CN103255704A - Steel damper anti-collision and anti-girder-dropping device - Google Patents

Abstract

The invention discloses an inventive steel damping anti-collision and anti-falling beam device, which comprises a cylinder and a left cover plate and a right cover plate fixedly arranged at both ends of the cylinder; a damping system is arranged in the cylinder, and one end of the damping system is fixedly connected to the On the right cover, the other end is fixedly connected to the sliding link. The free end of the sliding link passes through the left cover and extends to the outside of the cylinder. The outer limit baffle and the inner stop are set on the sliding link on both sides of the left cover. A limit baffle; a fixed connecting rod is fixedly arranged on the outside of the right cover. Due to the use of dampers for energy absorption, the overall stability of the bridge is greatly improved, the destructiveness of earthquakes is effectively reduced, and the effect of anti-collision and anti-fall is very ideal. Moreover, the structure is simple, the manufacture is easy, and there are fewer "nodes" between adjacent parts, which is beneficial to further improving the overall strength of the anti-collision and anti-fall device.

Description

Steel damping anti-collision anti-drop beam device

technical field

The invention relates to a bridge anti-seismic device, in particular to a device using damping elements to prevent the bridge from colliding or falling off.

Background technique

It can be seen from the previous earthquake damages that the most frequent damage forms of bridge structures are falling beam damage and collision damage. Falling beam damage refers to the separation of the upper structure of the bridge from the supporting lower structure, that is, the main girder is separated from the pier or abutment, causing the main girder to hang, break, or fall. Collision damage refers to the phenomenon that the upper structure of the bridge between adjacent links, that is, the gap between the main girders is completely compressed, and collides with each other, causing the ends of the main girders to crack. The reason for the falling beam failure is that the supporting length between the superstructure and the substructure of the bridge is too small to cope with the excessive seismic displacement of the superstructure. However, if the support length is set according to the seismic analysis results, the size of the substructure will often be too large and the economy will be poor. The reason for the collision damage lies in the asynchrony of the movement of the bridge superstructure between adjacent links. The asynchrony of motion is almost inevitable, because there will always be differences in the dynamic characteristics of two adjacent bridges, and the motion patterns under the action of earthquakes are also different. In the field of anti-seismic bridges, there are many studies on anti-fall beam devices, but most of them are limited to rigid components, such as steel strand cables or steel chains. When the rigid components play a role, the force on the structure increases suddenly, which will cause local damage to the connection parts, and then cause the failure of the anti-fall beam device. The research on anti-collision devices is mostly limited to the collision between the main girder and the transverse limit stopper, and rarely involves the collision between adjacent main girders.

In view of the above deficiencies, the patent application number is 201210438108.X. The multi-stage anti-falling beam anti-collision device tries to solve the above technical problems. Its working principle is to slow down and limit the relative displacement of the bridge construction through the buffering effect of the spring, so as to overcome the rigid connection. The problem of localized damage to the connection part caused by the construction. However, through simulation experiments and results analysis, it is proved that the structure still has the following deficiencies: First, the spring is used to play the role of buffering and shock absorption during collision or stretching. Because it is elastic deformation rather than plastic deformation, its stability is poor. The effect of anti-collision and anti-drop is not ideal, and it is easy to cause secondary damage to the bridge. The reason is that the use of springs only changes the form of energy (the kinetic energy generated by the collision is converted into the elastic potential energy of the spring), but does not play the role of energy absorption, energy consumption or even The role of energy dissipation. Second, the multi-stage sliding limit system is adopted, the structure is complicated, and the manufacturing cost is relatively low. Third, when stretching, the spring deformation and steel strands are used to limit the position. When compressing, the energy is converted into the elastic potential energy of the spring only by the spring deformation, and there is no hysteretic energy consumption effect. Compared with the huge bridge structure, the movement energy is relatively large. The conversion energy is very limited.

Contents of the invention

In view of this, the object of the present invention is to provide a steel damping anti-collision and anti-fall beam device, which uses damping components to consume and absorb bridge impact energy, improves the anti-collision effect and stability, and avoids secondary damage.

