Two-stage energy dissipation type shed tunnel support structure connected by principle of Dougong and a design method thereof

Patent metadata

Field	Value
Publication number	US-11535990-B2
Application number	US-202117200932-A
Country	US
Kind code	B2
Filing date	Mar 15, 2021
Priority date	Oct 27, 2020
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A two-stage energy dissipation type shed tunnel support structure connected by a principle of Dougong and a design method thereof are provided. The two-stage energy dissipation type shed tunnel support structure includes a Dougong joint domain, crossbeams and columns. The Dougong joint domain includes section steel members, wavy-wall cylindrical elastoplastic buffers, U-shaped sliding connecting troughs and high-strength bolts. Multiple layers of the section steel members are orthogonally stacked to form a Dougong shape, the wavy-wall cylindrical elastoplastic buffers are arranged between adjacent layers of the section steel members, and the U-shaped sliding connecting troughs are arranged at upper and lower ends of the wavy-wall cylindrical elastoplastic buffers, which realizes a connection between the wavy-wall cylindrical elastoplastic buffers and a section steel in two orthogonal directions. Under an impact of small energy rockfalls, an elastic deformation of the Dougong joint domain is used to achieve a buffering.

First claim

What is claimed is:

1. A two-stage energy dissipation type shed tunnel support structure connected by a principle of Dougong, comprising:
a Dougong joint domain, a crossbeam and columns, wherein lower ends of the Dougong joint domain are supported on the columns, and upper ends of the Dougong joint domain support the crossbeam;
the Dougong joint domain comprises section steel members, buffers, and U-shaped sliding connecting troughs;
the section steel members are arranged in a plurality of layers, upper and lower layers of the section steel members are connected by the buffers, and the plurality of layers of the section steel members are orthogonally stacked to form a “gong”;
a “Dou”-shaped support structure comprises the buffers and the U-shaped sliding connecting troughs arranged at two ends of the buffers, and the U-shaped sliding connecting troughs at the two ends of the buffers are respectively connected to the upper and lower layers of the section steel members.

2. The two-stage energy dissipation type shed tunnel support structure according to claim 1 , wherein the crossbeam is supported on top section steel members of the Dougong joint domain, a first side of an angle steel is fixed to the top section steel members, and a second side of the angle steel is fixed to the crossbeam.

3. The two-stage energy dissipation type shed tunnel support structure according to claim 2 , wherein corresponding positions of connection surfaces of the angle steel and the crossbeam are preset with slotted holes, bolts penetrate through the angle steel and the crossbeam to pre-tighten the angle steel and the crossbeam, and when the two-stage energy dissipation type shed tunnel support structure is impacted, the crossbeam controllably slides along the slotted holes to form a friction energy dissipation surface.

4. The two-stage energy dissipation type shed tunnel support structure according to claim 3 , wherein the buffers are wavy-wall cylindrical elastoplastic buffers, wherein the wavy-wall cylindrical elastoplastic buffers are formed by pressing thin-walled short tubes of an elastoplastic material with wavy walls.

5. The two-stage energy dissipation type shed tunnel support structure according to claim 2 , wherein a flange is provided between the crossbeam and the top section steel members to ensure that the crossbeam accurately transmits an upper load to an expected position of the Dougong joint domain.

6. The two-stage energy dissipation type shed tunnel support structure according to claim 5 , wherein the buffers are wavy-wall cylindrical elastoplastic buffers, wherein the wavy-wall cylindrical elastoplastic buffers are formed by pressing thin-walled short tubes of an elastoplastic material with wavy walls.

7. The two-stage energy dissipation type shed tunnel support structure according to claim 2 , wherein steel plates are fixed at bottoms of the buffers below bottom section steel members of the Dougong joint domain, and bolts penetrate through the steel plates to fix the steel plates to the columns.

8. The two-stage energy dissipation type shed tunnel support structure according to claim 2 , wherein each of the U-shaped sliding connecting troughs is provided with slotted holes, and bolts penetrate through the slotted holes and the bolts are fixed in corresponding reserved holes on a side wall of a corresponding section steel member.

