CN203487456U

CN203487456U - Rotary-type MTMD system used for auxiliary vibration control of arc-shaped steel bridge tower

Info

Publication number: CN203487456U
Application number: CN201320437486.6U
Authority: CN
Inventors: 李宇; 王新; 王森; 车艳阳; 胡文哲; 李加武; 白桦
Original assignee: Changan University
Current assignee: Changan University
Priority date: 2013-07-22
Filing date: 2013-07-22
Publication date: 2014-03-19
Anticipated expiration: 2023-07-22

Abstract

The utility model discloses a rotary-type MTMD (Multiple Tuned Mass Damper) system used for auxiliary vibration control of an arc-shaped steel bridge tower. The rotary-type MTMD system includes a plurality of TMD (Tuned Mass Damper) modules. Each TMD module is provided with a steel bottom board equipped with a mass block whose left side and right side are both connected with vertical steel boards through springs, the two vertical steel boards and two dampers arranged on the front side and the rear side of the mass block in a balanced manner. One end of each damper is connected with the vertical steel boards while the other end of each damper is connected with a slot in the corresponding mass block fixedly. Two ends of each two vertical steel boards are provided with a roller capable of rotating 360 degrees each. Side faces of the steel boards are connected with angle iron connection pieces. The rotary-type MTMD system used for auxiliary vibration control of the arc-shaped steel bridge tower is suitable for vibration control of the arc-shaped steel bridge tower under an effect of strong breezes, controls the arc-shaped steel bridge tower with different bridge tower structure systems in a construction phase and a bridge forming phase through rotation and further reduces wind-induced vibration of the steel arc tower during construction and in a tower forming state. Therefore, construction quality of the steel arc tower is guaranteed.

Description

A kind of rotary type MTMD system of auxiliary arch steel bridge tower damping

Technical field

The utility model belongs to bridge design field, relates to a kind of auxiliary arch head tower damping system, is specifically related to a kind of rotary type MTMD system of auxiliary arch steel bridge tower damping.

Background technology

Arch head tower is the high-rise structures that a kind of structure is more novel, but the bridge tower wind vibration response of the type is obvious, and in order to meet the deformation requirements of steel arch tower, General Requirements carries out vibration isolation to structure.Tuned mass damper (Tuned Mass Damper is called for short TMD) is effective to the control of wind induced structural vibration response, but, the control effect of single TMD is comparatively responsive to its frequency, when frequency is slightly during off-design value, controlling effect just can greatly decline, and adopt a plurality of TMD (Multiple Tuned Mass Dampers is called for short MTMD) to make its frequency distribution within the specific limits, can improve the robustness of control system, to reach good effectiveness in vibration suppression.But, the current MTMD system that is not still applicable to Arch Steel Bridge tower, and existing MTMD system can not be controlled construction simultaneously and become the bridge tower in bridge stage to vibrate.

Utility model content

The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, and the utility model provides a kind of rotary type MTMD system of auxiliary arch steel bridge tower damping, and this system can increase the vibration frequency range of Arch Steel Bridge, specifically has robustness simultaneously.

For achieving the above object, the rotary type MTMD system of auxiliary arch steel bridge tower damping described in the utility model comprises several TMD modules, described TMD module is provided with steel plate base plate, described steel plate base plate is provided with mass, the steel plate of two settings and two dampers, the described mass left and right sides is connected with the steel plate of described setting, described two dampers are arranged at the both sides, front and back of described mass, one end of described damper is connected with the steel plate of described setting, the other end is fixedly connected with the draw-in groove on described mass, the two ends of the steel plate of described setting are provided with runner that can 360 ° of rotations, the side of the steel plate of described setting is connected with angle iron connecting piece.

The left and right sides of described mass is all connected with the steel plate of described setting by spring.

The both sides, front and back that are arranged at described mass of described two damper equilibriums.

Described angle iron connecting piece is provided with several high-strength bolts.

The upper end of described steel plate base plate and lower end are equipped with several prepared screw-bolt holes.

Two rolling bearings are installed below described mass.

Described mass is fixedly connected with by packing ring and bolt with described spring.

The cross section of described mass is square, and the described foursquare length of side is 1800mm.

