CN203977609U - A kind of energy consumer stage by stage - Google Patents

Abstract

The utility model discloses a stage-by-stage energy dissipator, which comprises a top plate and a bottom plate opposite to each other in parallel, and an energy-dissipating steel sheet is arranged between the top plate and the bottom plate; A second-stage energy-dissipating steel sheet, and two second-stage energy-dissipating steel sheets are set on both sides with the first-stage energy-dissipating steel sheet as the center line; the material yield point of the first-stage energy-dissipating steel sheet is higher than or lower than The yield point of the material of the energy-dissipating steel sheet in the second stage; the energy-dissipating steel sheet is provided with a parabola-shaped hole, and a group of parabolas with the same opening size and two opposite openings form a parabolic-shaped hole, and the symmetry axis of the parabola is parallel to the top plate And it is located in the middle of the energy-dissipating steel sheet; the parabolic hole on the energy-dissipating steel sheet at the first stage is larger than the parabolic hole on the energy-dissipating steel sheet at the second stage. The utility model has the advantages of simple design and manufacture, convenient installation and replacement, stable hysteresis performance, relatively low cost and energy consumption in stages.

Description

A staged energy consumer

technical field

The utility model relates to the field of vibration prevention in construction engineering, in particular to a vibration damping device for suppressing the structural vibration response of engineering structures under the action of earthquake and wind vibration.

Background technique

Low-yield-point steel has a lower yield point, which is beneficial for the energy dissipation device to enter yield energy before the structural members, and has good plasticity, ductility and hysteresis performance, so it has good and stable energy dissipation capacity. Due to the above advantages, low yield point steel is especially suitable as anti-seismic steel, and has gradually been recognized and valued by the industry, and has become a new and key steel type for anti-seismic steel. With the gradual rise of low-yield point steel materials and the development and application of passive control theory at the end of the 20th century, low-yield point steel energy dissipators began to be widely used in the renovation and reinforcement of existing buildings and the energy dissipation and shock absorption design of new buildings. So far, there have been many types of low-yield point steel energy dissipators come out.

With the development of the industry, the fatigue resistance of existing low-yield point steel energy dissipators often cannot meet the high requirements of modern buildings. At the same time, it also exposes the problems of complex structure, cumbersome installation and replacement, and many of them are relatively expensive. high defect.

Utility model content

Technical problem to be solved: Aiming at the deficiencies of the prior art, the utility model proposes a staged energy dissipator based on low yield point steel to solve the problem of poor fatigue resistance, complex structure, Installation and replacement are cumbersome and expensive technical problems.

Technical solution: In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A staged energy dissipator, comprising a top plate and a bottom plate facing each other in parallel, an energy dissipating steel sheet is arranged in the middle of the top and bottom plates, and the energy dissipating steel sheet is connected to the top and bottom plates; the energy dissipating steel sheets include mutually parallel One first-stage energy-dissipating steel sheet and two second-stage energy-dissipating steel sheets, the two second-stage energy-consuming steel sheets are set on both sides with the first-stage energy-dissipating steel sheet as the midline, and the second-stage The width of the first-stage energy-dissipating steel sheet is greater than the width of the second-stage energy-dissipating steel sheet; the yield point of the material of the first-stage energy-dissipating steel sheet is lower than the yield point of the material of the second-stage energy-dissipating steel sheet; There are holes in the form of parabolas on the energy-dissipating steel sheet. A group of parabolas with the same opening size and opposite openings form a parabola-shaped hole. The symmetry axis of the parabola is parallel to the top plate and located in the middle of the energy-dissipating steel sheet; the first stage The parabolic holes on the energy-dissipating steel sheets are larger than the parabolic holes on the second-stage energy-dissipating steel sheets.

In the utility model, the size of the second-stage energy-dissipating steel sheets located on both sides is smaller than that of the first-stage energy-dissipating steel sheets in the middle, and the parabolic openings on the second-stage energy-dissipating steel sheets are correspondingly smaller than those located on the first-stage energy-dissipating steel sheets. The parabolic opening on the steel sheet, in terms of material selection, the yield point of the energy-dissipating steel sheet in the first stage is lower than the yield point of the energy-dissipating steel sheet in the second stage. The above settings cause the two energy-dissipating steel sheets to have different initial lateral stiffness. Thereby having different yield displacements and yield loads, so that staged energy consumption can be realized. Under the action of a small earthquake, the first-stage energy-dissipating steel sheet in the middle first yields plastically and consumes energy. Several parabolic holes are set on the sheet. According to the paper "Experimental Research on Parabolic Shape Mild Steel Damper" published by Xu Yanhong, Li Aiqun, and Huang Zhen in the "Journal of Building Structures" in 2011, the parabolic holes are conducive to the plastic deformation of energy-dissipating steel sheets. Uniform development and distribution, so it has good hysteresis performance and fatigue resistance.