9. The two-stage energy dissipation type shed tunnel support structure according to claim 2 , wherein the buffers are wavy-wall cylindrical elastoplastic buffers, wherein the wavy-wall cylindrical elastoplastic buffers are formed by pressing thin-walled short tubes of an elastoplastic material with wavy walls.

10. The two-stage energy dissipation type shed tunnel support structure according to claim 2 , wherein each layer of the plurality of layers comprises more than two section steel members.

11. The two-stage energy dissipation type shed tunnel support structure according to claim 1 , wherein steel plates are fixed at bottoms of the buffers below bottom section steel members of the Dougong joint domain, and bolts penetrate through the steel plates to fix the steel plates to the columns.

12. The two-stage energy dissipation type shed tunnel support structure according to claim 11 , wherein the buffers are wavy-wall cylindrical elastoplastic buffers, wherein the wavy-wall cylindrical elastoplastic buffers are formed by pressing thin-walled short tubes of an elastoplastic material with wavy walls.

13. The two-stage energy dissipation type shed tunnel support structure according to claim 11 , wherein each layer of the plurality of layers comprises more than two section steel members.

14. The two-stage energy dissipation type shed tunnel support structure according to claim 1 , wherein each the U-shaped sliding connecting troughs is provided with slotted holes, and bolts penetrate through the slotted holes and the bolts are fixed in corresponding reserved holes on a side wall of a corresponding section steel member.

15. The two-stage energy dissipation type shed tunnel support structure according to claim 14 , wherein the buffers are wavy-wall cylindrical elastoplastic buffers, wherein the wavy-wall cylindrical elastoplastic buffers are formed by pressing thin-walled short tubes of an elastoplastic material with wavy walls.

16. The two-stage energy dissipation type shed tunnel support structure according to claim 14 , wherein each layer of the plurality of layers comprises more than two section steel members.

17. The two-stage energy dissipation type shed tunnel support structure according to claim 1 , wherein the buffers are wavy-wall cylindrical elastoplastic buffers, wherein the wavy-wall cylindrical elastoplastic buffers are formed by pressing thin-walled short tubes of an elastoplastic material with wavy walls.

18. The two-stage energy dissipation type shed tunnel support structure according to claim 1 , wherein each layer of the plurality of layers comprises more than two section steel members.

19. The two-stage energy dissipation type shed tunnel support structure according to claim 1 , wherein a side wall of the U-shaped sliding connecting troughs is attached to a side wall of the section steel members, and the side wall of the U-shaped sliding connecting troughs is pre-polished by a shot blasting to form a friction energy dissipation surface.

20. A design method of the two-stage energy dissipation type shed tunnel support structure connected by the principle of Dougong according to claim 1 , comprising the following steps:
a. presetting a protection capability E impact of a shed tunnel;
b. calculating an impact energy E structure received by the two-stage energy dissipation type shed tunnel support structure, wherein a calculation formula is expressed as:

E
structure

=

αφ
⁢

⁢

E
impact

;

wherein α is an energy dissipation distribution coefficient of the two-stage energy dissipation type shed tunnel support structure, wherein α is a first empirical value, and α is 0.2-0.4; φ is a safety factor, wherein φ is a second empirical va

Assignees

• Univ Southwest Jiaotong
• Southwest Jiaotong Univ Chengdu Design Institute Co Ltd

Inventors

• Yu Zhixiang
• Luo Liru
• Liao Linxu
• Jin Yuntao
• Zhang Lijun
• Xu Hu
• Zhao Lei
• Zhao Hao
• Zhao Shichun

Classifications

• E01F7/045 Primary

  Devices specially adapted for protecting against falling rocks, e.g. galleries, nets, rock traps (crash-barriers with nets E01F15/06; safety arrangements for blasting F42D5/00) · CPC title

• G06F2119/14

  Force analysis or force optimisation, e.g. static or dynamic forces · CPC title

• E01F7/04 Primary

  Devices affording protection against snowslides, avalanches or falling rocks, e.g. avalanche preventing structures, galleries (securing of slopes E02D17/20; roof snow-traps E04D13/10) · CPC title

• G06F30/13

  Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads · CPC title