The object of the present invention is achieved by the following technical means: a steel damping anti-collision and anti-drop beam device, including a cylinder and a left cover plate and a right cover plate fixedly arranged at both ends of the cylinder; a damping system is arranged in the cylinder, and the damping One end of the system is fixedly connected to the right cover, and the other end is fixedly connected to the sliding link. The free end of the sliding link passes through the left cover and extends out of the cylinder. The sliding link is located on both sides of the left cover. A limit baffle and an inner limit baffle; the outer side of the right cover is fixedly connected with a fixed link.

Further, the damping system is composed of a damper; the damper includes an outer ring, an inner ring and support ribs evenly arranged between the outer ring and the inner ring.

Further, the supporting ribs are arc-shaped with a radian of π/3-π.

Further, the radius R of the outer ring of the damper is 5-25cm, the radius r of the inner ring is 2-15cm; the radial thickness t of the outer ring and the inner ring are both 0.4-2cm; the thickness d of the damper is 2-2cm 30cm.

Further, the damping system is composed of a plurality of dampers connected in series, and the planes where two adjacent dampers are located are perpendicular to each other.

Further, the outer ring, the inner ring and the supporting ribs are all made of damping materials with a damping ratio of 0.03-0.05.

Further, the damping material is Q235 steel, chrome-molybdenum alloy steel or 2Cr13 stainless steel.

Further, two force-receiving surfaces are arranged symmetrically on the outer side of the outer ring.

Further, the free ends of the sliding link and the fixed link are connected with installation supports.

Beneficial effects of the present invention: the steel damping anti-collision and anti-drop beam device of the present invention includes a cylinder and a left cover plate and a right cover plate fixedly arranged at both ends of the cylinder; a damping system is arranged in the cylinder, and one end of the damping system is fixedly connected On the right cover, the other end is fixedly connected to the sliding link, the free end of the sliding link passes through the left cover and extends to the outside of the cylinder, and the sliding link is provided with outer limit baffles and An inner limit baffle; a fixed connecting rod is fixedly arranged on the outer side of the right cover. Compared with the existing anti-collision device adopting springs and other elastic falling, the beneficial effects are as follows:

First, the working principle of the present invention is: fix it between the two bridges by installing the support, when the relative displacement of the two bridges occurs, firstly, the force transmission acts on the damping system through the sliding link and the fixed link, and the damping The system plays a damping role by being compressed or stretched. While effectively limiting the continued occurrence of displacement, the damping system consumes and absorbs a large amount of energy, reducing or even eliminating the reaction force of the damping system on the bridge, so that the bridge is no longer under force and remains static, thus The overall stability of the bridge is greatly improved, the destructiveness of earthquakes is effectively reduced, and the effect of anti-collision and anti-fall is very ideal.

Second, the existing patent application number is 201210438108.X multi-stage anti-falling beam anti-collision device, when a small displacement occurs between the bridges, the springs and even the limit stops will not be effective, the bridge Displacement of a certain distance can occur between the bridges. When the spring and the limit stop really have an effect, a large displacement has actually occurred between the bridges, which seriously affects the anti-collision and anti-drop effect; and the anti-collision and anti-fall The falling device is firmly fixed between the two bridges by installing the support. When the relative displacement occurs between the bridges, it can immediately act in the opposite direction to limit the continued occurrence of bridge displacement. When the bridge is actually restricted After the displacement, the displacement of the bridge is greatly reduced compared with the former, and the anti-collision and anti-fall effect is very obvious.

Third, compared with the existing multi-stage anti-falling beam anti-collision device with patent application No. 201210438108.X, the structure is simple and easy to manufacture, and there are fewer "nodes" between adjacent parts, which is conducive to further improving the anti-collision The overall strength of the fall arrest device.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is A-A to sectional view among Fig. 1;

Fig. 3 is a structural schematic diagram of the damper in the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings, as shown in the figure: the steel damping anti-collision and anti-drop beam device of the present embodiment includes a cylinder 6 and a left cover plate 3 and a right cover plate 8 fixedly arranged at both ends of the cylinder The cylinder is provided with a damping system 7, one end of the damping system is fixedly connected to the right cover plate 8, the other end is fixedly connected to the sliding link 4, the free end of the sliding link passes through the left cover plate 3 and extends to the outside of the cylinder, An outer limit baffle 2 and an inner limit baffle 5 are arranged on both sides of the left cover 3 on the sliding link 4 ; the outer side of the right cover is fixedly connected with a fixed link 9 . Wherein, the damping system is composed of a damper; the damper includes an outer ring 7a, an inner ring 7d and a support rib 7b evenly arranged between the outer ring and the inner ring, and the outer ring, the inner ring and the support rib are all composed of Made of damping material; through theoretical analysis combined with repeated tests, the present invention preferably adopts a damping material with a damping ratio of 0.03-0.05, which can maximize the damping energy absorption effect; specifically, Q235 steel, chrome-molybdenum alloy steel or 2Cr13 stainless steel can be used , which can be purchased from the market.