Described mass is concrete block or lead; When described mass is concrete block, described draw-in groove is of a size of 1 * 1m; When described mass is lead, described draw-in groove is of a size of 0.6 * 0.6m.

Compared with prior art, the utility model advantage is:

The utility model is provided with several TMD modules, thereby effectively increase the vibration frequency range of control structure, simultaneously under the condition of any mass ratio, effectiveness in vibration suppression of the present utility model is all than the good damping result of single TMD system, with respect to single TMD module, the utility model can be decomposed into the mass of single massiveness a plurality of small and light masses, being convenient to engineering makes, install and use, be easier to promote in engineering construction, the utility model vibration isolation under high wind effect applicable to Arch Steel Bridge tower simultaneously, by the rotation of self, control construction and the Arch Steel Bridge tower that becomes the different bridge tower structural systems in bridge stage, and then alleviate construction and the wind-induced vibration that becomes tower-like state steel arch tower, to reach, ensure steel arch tower construction quality, the object of construction equipment and personal security.

Accompanying drawing explanation

Fig. 1 be the different Construction States of bridge tower on structure before the impact of 6 order frequencies;

Fig. 2 (a) is the front view of bridge tower before closing up;

Fig. 2 (b) is the left view of bridge tower before closing up;

Fig. 2 (c) is the top view of bridge tower before closing up;

Fig. 2 (d) is the stereogram of bridge tower before closing up;

Fig. 3 (a) is the front view of bridge tower after closing up;

Fig. 3 (b) is the left view of bridge tower after closing up;

Fig. 3 (c) is the top view of bridge tower before closing up;

Fig. 3 (d) is the stereogram of bridge tower before closing up;

Fig. 4 (a) is for adding the structural representation of steel arch tower of the Construction State of MTMD;

Fig. 4 (b) is for adding the structural representation of steel arch tower of the tower-like state of one-tenth of MTMD;

Fig. 5 is the structural representation of TMD module in the utility model;

Fig. 6 (a) is installed on the drawing of site of the arch steel arch tower of Construction State for the utility model;

Fig. 6 (b) is installed on into the drawing of site of the firm Tower Bridge of arch of bridge state for the utility model.

Wherein, 1 is that mass, 2 is that spring, 3 is that runner, 4 is that damper, 5 is that prepared screw-bolt hole, 6 is that rolling bearing, 7 is that angle iron connecting piece, 8 is that high-strength bolt, 9 is the steel plates of setting.

The specific embodiment

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

Referring to Fig. 5, the utility model comprises several TMD modules, described TMD module is provided with steel plate base plate, described steel plate base plate is provided with mass 1, the steel plate 9 of two settings and two dampers 4, the cross section of described mass 1 is square, the described foursquare length of side is 1800mm, the soffit of described mass 1 is provided with two rolling bearings 6, described mass 1 left and right sides is all connected with the steel plate 9 of described setting by spring 2, described mass 1 is fixedly connected with by packing ring and bolt with described spring 2, the both sides, front and back that are arranged on described mass 1 of described two damper 4 equilibriums, one end of described damper 4 is connected with the steel plate of described setting 9, the other end is fixedly connected with the draw-in groove of mass 1, the two ends of the steel plate 9 of described two settings are equipped with to runner 3 that can 360 ° of rotations, the side of the steel plate 9 of described setting is connected with angle iron connecting piece 7, described angle iron connecting piece 7 is provided with several high-strength bolts 8, the upper end of described steel plate base plate and lower end are equipped with several prepared screw-bolt holes 5.Described mass 1 can be concrete block or lead in addition, and when described mass 1 is concrete block, described draw-in groove is of a size of 1 * 1m; When described mass 1 is lead, described draw-in groove is of a size of 0.6 * 0.6m.

