CN205637167U - Bayonet roof beam support node - Google Patents

Abstract

The utility model discloses a bayonet roof beam support node, including H steel beam, and set up the curb plate in H steel beam edge of a wing both sides, be equipped with the stiffener between the board of both sides, on the terminal surface of H steel beam top flange, the symmetry is equipped with support side's pipe of predetermineeing the reinforcing plate between the curb plate of stiffener both sides, constitutes bayonet roof beam support node. 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 plug-in beam support node

technical field

The utility model relates to a plug-in beam support node, which is mainly applied to the steel pipe concrete composite columns of multi-storey and high-rise buildings in building structures.

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 plug-in beam support node with simple construction and low cost, which solves the problem of protruding edges and corners in the traditional column chamber, and improves the bearing capacity and ductility of the multi-cavity steel pipe concrete composite column. 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 plug-in beam support node, comprising an H-shaped steel composite beam, and side plates arranged on both sides of the flange of the H-shaped steel composite beam. A support square tube with a preset reinforcement plate is symmetrically arranged between the side plates of the side plates to form a plug-in beam support node.

Further, the H-shaped steel composite beam includes H-shaped steel, and two pairs of stiffeners arranged on both sides of the H-shaped steel flange, the two pairs of stiffened ribs are flush with the upper and lower flanges of the H-shaped steel, and the two pairs of stiffened ribs are arranged on the sides of the H-shaped steel wing. At the edge of the two side plates where the edge is connected.

Further, the supporting square tube of the preset reinforced side plate includes a supporting square tube, and reinforced side plates arranged on the left and right sides of the end of the supporting square tube, the left and right reinforced side plates are rectangular plates with a right angle cut off on the upper side, and Part of the hypotenuse is attached to one side of the supporting square tube, and is arranged horizontally relative to the bottom edge of the opposite corner where the right-angle part is cut off.

Further, the angle between the supporting square tube and the H-shaped steel composite beam is 30°-60°.

Further, the width of the reinforced side plate is greater than the width of the supporting square tube.

The plug-in beam support node of the utility model can be applied in the support frame system of the multi-cavity steel pipe concrete composite column support plug-in assembly.

The utility model can obtain following beneficial effect:

1) The 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) On the H-shaped steel composite beam, the supporting square tubes of two preset reinforcement plates are clamped by the two side plates, and the horizontal beam (H-shaped steel) and the inclined beam (supporting square tube) are firmly connected as the edge of the entire CFST column Constrained components can improve their bearing capacity and energy dissipation capacity.

3) Weld the preset reinforcing plate on the supporting square tube, and then insert it into the H-shaped steel composite beam as a whole, which improves the bearing capacity and ductility of the component. The structure is applied in the supporting frame system of the multi-cavity concrete-filled steel tube composite column supporting the plug-in assembly, which is convenient for on-site construction, does not damage the multi-cavity steel tube concrete composite column, and saves material and labor.

4) Since the utility model is applied to the multi-cavity steel pipe concrete composite column, the steel pipe has a strong restraint effect on the concrete, and the overall bearing capacity and ductility of the column body are relatively good, and the design requirements of strong columns and weak beams are realized.

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 utility model plug-in beam support node structure;

Figure 2 (a)-(c) is a schematic diagram of the H-shaped steel composite beam structure;

Figure 3 (a)-(b) is a schematic diagram of the supporting square tube structure of the preset reinforcement plate;

Figure 4 (a)-(b) is a schematic diagram of the support node structure of the H-shaped steel composite beam and the inserted support square tube composite beam;

Fig. 5 is a schematic diagram of the support frame system of the multi-cavity concrete filled steel pipe composite column applied in the support plug-in assembly of the present invention.

Fig. 6 is (a)-(c) is the schematic diagram of beam yield failure process;

Fig. 7 is a schematic diagram of the hysteresis curve of a node.

In the figure: 1. Stiffening plate; 2. Side plate; 3. H-shaped steel composite beam; 4. Supporting square tube of preset reinforcing plate; 4-1. Supporting square tube; 4-2. Reinforced side plate; 5. Stiffening rib.

detailed description

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

As shown in Figure 1, the plug-in beam support node of the utility model includes an H-shaped steel composite beam 3, and side plates 2 arranged on both sides of the flange of the H-shaped steel composite beam 3, between the two side plates 2, the H-shaped steel composite A stiffening plate 1 is provided on the end face of the upper flange of the beam 3, and a support square tube 4 with a preset stiffening plate is symmetrically arranged between the side plates 2 on both sides of the stiffening plate 1, forming a plug-in beam support node.

