Function-recoverable prefabricated seismic shear wall structure

Patent metadata

Field	Value
Publication number	US-12044034-B2
Application number	US-202217830241-A
Country	US
Kind code	B2
Filing date	Jun 1, 2022
Priority date	Jun 2, 2021
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

A novel function-recoverable prefabricated seismic shear wall structure with replaceable components, which includes main structural components, connecting components and replaceable components. All components are connected by bolts or pins. The connections can provide sufficient strength to effectively connect adjacent upper and lower wall panels, or wall panel and coupling beam, together. The replaceable components are installed in the bottom region of the wall and coupling beams, which provide sufficient bearing capacity and stiffness for the building structure under service loads and dissipate seismic energy under the earthquake. The damage concentrates on the replaceable components which could be easily replaced after a strong earthquake so that the function of the building structure could be quickly restored. In addition, the replaceable components with different energy-dissipation mechanisms facilitate the shear wall structure to have multiple seismic fortification lines, and improve the seismic performance of the building structure.

First claim

What is claimed is:

1. A function-recoverable prefabricated seismic shear wall structure, which comprises: replaceable corner components, bottom connecting component, high-performance padding blocks, slotted steel plates, precast wall panel, wall connector, non-replaceable prefabricated coupling beam, replaceable coupling beam damper, prefabricated floor slab and foundation;
wherein,
the bottom connecting component located in the bottom of the shear wall structure, the bottom connecting component connects the foundation and the precast wall panel; the bottom connecting component comprises T-shaped steel beams, energy-consuming connection steel plates, high-strength pins, and high-strength bolts; the T-shaped steel beams comprises upper T-shaped steel beam and lower T-shaped steel beam, the upper T-shaped steel beam connects to the bottom of the precast wall panel and the lower T-shaped steel beam is embedded in the foundation;
the replaceable corner components and the high-performance padding blocks are disposed between the upper T-shaped steel beam and the lower T-shaped steel beam while the replaceable corner components are disposed at opposing ends of the shear wall structure and the high-performance padding blocks are disposed between the replaceable corner components;
the slotted steel plates are disposed at opposing sides of the shear wall structure in a thickness direction, and connect the foundation and the bottom connecting component;
the wall connector connects the precast wall panel at a lower floor and a second precast wall panel at an upper floor by bolt sleeves;
the prefabricated floor slabs is disposed on a side of the wall connector in horizontal;
the non-replaceable prefabricated coupling beam and the replaceable coupling beam damper are disposed between the precast wall panel and another precast wall panel in horizontal, and below the prefabricated floor slab; one end of the non-replaceable prefabricated coupling beam connects with the precast wall panel by high-strength bolts, the other end connects with the replaceable coupling beam damper;
the bottom connecting component, the high-performance padding blocks and the slotted steel plates are disposed in a foot of the shear wall structure, wherein, the energy-consuming connection steel plates are disposed in the bottom connecting component to provide anti-pull and anti-shear capacity, the high-performance padding blocks provide anti-compression and anti-shear capacity, and the slotted steel plates provide anti-shear capacity;
the shear wall structure can effectively ensure that the lateral stiffness and strength of the shear wall structure, and when the bottom of the shear wall structure is damaged under an earthquake, the energy-consuming connection steel plates, the high-performance padding blocks, and the slotted steel plates can be replaced so that the shear wall structure can be restored to the original functional level after the earthquake;
the shear wall structure has multiple seismic mechanisms:
a first one of the seismic mechanisms is the replaceable coupling beam damper;
a second one of the seismic mechanisms is the replaceable corner components;
a third one of the seismic mechanisms is the bottom connecting component, the high-performance padding blocks, and the slotted steel plates;
a fourth one of the seismic mechanisms is the non-replaceable prefabricated coupling beam.

