CN204252311U - Vertically punch mild steel damper - Google Patents

Abstract

The utility model relates to a soft steel damper with vertical openings, which mainly includes nuts, screws, steel plates and holes on the steel plates, etc. There are three rows of holes on the plane of the steel plates, and connecting rods connect multiple steel plates through the upper and lower rows of holes. , combined into a damper, there will be a set of nuts on both sides of each steel plate to fix the steel plate on the screw rod, the main shape of the three holes in the middle is a vertical fish belly shape, and the ends adopt circular arc transitions, which mainly cause stress redistribution. Achieve multiple yields. The earthquake action is first transmitted to the upper and lower sets of screws. When the upper and lower sets of screws produce relative horizontal displacements, due to the tight connection of the construction, the fixed nut transmits the force to the steel plate to drive the steel plate to yield and deform to achieve the purpose of shock absorption. In the realization of multi-point yield The rear steel plate yields and breaks, absorbing shock and consuming energy.

Description

Mild steel damper with vertical opening

technical field

The utility model relates to a mild steel damper with a vertical hole.

Background technique

In recent years, a large number of scholars at home and abroad have done a lot of research work on the anti-seismic, vibration reduction and vibration of engineering structures. The traditional anti-seismic method is to achieve the anti-seismic fortification standard through the storage and energy consumption of its own structure: small earthquakes are not bad, and moderate earthquakes can Xiu, it won't fall down after a big earthquake. This anti-seismic method has the disadvantage of lack of adjustment ability. The structural vibration technology provides a reasonable and effective way for structures to resist earthquakes. Among them, energy dissipation and shock absorption, as a passive control measure, is to direct the seismic energy input into the structure to specially designed mechanisms and components for absorption and dissipation, so as to protect the safety of the main structure.

Mild steel damping uses the plastic hysteretic deformation dissipation capacity of different forms of metals. Since metals have good hysteretic characteristics after entering the plastic state and absorb a large amount of energy during elastic-plastic hysteretic deformation, they are used to make different Types and constructions of energy-dissipating dampers.

Advantages of mild steel damper: easy processing, simple structure, low cost, clear mechanical model, steel plate still has stable hysteresis characteristics under repeated cyclic load, low maintenance cost, and easy to replace. The yielding of the damper steel plate does not affect the load-carrying capacity of the structure itself. Used in civil structures with a high level of seismic resistance, the damper can well reduce the impact of earthquakes on the structure.

The disadvantages of the mild steel damper are: the initial stiffness is small and the bearing capacity is low. If the initial stiffness is increased, the number of steel plates for the damper needs to be increased, and the force mode in the plane of the steel plate can be greatly improved Increase its initial stiffness and yield strength.

Although the geometric shapes and structural forms of the mild steel dampers are different, they essentially absorb energy through the yield of the mild steel material, that is, the plastic deformation. The damping force of the mild steel damper is mainly determined by the plastic strain of the mild steel, namely The plastic displacement is determined, so the damping capacity of the damper mainly depends on the deformation capacity, that is, whether the hysteresis curve is full. It can be seen that the hysteretic model of force and displacement has become a key factor in the study of mild steel dampers.

Utility model content

The purpose of this utility model is to propose a new type of mild steel damper with vertical openings. It mainly utilizes the good initial stiffness and plasticity of the vertical stripe mild steel damper to superimpose 10 pieces of mild steel damper in one piece, and through the screw screw The cap is fixed as a whole, and the gap between each two dampers can ensure that each steel plate can deform freely and achieve yield, thereby dissipating energy. When the earthquake force comes, when the upper and lower groups of screw rods at the end produce relative displacement in a certain direction, the web panel perpendicular to the direction can undergo bending yield to consume energy and absorb shock. When a certain steel plate is damaged in advance, since each piece of mild steel damper is tightly connected at the end, it does not affect the performance or damage of other mild steel damper pieces, and can continue to carry the load. A more efficient shock-absorbing mild steel damper is thereby provided.

