Bidirectional collapse-proof damper with macroscopic NPR structure and bridge structure having same

Patent metadata

Field	Value
Publication number	US-11739810-B2
Application number	US-202217973572-A
Country	US
Kind code	B2
Filing date	Oct 26, 2022
Priority date	May 19, 2022
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

The present invention discloses a bidirectional collapse-proof damper with a macroscopic NPR structure and a bridge structure having the same, comprising a sleeve and a sliding rod; by adding a structure of a reducing part and a limiting body, a sliding gap exists between both ends of the limiting body and both inner ends of the reducing part; the rod body is connected with the inner side wall of the sleeve through an elastic element; the limiting body and the rod body can realize bidirectional slip in the sleeve, which have multi-level seismic performance.

First claim

What is claimed is:

1. A bidirectional collapse-proof damper with a macroscopic NPR structure, comprising:
a sleeve ( 1 ); the sleeve ( 1 ) has a hollow structure, and one end of the sleeve ( 1 ) is fixedly connected to a building component I; and the middle part of the sleeve ( 1 ) has a reducing part ( 11 ) with an increasing radial dimension;
a sliding rod ( 2 ), the sliding rod ( 2 ) is sleeved in the sleeve ( 1 ), the middle part of the sliding rod ( 2 ) is provided with a limiting body ( 21 ) slidably connected with the reducing part ( 11 ), and a sliding gap exists between both ends of the limiting body ( 21 ) and both inner ends of the reducing part ( 11 ); the rod body ( 22 ) of the sliding rod ( 2 ) located at both sides of the limiting body ( 21 ) is connected with the inner side wall of the sleeve ( 1 ) through an elastic element so that the limiting body ( 21 ) and the rod body ( 22 ) can realize bidirectional sliding displacement in the sleeve ( 1 ); and one end of the sliding rod ( 2 ) away from the building component I extends to the outer side of the sleeve ( 1 ) and is fixedly connected to a building component II;
the reducing part ( 11 ) has a bidirectional conical olive shape; and the reducing part ( 11 ) has a horizontal segment I ( 111 ) with a uniform cross section in the position with the maximum cross section in the middle part;
the limiting body ( 21 ) has the same structure as the reducing part ( 11 ), and the limiting body ( 21 ) has a horizontal segment II ( 211 ) with a uniform cross section in the position with the maximum cross section in the middle part; and the length of the horizontal segment II ( 211 ) is less than that of the horizontal segment I ( 111 ), and the horizontal segment II ( 211 ) is fitted to the horizontal segment 1 ( 111 );
stoppers I ( 12 ) are fixed on the inner side walls of both ends of the sleeve ( 1 ); stoppers II ( 23 ) are fixed on the rod body ( 22 ); and the rod body ( 22 ) is sleeved with a spring ( 3 ), and both ends of the spring ( 3 ) are respectively fixed on the stoppers I ( 12 ) and the stoppers II ( 23 );
the sleeve ( 1 ) is made of low carbon steel.

2. The bidirectional collapse-proof damper with a macroscopic NPR structure according to claim 1 , wherein one end of the sleeve ( 1 ) is fixedly connected with a fixing element ( 4 ), and the fixing element ( 4 ) is fixedly connected to the building component I.

3. The bidirectional collapse-proof damper with a macroscopic NPR structure according to claim 1 , wherein one end of the sliding rod ( 2 ) away from the building component I is fixedly connected with an end plate ( 5 ), and the end plate ( 5 ) is fixedly connected to the building component II.

4. The bidirectional collapse-proof damper with a macroscopic NPR structure according to claim 1 , wherein the sleeve ( 1 ) has a circular section.

5. The bidirectional collapse-proof damper with a macroscopic NPR structure according to claim 4 , wherein the inner side wall of the sleeve ( 1 ) is coated with a lubricant coating and a corrosion resistant coating.

6. The bidirectional collapse-proof damper with a macroscopic NPR structure according to claim 1 , wherein the number of bidirectional collapse-proof dampers with a macroscopic NPR structure is one or a plurality of groups.

7. A building structure, comprising the bidirectional collapse-proof damper with a macroscopic NPR structure of claim 1 .

8. A building structure, comprising the bidirectional collapse-proof damper with a macroscopic NPR structure of claim 2 .

9. A building structure, comprising the bidirectional collapse-proof damper with a macroscopic NPR structure of claim 3 .

10. A building structure, comprising the bidirectional collapse-proof damper with a macroscopic NPR structure of claim 4 .

11. A building structure, comprising the bidirectional collapse-proof damper with a macroscopic NPR structure of claim 5 .

12. A building structure, comprising the bidirectional collapse-proof damper with a macroscopic NPR structure of claim 6 .

Assignees

• Institute Of Urban Safety And Environmental Science Beijing Academy Of Science And Tech
• Univ Wenzhou

Inventors

• Liu Bideng
• Yang Yongli
• Wu Yubin
• Song Ruixiang
• Wu Qiong

Classifications

• F16F15/04 Primary

  using elastic means (single elements or their attachment F16F1/00 - F16F13/00); {(F16F15/023, F16F15/03 take precedence)} · CPC title

• E01D19/00

  Structural or constructional details of bridges · CPC title

• F16F7/00

  Vibration-dampers; Shock-absorbers (using fluid F16F5/00, F16F9/00; specific for rotary systems F16F15/10 {; belt tensioners F16H7/12}) · CPC title

• F16F2228/063

  Negative stiffness · CPC title

• E04B1/98 Primary

  against vibrations or shocks (on foundations E02D31/08); against mechanical destruction, e.g. by air-raids (against incendiary damage only E04B1/94; finishing work therefor E04F; buildings withstanding earthquake or the like, shelters, arrangements of splintercatching walls E04H9/00) · CPC title