Preferably, in the present utility model, the material of the energy-dissipating steel sheets in the first stage is steel with low yield point; the material of the energy-dissipating steel sheets in the second stage is ordinary carbon steel. Low-yield-point steel is a general term for steels with a low yield point, and generally has excellent deep drawing properties and deep-drawing properties. Compared with carbon steel, low-yield point steel has a lower yield point.

When the utility model selects the energy-dissipating steel sheet, it is necessary to ensure an appropriate amount of yield displacement of the first-stage energy-dissipating steel sheet. If the yield displacement is too small, it will lead to frequent replacement of the first-stage energy-consuming steel sheet. If it is too large, the yield displacements of the energy-dissipating steel sheets in the two stages are not obvious, and the purpose of energy consumption in stages of the device cannot be realized. Here, the yield displacement is mainly related to the size of the energy-dissipating steel plate, the size of the parabolic opening, and the material of the energy-dissipating steel sheet. Specifically, the combination of energy-dissipating steel sheets can be selected through finite element analysis or experimental research.

Preferably, in the present utility model, the energy-dissipating steel sheet is connected to the top plate and the bottom plate by welding. Ensure the reliable connection of the energy-dissipating steel sheets with the top and bottom plates.

Furthermore, in the present utility model, holes in the form of parabolas are set at intervals on each energy-dissipating steel sheet, and rounded corners are set at the positions where two parabolas of the same group meet. The parabola-shaped holes arranged at even intervals make the energy-dissipating steel sheet deform evenly after being stressed, and the rounded corners can prevent stress concentration.

Furthermore, in the present utility model, the left and right edges of the energy-dissipating steel sheet are set in a parabolic form with openings facing away from itself. Corresponding to the parabola-shaped holes, the energy-dissipating steel sheet is arranged at intervals between the parabolic-shaped holes and the solid part, which is conducive to the uniform development of plastic deformation.

Furthermore, in the present utility model, bolt holes are reserved on the top plate and the bottom plate, and are connected to the structural main body through high-strength bolts or shear-resistant connectors. Ensure that the device is reliably connected with the main body of the structure, and play a shock-absorbing role under horizontal action.

Beneficial effect:

The utility model provides a novel low-yield point steel staged energy consumer with simple design and manufacture, convenient installation and replacement, stable hysteresis performance, relatively low cost and energy consumption in stages;

The energy dissipator uses two kinds of energy dissipating steel sheets with different yield displacements and yield loads to realize energy dissipation in stages, and the parabolic opening is conducive to the uniform development and distribution of its strain, so that it has good hysteresis performance and fatigue properties;

This energy dissipator is installed in the building structure, which can dissipate a large amount of energy under small and large earthquakes, and has a considerable shock absorption effect.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the plane layout of the energy-dissipating steel sheet on the bottom plate;

Fig. 3 is the schematic diagram of the energy consumption steel sheet of the first stage;

Fig. 4 is the schematic diagram of the energy-dissipating steel sheet in the second stage;

Fig. 5 is the A direction view of Fig. 1;

Fig. 6 is the B direction view of Fig. 1;

Figure 7 is a schematic diagram of the connection between the utility model device and the steel frame;

Fig. 8 is a schematic diagram of the connection between the utility model device and the concrete frame;

Fig. 9 is a schematic diagram of the hysteresis curve of the physical model test of the device of the present invention.

