BENDING-TYPE FRICTION STEEL TRUSS COUPLING BEAM FOR QUICK RECOVERY AFTER EARTHQUAKE

Abstract

The disclosure provides a Bending-type Friction Steel Truss Coupling Beam, which can be rapidly repaired following an earthquake event. It comprises an upper chord, a lower chord, a diagonal web member, a web member, a T-shaped plate and a friction device. The friction device is located at both ends of the lower chord, where large deformation may occur. The friction device comprises a T-shaped friction main plate, a friction plate, a cover plate and a friction bolt. The disclosure uses a friction device to dissipate energy based on a common steel truss coupling beam. Different sliding loads can be designed according to the seismic precautionary intensity of different regions. The disclosure has the advantages of simple structure, immediate occupancy and low repair cost.

Claims

1. A bending-type friction steel truss coupling beam for quick recovery after earthquake, wherein the bending-type friction steel truss coupling beam comprises an upper chord, a lower chord, diagonal web member, web member, T-plate and a friction device; the web member is vertically fixed between the upper chord and the lower chord; two diagonal web member, symmetrically with the web member as an axis, are fixed between the upper chord and the lower chord, upper end of the diagonal web member is fixed on end of the upper chord, lower end of the diagonal web member is fixed near lower end of the web member; flanges of the two T-plates are fixed on upper surface at both ends of the upper chord, respectively; the friction device comprises a T-type friction sliding plate, a friction plate, a cover plate and a friction type high-strength bolt; at both ends of lower surface of the lower chord, the friction plate, T friction sliding plate, friction plate and cover plate are installed in order; flange of the T-type friction sliding plate is provided with a long slot hole to enable slipping; same circular bolt hole is processed on the friction plate, cover plate and lower chord, and the position of the circular bolt hole corresponds to the position of the long slot hole on the T-type friction sliding plate; the friction device is connected and fixed with the lower chord by the friction type high-strength bolt and the nut; the cover plate, there is a gap between the cover plate, the lower chord and the flange end of the T-type sliding plate.

2. The bending-type friction steel truss coupling beam for quick recovery after earthquake according to claim 1, wherein the circular bolt holes on the lower chord, friction plate and cover plate correspond to central position of the long slot hole on the T-type sliding plate, so as to ensure that the displacement of forward and reverse sliding of the T-type sliding plate is equal.

3. The bending-type friction steel truss coupling beam for quick recovery after earthquake according to claim 1, wherein the gap between the cover plate, the lower chord and the flange end of the T-type sliding plate is greater than the displacement when the T-type sliding plate slips.

4. The bending-type friction steel truss coupling beam for quick recovery after earthquake according to claim 1, wherein a disc spring is installed under the friction type high-strength bolt and nut to prevent the friction type high-strength bolt from loosening and deformation during the sliding process of T-type sliding plate.

5. The bending-type friction steel truss coupling beam for quick recovery after earthquake according to claim 3, wherein the disc spring is installed under the friction type high-strength bolt and nut to prevent the friction type high-strength bolt from loosening and deformation during the sliding process of T-type sliding plate.

6. The bending-type friction steel truss coupling beam for quick recovery after earthquake according to claim 1, wherein the T-shaped plate is welded or bolted with the upper chord; the diagonal web member is welded to the upper chord and the lower chord, and the web member is welded to the upper chord and the lower chord.

7. The bending-type friction steel truss coupling beam for quick recovery after earthquake according to claim 3, wherein the T-shaped plate and the upper chord are welded or bolted; the diagonal web and the upper chord and the lower chord are welded; the web and the upper chord and the lower chord are welded.

8. The bending-type friction steel truss coupling beam for quick recovery after earthquake according to claim 4, wherein the T-shaped plate is fixed with the upper chord by welding or bolt connection; the diagonal web is welded to the upper chord and the lower chord; the web is welded to the upper chord and the lower chord.

9. The bending-type friction steel truss coupling beam for quick recovery after earthquake according to claim 1, wherein the friction plate is made of brass or brake pad.

10. The bending-type friction steel truss coupling beam for quick recovery after earthquake according to claim 6, wherein the friction plate is made of brass or brake plate.

Description

DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a picture to show the structural of the present disclosure.

[0015] FIG. 2 is a picture to show the longitudinal sectional view of the friction device position in FIG. 1.

[0016] FIG. 3 is a picture to show the transversal view of the friction device position in FIG. 1.

[0017] FIG. 4 is a picture to show the hysteresis curve of the Bending-type friction steel truss coupling beam.

[0018] In the figures: 1 upper chord; 2 diagonal web member; 3 web member; 4 lower chord; 5 T-type sliding plate; 6 friction plate; 7 cover plate; 8 friction type high-strength bolt; 9 disc spring.

DETAILED DESCRIPTION

[0019] The specific embodiments of the present disclosure will be further described below in conjunction with the drawings and technical solutions.

[0020] A bending-type friction steel truss coupling beam for quick recovery after an earthquake is provided, which includes upper chord 1, lower chord 4, diagonal web member 2, web member 3, T-plate 10 and friction device.

[0021] As shown in FIG. 1, web member 3 is welded vertically between upper chord 1 and lower chord 4; Two diagonal web member 2 are welded between the upper chord 1 and the lower chord 4 with the web member 3 as axial symmetry, the upper end of the diagonal web member 2 is welded on the upper chord 1 end, the lower end of the diagonal web member 2 is welded near the lower end of the web member 3 position; The flanges of the two T-plates 10 are respectively welded to the upper surface at both ends of the upper chord 1. The friction device of the bending steel truss coupling beam is installed on both ends of the lower chord 4, and the friction device comprises a T-type sliding plate 5, friction plate 6, cover plate 7 and friction type high-strength bolt 8; The lower surface of the both ends of the lower chord 4 is installed with friction plate 6, T-sliding plate 5, friction plate 6 and cover plate 7 in turn; The flange of the T-type sliding plate 5 is provided with a long slot hole to enable slipping; The same circular bolt hole is processed on the friction plate 6, cover plate 7 and lower chord 4, and the position of the circular bolt hole corresponds to the center position of the long slot hole on the T-type sliding plate 5. The friction device is connected and fixed with the lower chord 4 through the cooperation of friction type high-strength bolt 8 and nut, and disc spring 9 is placed under the friction type high-strength bolt 8 and nut respectively to prevent loosening and deformation; There is a gap between cover plate 7, lower chord 4 and flange end of T-type sliding plate 5, and the gap is greater than the displacement of T-type sliding plate 5 when sliding, to avoid bearing between lower chord 4 and flange end of T-type sliding plate 5 when sliding.

[0022] FIG. 4 shows the bending-type friction steel truss coupling beam's hysteretic curve with friction device in the present disclosure. During the whole process, the resistance of steel truss coupling beam with friction device does not decrease.