As a further improvement of the above technical solution, the radius R of the outer ring 7a of the damper is 5-25cm, specifically R=8cm; the radius r of the inner ring 7d is 2-15cm; specifically r=7cm; the outer ring and the inner The radial thickness t of the ring is 0.4-2cm, specifically, t=1cm; the thickness d of the damper is 2-30cm; specifically, d=6cm. The supporting rib 7b is arc-shaped, and the radian rad is π/3-π, specifically rad=0.5π. Through model analysis and repeated experimental verification, parameters such as R, r, t, d and rad are optimized. The energy absorption effect is very ideal, and the comprehensive performance is superior. Appropriate selection of the installation quantity can be applied to various types of existing bridges.

As a further improvement of the above technical solution, the damping system is composed of a plurality of dampers connected in series, and the planes where two adjacent dampers are located are perpendicular to each other. The vertical arrangement is more conducive to the stability of the device under force, less prone to out-of-plane deformation, and more conducive to exerting the hysteretic energy dissipation effect of the steel damping element.

As a further improvement of the above technical solution, two force-receiving surfaces 7c are arranged symmetrically on the outer side of the outer ring 7a. The force-bearing surface is set so that when the damper is hit, it is surface force, not point force, and the force is balanced.

As a further improvement of the above technical solution, the free ends of the sliding link 4 and the fixed link 9 are both connected to the installation support 1 . Easy to fix, easy to install and easy to use.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be carried out Modifications or equivalent replacements without departing from the spirit and scope of the technical solution of the present invention shall be covered by the claims of the present invention.

Claims (9)

1. A steel damping anti-collision and anti-fall beam device, characterized in that: it includes a cylinder (6) and a left cover (3) and a right cover (8) fixedly arranged at both ends of the cylinder; System (7), one end of the damping system is fixedly connected to the right cover (8), the other end is fixedly connected to the sliding link (4), the free end of the sliding link passes through the left cover (3) and extends to the cylinder In addition, the sliding link (4) is located on both sides of the left cover (3) to set the outer limit baffle (2) and the inner limit baffle (5); the outer side of the right cover is fixedly connected with the fixed link ( 9). 2. The steel damping anti-collision and anti-fall beam device according to claim 1, characterized in that: the damping system is composed of a damper; the damper includes an outer ring (7a), an inner ring (7d) and uniformly arranged Support ribs (7b) between the outer and inner rings. 3. The steel damping anti-collision and anti-falling beam device according to claim 2, characterized in that: the support rib (7b) is arc-shaped, and the radian is π/3-π. 4. The steel damping anti-collision and anti-fall beam device according to claim 3, characterized in that: the radius R of the outer ring (7a) of the damper is 5-25cm, and the radius r of the inner ring (7d) is 2- 15cm; the radial thickness t of the outer ring and inner ring is 0.4-2cm; the thickness d of the damper is 2-30cm. 5. The steel damping anti-collision and anti-fall beam device according to claim 2, characterized in that: the damping system is composed of a plurality of dampers connected in series, and the planes where two adjacent dampers are located are perpendicular to each other. 6. The steel damping anti-collision and anti-fall beam device according to claim 2, characterized in that: the outer ring, the inner ring and the supporting ribs are all made of damping materials with a damping ratio of 0.03-0.05. 7. The steel damping anti-collision and anti-fall beam device according to claim 6, characterized in that: the damping material is Q235 steel, chrome-molybdenum alloy steel or 2Cr13 stainless steel. 8. The steel damping anti-collision and anti-fall beam device according to claim 2, characterized in that: two force-bearing surfaces (7c) are arranged symmetrically on the outer side of the outer ring (7a). 9. The steel damping anti-collision and anti-fall beam device according to claim 1, characterized in that: the free ends of the sliding link (4) and the fixed link (9) are both connected with mounting supports (1).

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