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

The damper of the mild steel damper with vertical openings proposed by the utility model is composed of several mild steel damping monolithic steel plates 4 and screw rods 6 with the same structure, wherein: each mild steel damping monolithic steel plate 4 is from top to bottom The bottom is composed of the upper flange, the web and the lower flange. Each mild steel damping single plate 4 has three rows of holes from top to bottom. The first row of upper end connecting hole groups 1 is located at the upper flange. The second row of fish-belly hole group 2 is located at the web, and the third row of lower-end connecting hole group 3 is located at the lower wing plate; the upper-end connecting hole group 1 and the lower-end connecting hole group 3 adopt round holes of the same diameter, and the fish The abdominal hole group 2 is vertically arranged, and the threaded screw rod 6 passes through the round hole and the nut 5 of the corresponding upper end connecting the hole group 1 on the mild steel damper monolithic steel plate 4 arranged alternately, with thread The screw rods 6 pass through the round holes and the nuts 5 of the corresponding lower ends connecting the hole group 2 on the alternately arranged mild steel damper single plate plates 4 in sequence, and the adjacent mild steel damper single plate plates are fixed by the nuts 5 , the gap between two adjacent mild steel damper monolithic steel plates 4 is the thickness of the nut 5 .

In the present utility model, the upper connecting hole group 1 adopts 3 round holes, and the lower connecting hole group 2 adopts 3 round holes.

In the utility model, the mild steel damping single-piece steel plate 4 is ordinary carbon steel, the width of the web is 60-80% of the height, and the upper and lower wing plates of the mild steel damping single-piece steel plate 4 extend laterally 20% of the width of the web, and 20% of the height of the web.

In the utility model, the fish-belly hole group 2 adopts 3 vertical stripe holes, and the 3 vertical stripe holes account for 50-40% of the web area, and the upper and lower ends of each vertical stripe hole adopt arc smooth transition,

In the present utility model, the round holes on the upper end connection hole group 1 and the lower end connection hole group 3 account for 5% of the area of the single mild steel damping single steel plate 4.

In the utility model, the screw rod 6 and the nut 5 are low-alloy steel materials, the nut 5 is a regular hexagon, and the outer diameter of the screw rod 6 is the same as that of the upper end connection hole group 1 and the lower end connection hole group 2.

In the utility model, three vertical fish-belly holes are arranged neatly, the middle hole is centered, and the holes on both sides are arranged symmetrically to avoid mass eccentricity. The purpose of the middle opening is mainly to share the load at the end. Since the end has defects due to processing technology and other issues, the stress redistribution is caused by the middle opening to relieve the excessive concentration of stress at the end, realize multi-point yielding, and avoid partial yielding. Premature failure of the steel plate is the energy consumption for the plastic properties of the entire steel plate to reach the maximum. In order to avoid stress concentration at places with large shape changes, arc transitions are used at corners. The advantage of using a strip damper is that it has good plasticity and high initial stiffness. The connection problem is solved by the combination of the screw and the nut, and the influence of the welding method on the properties of the steel is avoided.

The effect of the utility model is: when the earthquake force comes, when the upper and lower groups of screw rods at the end produce a relative displacement in a certain direction, the web panel perpendicular to the direction can bend and yield to consume energy and absorb shock. When a certain steel plate is damaged in advance, since each piece of mild steel damper is tightly connected at the end, it does not affect the performance or damage of other mild steel damper pieces, and can continue to carry the load. A more efficient shock-absorbing mild steel damper is thereby provided.

Description of drawings

 Figure 1 is a plan view of a single steel plate of the damper.

Figure 2 is the plan view after the damper is connected.

Figure 3 is a side view of the damper after it is connected.

Labels in the figure: 1-upper end connection hole group, 2-fish-belly hole group, 3-lower end connection hole group, 4-mild steel damping single-piece steel plate, 5-nut, 6-screw.

Detailed ways

The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings.

