steel composite beam 3 between the side panels on both sides, temporarily fix the reinforced H-shaped steel composite beam 3 and the two side panels by tightening the mounting bolts, and then connect the side panels with the upper and lower cover panels and Connector welding;

3) Insert the prefabricated supporting square tubes of the preset reinforced side plates between the two side plates to meet the requirements of the hypotenuse and the cut-off part of the left and right reinforced side plates 4-2 of the supported square tubes of the preset reinforced side plates. The hypotenuses of the plates are fully fitted, and then the left and right reinforced side plates 4-2 are connected to the side plates on both sides by penetration welding to complete the installation of the supporting plug-in supporting double side plate nodes.

As shown in Figure 6, the area indicated by the circle is a schematic diagram of the multi-cavity steel pipe concrete composite column support frame system applied in the support insertion assembly of the utility model. Single incline beams and horizontal beam braces used to support the frame system.

The support plug-in support double-side plate node of the utility model can improve its bearing capacity and energy consumption capacity. Because the two side panels 2 are provided with the support upper cover plate 4 and the support lower cover plate 6 in advance, then the support square tube 5 is inserted, and it is convenient to insert the slanted beam (support square tube 5) on the spot, without damage Multi-cavity steel pipe concrete composite column saves material and labor.

The mechanical properties of the utility model support plug-in support double-side plate joint will be described below by taking the multi-cavity steel pipe concrete composite column-steel beam U-shaped rigid joint joint as a column.

Using ABAQUS software to conduct finite element analysis on the joints, the joint column is a 200x600 multi-cavity concrete-filled steel pipe composite column, the beam is made of H350x150x6x10 welded I-beam, and the thickness of both side plates and cover plates at the joint is the same as that of the beam flange. The results of finite element analysis are shown in Fig. 7(a)-(c).

Due to the use of multi-cavity steel pipe concrete composite columns, the steel pipes have a strong restraint effect on the concrete, and the overall bearing capacity and ductility of the column body are relatively good, which meets the design requirements of strong columns and weak beams. The failure sequence of multi-cavity CFST composite column-steel beam U-shaped rigid joints is shown in Fig. 7(a)-(c). When the external force is large, plastic hinges first appear at the beam end A away from the joint connection area, as shown in Fig. 7(a), the internal force is redistributed, and the bearing capacity of the structure increases; Figure 7(b) shows plastic hinges in the plate; the final failure of the structure is shown in Figure 7(c), the beam end flange buckles, and the upper and lower sides C of the side plate yield in a large area, but the side plate does not form a plastic hinge, and the structure still has certain The energy dissipation capacity meets the design requirements of strong nodes and weak members.

The utility model is based on the principle of seismic concept design. The structure should have multiple seismic fortification lines to avoid the damage of the whole system due to the damage of some components. At the same time, it also requires that the structure should have the necessary strength, good deformation capacity and energy dissipation capacity. The utility model's supporting plug-in supporting double-side plate joint adopts the multi-cavity steel pipe concrete composite column-steel beam U-shaped rigid connection joint form, adopts the isolation method of the column and the beam end, and uses the node connector composed of the full-height side plate and the cover plate To transmit the beam end bending moment and shear force. When an earthquake occurs, plastic hinges first appear at the end of the beam, which consumes a certain amount of seismic energy to form the first seismic fortification line, and then plastic hinges appear on the cover plate to further dissipate the seismic energy to form the second seismic fortification line, and the side panels finally form Plastic hinges form the third seismic fortification line. The overall structure meets the design principle of "strong columns and weak beams, strong nodes and weak components", and the energy dissipation performance of the structure is relatively good. As shown in Figure 8, the hysteresis curve of the node is full, without obvious pinch phenomenon, the energy dissipation capacity of the node is good, and the deformation is large. When the earthquake comes, the residents have more time to escape.

The above content is a further detailed description of the utility model in conjunction with specific preferred embodiments. It cannot be determined that the specific embodiment of the utility model is limited to this. Under the premise of the new concept, some simple inferences or replacements can also be made, which should be regarded as belonging to the utility model and the scope of patent protection determined by the submitted claims.

Claims (9)

1. A support plug-in support double-side slab node is characterized in that: it comprises a multi-cavity steel tube concrete composite column, and a reinforced H-shaped steel composite beam fixed on one side of the multi-cavity steel tube concrete composite column by two side plates horizontally, A supporting square tube with a preset reinforced side plate is inserted at an inclined angle above the reinforced H-shaped steel composite beam, and the reinforced H-shaped steel composite beam and the multi-cavity steel tube concrete composite column form a support insertion type supporting double side plate node. 2. The supporting plug-in support double-side plate node according to claim 1, characterized in that: the reinforced H-shaped steel composite beam includes H-shaped steel, and two stiffeners arranged between the shaped steel flanges at the ends of the H-shaped steel Ribs, along both sides of the H-shaped steel web on the inner side of the stiffener, are connected with a pair of connectors flush with the edge of the H-shaped steel, and the upper and lower cover plates are respectively welded on the outer sides of the upper and lower flanges of the H-shaped steel. 3. The supporting insert type supporting double-sided plate node according to claim 2, characterized in that: the connecting piece is an angle steel structure, and bolt holes are distributed on the outer end surface of the angle steel. 4. The supporting plug-in supporting double-side plate node according to claim 2, characterized in that: the width of the upper and lower cover plates is greater than the width of the upper and lower flanges of the H-shaped steel. 5. The support-inserted support double-side plate node according to claim 2, characterized in that: the stiffeners are fixed on both sides of the web of the H-shaped steel. 6. The supporting plug-in supporting double-side slab node according to claim 1, characterized in that: the side slab is a rectangular slab with a hypotenuse, and the hypotenuse is set on two multi-cavity steel pipe concrete composite columns above the extension. 7. The support-inserted support double-side plate node according to claim 1, characterized in that: the side plate is provided with through holes corresponding to the bolt holes of the connectors. 8. The supporting plug-in supporting double-sided plate node according to claim 1, characterized in that: the supporting square tubes of the preset reinforced side plates include supporting square tubes, and the left and right sides of the ends of the supporting square tubes Reinforced side panels, the left and right reinforced side panels are rectangular panels with right angles cut off on the upper side, part of the hypotenuse cut off is attached to one side of the supporting square tube, and the bottom edge of the opposite corner of the right angle part cut off is set horizontally, and the supporting square Tube clamping is 30°-60° inclined angle. 9. The supporting insert type supporting double-side plate node according to claim 8, characterized in that: the width of the left and right reinforcing side plates is greater than the width of the supporting square tube.