2. The shear wall structure of claim 1 , wherein each replaceable corner component comprises outer steel tubes, inner steel tubes, infilled grout, energy dissipation steel bar, disc springs, stop round steel plate, perforated round steel plates, connecting steel tubes and perforated end plates;
the perforated end plates comprises a top perforated end plate and a bottom perforated end plate;
the outer steel tubes and the inner steel tubes are respectively welded on the bottom perforated end plate, and the infilled grout is filled between the outer and inner steel tubes, the inner wall of the outer steel tubes and the outer wall of the inner steel tubes are coated with polytetrafluoroethylene material to relieve the bonding between the inner and outer steel tubes and the infilled grout;
the perforated round steel plates are provided with holes, the outer diameter of the perforated round steel plates equals to the inner diameter of the outer steel tubes, and hole diameter of the perforated round steel plates equals the outer diameter of the inner steel tubes; the perforated round steel plates comprise an upper perforated round steel plate and a lower perforated round steel plate, the lower perforated round steel plate is in contact with the top surface of the infilled grout and the upper perforated round steel plate is welded to the bottom of one of the connecting steel tubes, the top of each connecting steel tube is welded to the top perforated end plate;
the disc springs are installed between the upper perforated round steel plate and the lower perforated round steel plate and combined in series and parallel, the inner diameter of the disc springs is larger than the outer diameter of the energy dissipation steel bar;
the energy dissipation steel bar is set inside each inner steel tube, one end of the energy dissipation steel bar is welded to the bottom perforated end plate and the other end of it is welded to the stop round steel plate, the bottom of the stop round steel plate is in contact with the top of the upper perforated round steel plate;
when each replaceable corner component is compressed, the disc springs are compressed along with the infilled grout, and the energy dissipation steel bar does not work due to separated gap between the stop round steel plate and the upper perforated round steel plate; the disc springs store the seismic energy through elastic deformation and convert the deformation energy into restoring force, which effectively reduces the residual deformation of the shear wall structure after an earthquake;
when the replaceable corner components are subjected to tension, an upper part of each replaceable corner component is lifted, the upper perforated round steel plate meets the stop round steel plate and the energy dissipation steel bar is stretched individually to dissipate seismic energy while the disc springs and the infilled grout do not come into play.

3. The shear wall structure of claim 1 , wherein the T-shaped steel beams are formed by welding a rectangular long steel plate, a perforated steel plate and stop steel plates;
the perforated steel plate is vertical to the rectangular long steel plate, the stop steel plates are disposed on opposing sides of the perforated steel plate;
the length and width of the rectangular long steel plate is consistent with the section dimensions of the precast wall panel, threaded holes are provided at opposing ends of the rectangular long steel plate in length direction for connecting an end plate of one of the replaceable corner components, the length of the perforated steel plate is less than the rectangular long steel plate, each stop steel plate is a steel sheet with stiffeners, the stop steel plates are welded to opposing ends of the perforated steel plate and connect one of the high-performance padding blocks;
furthermore, on the T-shaped steel beams which are connected to an upper wall, the high-strength bolts are welded to opposing sides of flange of the T-shaped steel beams to connect with the slotted steel plates; each one of the energy-consuming connection steel plates is a steel plate with I-shaped cross-section; the upper and lower ends of the energy-consuming connection steel plates are provided with holes, which are connected to the upper and lower T-shaped steel beams by the high-strength pins;
the energy-consuming connection steel plates are arranged on opposing sides of the perforated steel plate.

Assignees

• Univ Tongji

Inventors

• Jiang Huanjun
• Wang Haozuo
• He Liusheng

Classifications

• E04H9/0215

  involving active or passive dynamic mass damping systems · CPC title

• E04H9/027

  Preventive constructional measures against earthquake damage in existing buildings · CPC title

• E04B5/38

  with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element {(beams placed against one another and acting as permanent forms E04B5/23)} · CPC title

• E04B1/98

  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

• E04C5/165

  Coaxial connection by means of sleeves · CPC title