Embodiment 1: As shown in the figure, the damper is composed of 10 mild steel damping monolithic (7) steel plates with the same structure, 66 screw rods 6 and 6 threaded screw rods, wherein: each mild steel damping monolithic steel plate 4 From top to bottom, it is composed of upper flange, web and lower flange. Each mild steel damping single plate 4 has three rows of holes from top to bottom. There are 3 round holes located at the upper wing, the second row of fish-belly hole group 2 is located at the web, and there are 3 vertically arranged holes, and the third row of lower connecting hole group 3 is located at the lower wing , with 3 round holes; the upper end connection hole group 1 and the lower end connection hole group 3 adopt round holes of the same diameter, the fish-belly hole group 2 is arranged vertically, and three screw rods 6 with threads pass through them in turn The corresponding upper ends of the 10 mild steel damper monolithic steel plates 4 that are arranged alternately connect the round holes and the nuts 5 of the hole group, and the three screw rods 6 with threads pass through the 10 mild steel damper monoliths that are alternately arranged. The corresponding lower ends of the steel plates 4 are connected to the round holes of the hole group 2 and the nuts 5, and the gap between two adjacent mild steel damper single steel plates 4 is the thickness of the nuts 5. First, fix a group of 6 nuts 5 on the bottoms of 6 screw rods ⑹ respectively, and then install a piece of mild steel damping single-piece steel plate 4 through the upper end connecting hole group 1 and the lower end connecting hole group 3, and then Install a group of 6 nuts 5 to fix the mild steel damping monolithic steel plate 4, and install these 10 according to the order of mild steel damping monolithic steel plate 4-nut 5-mild steel damping monolithic steel plate 4-nut 5... plate until the entire unit is installed.

The mild steel damping monolithic steel plate 4 is ordinary carbon steel material, and the nut 5 and screw rod 6 are low-alloy steel materials. Due to the excessive force at the end, in order to ensure that the nut 5 and the screw rod are damaged before the mild steel damping monolithic 7 is damaged 6 is not damaged, that is, it must be ensured that the strength and rigidity of the nut 5 and the screw rod 6 are greater than that of the mild steel damping single piece 7, so as to effectively transmit the effect to the mild steel damping single piece steel plate 4. By stacking 10 mild steel damper single-piece steel plates 4 and fixing them as a whole through the screw rod 6 and the nut 5, the gap between each two dampers can ensure that each steel plate can be freely deformed to achieve yield and thus reduce Shock energy.

Claims (6)

1. the mild steel damper that vertically punches, described damper is made up of the identical mild steel damping single steel plate (4) of some block structures and screw rod (6), it is characterized in that every sheet mild steel damping single steel plate (4) connects to form one by upper flange, web and lower wing plate from top to bottom, every sheet mild steel damping single steel plate (4) has three perform hole hole groups from top to bottom, the first row upper end connects hole group (1) and is positioned at upper flange place, second row fish belly nibs hole group (2) is positioned at web place, and the third line bottom connects hole group (3) and is positioned at lower wing plate place, upper end connects hole group (1) and is connected the circular hole that hole group (3) adopts same diameter with bottom, fish belly nibs hole group (2) is vertical layout, screwed screw rod (6) connects circular hole and the nut (5) of hole group (1) successively through the upper corresponding upper end of the mild steel damper single steel plate (4) alternately arranged, screwed screw rod (6) connects circular hole and the nut (5) of hole group (2) successively through the upper corresponding bottom of the mild steel damper single steel plate (4) alternately arranged, fixed by nut (5) between adjacent mild steel damper single steel plate, the gap of adjacent two panels mild steel damper single steel plate (4) is the thickness size of nut (5).

2. one according to claim 1 vertically punches mild steel damper, and it is characterized in that described upper end connects hole group (1) and adopts 3 circular holes, bottom connects hole group (2) and adopts 3 circular holes.

3. one according to claim 1 vertically punches mild steel damper, it is characterized in that (7) described mild steel damping single steel plate is normal carbon steel, web width is the 60-80% of height, mild steel damping single steel plate upper flange (7) and lower wing plate laterally respectively extend 20% of web width, are highly 20% of web height.

4. one according to claim 1 vertically punches mild steel damper, it is characterized in that fish belly nibs hole group (2) adopts 3 vertical striped holes, described 3 vertical striped holes account for the 50-40% of web area, and the upper/lower terminal of each vertical striped hole adopts circular arc to smoothly transit.

5. one according to claim 1 vertically punches mild steel damper, it is characterized in that upper end connects hole group (1) circular hole be connected with bottom in hole group (3) and accounts for 5% of monolithic mild steel damping single steel plate (4) area.

6. one according to claim 1 vertically punches mild steel damper, it is characterized in that screw rod (6) with nut (5) for low-alloy steel product, (5) nut is regular hexagon, and it is identical with the diameter that bottom connects hole group (2) that screw rod external diameter (6) and upper end connect hole group (1).