As shown in Figure 2 (a)-(c), the H-shaped steel composite beam 3 of the present utility model includes H-shaped steel, and two pairs of stiffeners 5 arranged on both sides of the H-shaped steel flange, and the upper and lower flanges of the H-shaped steel Flush, two pairs of stiffeners 5 are arranged at the edges of the two side plates connected with the H-shaped steel flange.

As shown in Figure 3 (a)-(b), the supporting square tube of the preset reinforced side plate includes a supporting square tube 4-1, and reinforced side plates 4-1 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 45°. The width of the reinforced side plate 4-2 is greater than the width of the supporting square tube 4-1.

As shown in Figure 4(a)-(b), the installation process of the plug-in beam support node of the utility model is as follows:

First weld the side plates 2 to the H-shaped steel composite beam 3, then weld the stiffening plate 1 to the two side plates along the middle of the Insert at an inclination angle of 30°-60° to meet the requirements of the preset reinforced side plate. The beveled edge of the cut part of the left and right reinforced side plate 4-2 of the supporting square tube is completely attached to the beveled edge of the two side plates, and then the penetration welding method is adopted Connect the left and right reinforced side panels 4-2 to the side panels on both sides, and thus complete the production of the plug-in beam support node.

As shown in Figure 5, the area indicated by the circle is a schematic diagram of the support frame system of the multi-cavity steel pipe concrete composite column that is applied in the support plug-in assembly of the utility model. The upper and lower inclined beams and horizontal beam supports used to support the frame system.

The plug-in beam support node of the utility model can improve its bearing capacity and energy consumption capacity. Because the side plates 2 are welded on the reinforced H-shaped steel composite beam 3 in advance, and the supporting square tube 4 of the preset reinforced side plate is inserted along the stiffened plate 1 at an inclination angle of 45°, the horizontal beam (H-shaped steel) is finally installed on site. It is firmly welded with the inclined beam (supporting square pipe), which is convenient for construction, does not damage the multi-cavity steel pipe concrete composite column, and saves material and labor.

The mechanical performance of the utility model plug-in beam support node will be described below by taking the multi-cavity steel pipe concrete composite column-steel beam U-shaped rigid connection node 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. 6(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. 6(a)-(c). When the external force is large, plastic hinges first appear at the beam end A far away from the joint connection area, as shown in Figure 6(a), the internal force is redistributed, and the bearing capacity of the structure increases; as the external force increases, the beam cover plate B precedes the side Figure 6(b) shows the appearance of plastic hinges in the plate; the final failure of the structure is shown in Figure 6(c). 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 plug-in beam support node of the utility model adopts the form of a multi-cavity steel pipe concrete composite column-steel beam U-shaped rigid joint, adopts the isolation method of the column and the beam end, and transmits the beam through the node connector composed of a full-height side plate and a cover plate 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 7, 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 (5)

1. A plug-in beam support node is characterized in that: comprise H-shaped steel composite beam, and be arranged on the side plates on both sides of the H-shaped steel composite beam flange, between the two side plates, the upper flange end face of the H-shaped steel composite beam is provided with a stiffener The side plates on both sides of the stiffened plate are symmetrically provided with a support square tube with a preset stiffened plate to form a plug-in beam support node. 2. The plug-in beam support node according to claim 1, characterized in that: the H-shaped steel composite beam comprises H-shaped steel, and two pairs of stiffeners arranged on both sides of the flange of the H-shaped steel, and the two pairs of stiffened ribs are connected to the H-shaped steel. The upper and lower flanges of the shaped steel are flush, and two pairs of stiffeners are arranged at the edge of the two side plates connected with the H-shaped steel flange. 3. The plug-in beam support node according to claim 1, characterized in that: the supporting square tube of the preset reinforced side plate includes a supporting square tube, and reinforcing side plates arranged on the left and right sides of the end of the supporting square tube , the left and right reinforced side plates are rectangular plates with right angles cut off on one side of the upper part, the cut part of the hypotenuse fits with one side of the supporting square tube, and the bottom edge of the opposite corner of the cut right angle part is set horizontally. 4. The plug-in beam support node according to claim 3, characterized in that: the angle between the support square tube and the H-shaped steel composite beam is 30°-60°. 5. The plug-in beam support node according to claim 3, characterized in that: the width of the reinforcing side plate is greater than the width of the supporting square tube.