Detailed ways

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

According to the introduction of the utility model, a small-sized energy dissipator is made, as shown in Figures 1 to 6, comprising a parallel and opposite top plate 5 and a bottom plate 6, an energy-dissipating steel sheet is arranged in the middle of the top plate 5 and the bottom plate 6, and the energy-consuming The energy-dissipating steel sheets connect the top plate 5 and the bottom plate 6; the energy-dissipating steel sheets include a first-stage energy-dissipating steel sheet 1 and two second-stage energy-dissipating steel sheets 2 arranged parallel to each other, and the two second-stage energy-dissipating steel sheets 2 The energy-dissipating steel sheet 2 is set on both sides with the first-stage energy-dissipating steel sheet 1 as the centerline. The dimensions are 400mm high, 263.4mm wide, and 24mm thick; in terms of material selection, the yield point of the energy-dissipating steel sheet 1 in the first stage is lower than that of the energy-dissipating steel sheet 2 in the second stage, and the energy-dissipating steel sheet Sheet 1 is made of Q160 material in low yield point steel, and the material of energy-dissipating steel sheet 1 in the second stage is Q235 in ordinary carbon steel; each energy-dissipating steel sheet is provided with a parabolic hole with the same opening size and A group of parabolas with opposite openings form a parabolic hole. Correspondingly, the left and right edges of the energy-dissipating steel sheet are also set in the form of a parabola with the opening facing away from itself; the parabola extends to a distance of At the position of 20 mm from the upper and lower edges of the energy-dissipating steel sheet, the symmetry axis of the parabola is parallel to the top plate 5 and located in the middle of the energy-dissipating steel sheet; Hole 3, the equation of the parabola on the large hole 3 is As shown in Figure 4, the parabolic hole on the energy-dissipating steel sheet 2 in the second stage is the small hole 4, and the equation of the parabola on the small hole 4 is Here the x-axis is perpendicular to the symmetry axis of the parabola, the origin of the x-axis is the point where the x-axis intersects the symmetry axis of the parabola, and the y-axis coincides with the symmetry axis of the parabola. A hole in a parabolic form on the second-stage energy-dissipating steel sheet 2.

Bolt holes 7 are reserved on the top plate 5 and the bottom plate 6, as shown in Figure 7, which is a schematic diagram of connecting the device with the steel beam 11 and steel support 12 in the main body of the structure through high-strength bolts 8; as shown in Figure 8, for this The device is connected to the upper concrete beam 10 in the main body of the structure through shear bolts 9, and is connected to the lower steel support 12 through high-strength bolts 8 at the same time.

In actual manufacturing, the energy-dissipating steel sheet is first processed according to the design parameters (including the height, width, and thickness of the energy-dissipating steel sheet and the width, width, and thickness of the top and bottom plates) and welded to the top and bottom plates, and according to the connection form in the Bolt holes are preset on the top and bottom plates, and the unit is then mounted in place.

The low-cycle repeated loading test was carried out on the physical model of the above-mentioned energy dissipator, and the hysteresis curve shown in Figure 9 was obtained. In Fig. 9, the horizontal axis is the loading displacement, and the vertical axis is the load magnitude. From the hysteresis curve, it can be seen that the hysteresis curve of the device is full and the energy dissipation performance is good.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (6)

1. an energy consumer stage by stage, it is characterized in that: comprise parallel relative top board (5) and base plate (6), in the middle of described top board (5) and base plate (6), be provided with power consumption steel disc, described power consumption steel disc connects top board (5) and base plate (6); Described power consumption steel disc comprises a first stage power consumption steel disc (1) and two the second stage power consumption steel discs (2) that are arranged in parallel, described two second stage power consumption steel discs (2) be take first stage power consumption steel disc (1) and are arranged on its both sides for center line, and the width of described first stage power consumption steel disc (1) is greater than the consume energy width of steel disc (2) of second stage; The yield point of the material of described first stage power consumption steel disc (1) is lower than the consume energy yield point of material of steel disc (2) of second stage; Described power consumption steel disc is provided with the hole of parabolic, and openings of sizes one group of parabola identical and that opening is relative between two forms the hole of a parabolic, and parabolical axis of symmetry is parallel to top board (5) and is positioned at the centre position of power consumption steel disc; The hole of the parabolic on first stage power consumption steel disc (1) is greater than the hole of the parabolic on second stage power consumption steel disc (2).

2. a kind of energy consumer stage by stage according to claim 1, is characterized in that: the material of first stage power consumption steel disc (1) is Low Yield Point Steel; The material of second stage power consumption steel disc (2) is common straightcarbon steel.

3. a kind of energy consumer stage by stage according to claim 1, is characterized in that: described power consumption steel disc and top board (5) and base plate (6) are all by being welded to connect.

4. a kind of energy consumer stage by stage according to claim 1, is characterized in that: on each power consumption steel disc, interval arranges the hole of parabolic, and the position of two parabola docking of same group arranges fillet.

5. according to a kind of energy consumer stage by stage described in any one in claim 1 to 4, it is characterized in that: the left and right edges of power consumption steel disc is all arranged to the opening parabolic of self dorsad.

6. according to a kind of energy consumer stage by stage described in any one in claim 1 to 4, it is characterized in that: at top board (5) and the upper prepared screw-bolt hole (7) of base plate (6), by high-strength bolt (8) or shear connector (9), be connected with main structure body.