US 11,808,026 B2
Resilient prestress-free steel structure formed by combining pin-ended columns with elastic centering beam
Junxian Zhao, Guangzhou (CN); Guiqiang Hao, Beijing (CN); Yun Zhou, Beijing (CN); Xilong Chen, Guangzhou (CN); Wei Han, Beijing (CN); Xiaona Shi, Beijing (CN); and Xuejing Chi, Beijing (CN)
Assigned to SOUTH CHINA UNIVERSITY OF TECHNOLOGY, Guangzhou (CN); and BEIJING BRACE DAMPING ENGINEERING TECHNOLOGY CO., LTD, Beijing (CN)
Appl. No. 17/598,887
Filed by SOUTH CHINA UNIVERSITY OF TECHNOLOGY, Guangzhou (CN); and BEIJING BRACE DAMPING ENGINEERING TECHNOLOGY CO., LTD, Beijing (CN)
PCT Filed Aug. 20, 2020, PCT No. PCT/CN2020/110149
§ 371(c)(1), (2) Date Sep. 28, 2021,
PCT Pub. No. WO2021/032144, PCT Pub. Date Feb. 25, 2021.
Claims priority of application No. 201910770775 (CN), filed on Aug. 20, 2019.
Prior Publication US 2022/0154445 A1, May 19, 2022
Int. Cl. E04B 1/24 (2006.01); E04B 1/98 (2006.01); E04H 9/02 (2006.01)
CPC E04B 1/2403 (2013.01) [E04B 1/98 (2013.01); E04H 9/02 (2013.01); E04B 2001/2406 (2013.01); E04B 2001/2439 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A resilient prestress-free steel structure, comprising an elastic centering beam and two pin-ended box column bases, wherein the elastic centering beam comprises two cantilever segment I-shaped steel beams, a middle segment I-shaped steel beam and buckling restrained high strength steel bars, the cantilever segment I-shaped steel beams are fixed to the two pin-ended box column bases, the middle segment I-shaped steel beam is connected between the two cantilever segment I-shaped steel beams, the buckling restrained high strength steel bars are symmetrically arranged on two sides of a web of the elastic centering beam along a beam central axis, and one end of each of the buckling restrained high strength steel bars is firmly connected with a web of each of the cantilever segment I-shaped steel beams, and the other end of each of the buckling restrained high strength steel bars is firmly connected with a web of the middle segment I-shaped steel beam; and the resilient prestress-free steel structure is arranged left and right symmetrically,
wherein each of the buckling restrained high strength steel bars comprises a high strength screw, a fixed cylindrical nut, two restraining steel tubes and a middle segment restraining short steel tube; the fixed cylindrical nut is fixed to a midpoint position of the high strength screw through a thread, the restraining steel tubes are symmetrically arranged on two sides of the fixed cylindrical nut and are firmly connected with the fixed cylindrical nut via butt welds, and inner diameters of the two restraining steel tubes are greater than a diameter of the high strength screw, such that a gap is reserved between the high strength screw and each of the two restraining steel tubes; the middle segment restraining short steel tube penetrates through the fixed cylindrical nut, two ends of the middle segment restraining short steel tube are firmly connected with the two restraining steel tubes via fillet welds respectively, and a midpoint position of the middle segment restraining short steel tube is aligned with the midpoint position of the high strength screw.