Concrete installation process of the present utility model and apply as follows:

(1) with reference to figure 1, Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), Fig. 2 (d), 3 (a), Fig. 3 (b), Fig. 3 (c) and Fig. 3 (d), calculate the dynamic characteristics that arch head tower is constructed and become tower-like state, therefrom known when steel arch tower becomes into tower-like state from Construction State, its base first order mode also changes out-of-plane vibration into by plane vibration, in the process of this system conversion, easily there is wind-induced vibration in steel arch tower;

(2) with reference to figure 4 (a) and Fig. 4 (b), calculated mass is than quantity m, the damping ratio ξ of μ, TMD module _twith the impact of bandwidth β on the utility model effectiveness in vibration suppression, and then construction and the optimal value of the parameter that becomes the MTMD system of tower-like state have been advised;

(3) in arch head tower Platform Vibration direction, horizontal steel plate is set as base, and sets up the steel plate 9 of two settings thereon;

(4) by one end of spring 2 by packing ring and being bolted on mass 1, the other end is fixed on the steel plate 9 of setting;

(5) damper 4 is balancedly arranged in to the both sides of mass 1, its one end can be connected on the steel plate 9 of setting by bolt and clamping plate, and the other end is fixed on the draw-in groove of mass 1;

(6) mass 1 is placed in the draw-in groove of center position, if mass 1 is concrete block, draw-in groove is designed and sized to 1 * 1m, as is lead, and draw-in groove size is 0.6 * 0.6m;

(7) below mass 1, roller bearing is installed, to reduce the friction between itself and steel plate base;

(8) two both sides of erectting steel plates, arrange can 360 ° of rotations runner 3, after in plane vibration when Construction State is controlled, dismountable high-strength bolt 8, adopt again boom hoisting that TMD module is rotated to 90 ° to control the out-of-plane vibration after steel arch tower closes up, another direction is prepared screw-bolt hole 5, so that TMD module is fixing.

(9) installation site of the present utility model is as shown in Fig. 6 (a) and Fig. 6 (b), and wherein the TMD module of mark is according to placing to two modes side by side along suitable bridge.For the steel arch tower of Construction State, need set up again a line support at existing standoff top, and place 6 TMD modules thereon, remaining TMD module is placed on now standoff top; Each TMD module after head tower closes up is placed on the inside of steel arch circle.

Claims

1. the rotary type MTMD system of an auxiliary arch steel bridge tower damping, it is characterized in that, comprise several TMD modules, described TMD module is provided with steel plate base plate, described steel plate base plate is provided with mass (1), the steel plate of two settings (9) and two dampers (4), described mass (1) left and right sides is connected with the steel plate (9) of described setting, described two dampers (4) are arranged at the both sides, front and back of described mass (1), one end of described damper (4) is connected with the steel plate (9) of described setting, the other end is fixedly connected with the draw-in groove on described mass (1), the two ends of the steel plate of described setting (9) are provided with runner (3) that can 360 ° of rotations, the side of the steel plate of described setting (9) is connected with angle iron connecting piece (7).

2. the rotary type MTMD system of auxiliary arch steel bridge tower damping according to claim 1, is characterized in that, the left and right sides of described mass (1) is all connected with the steel plate (9) of described setting by spring (2).

3. the rotary type MTMD system of auxiliary arch steel bridge tower damping according to claim 1, is characterized in that, the both sides, front and back that are arranged at described mass (1) that described two dampers (4) are balanced.

4. the rotary type MTMD system of auxiliary arch steel bridge tower damping according to claim 1, is characterized in that, described angle iron connecting piece (7) is provided with several high-strength bolts (8).

5. the rotary type MTMD system of auxiliary arch steel bridge tower damping according to claim 1, is characterized in that, the upper end of described steel plate base plate and lower end are equipped with several prepared screw-bolt holes (5).

6. the rotary type MTMD system of auxiliary arch steel bridge tower damping according to claim 1, is characterized in that, described mass (1) two rolling bearings (6) are installed below.

7. the rotary type MTMD system of auxiliary arch steel bridge tower damping according to claim 2, is characterized in that, described mass (1) is fixedly connected with by packing ring and bolt with described spring (2).

8. the rotary type MTMD system of auxiliary arch steel bridge tower damping according to claim 1, is characterized in that, the cross section of described mass (1) is square, and the described foursquare length of side is 1800mm.

9. the rotary type MTMD system of auxiliary arch steel bridge tower damping according to claim 1, is characterized in that, described mass (1) is concrete block or lead;

When described mass (1) is concrete block, described draw-in groove is of a size of 1 * 1m;

When described mass (1) is lead, described draw-in groove is of a size of 0.6 * 0.6m.