Us 5271197

United States Patent [191 Uno et al.

IlllllllllllllllllllllllllllllllIlllllllllllllllllllllllllllllllll|||||Illl USO05271 197A

Patent Number:

Date of Patent: 5,271,197

Dec. 21, 1993 [11]

[45]

[54]

[75]

[73]

[21]

[22]

[63]

[30] Sep. Sep. Jun. Jun.

[51] [52] [58]

EARTHQUAKE RESISTANT MULTI-STORY BUILDING

Inventors: Toshio Uno; Yoshitaka Yabe; Kiyoshi Ikura; Shinji Mase; Toshihiko Hirama; Hideo Shimizu, all of Tokyo; Masahiro Kato, Kashiwa; Fumio Ohtake, Kashima; Takehiko Terada; Tomomi Kanemitsu, both of Tokyo, all of Japan

Assignees: Shimizu Construction Co., Ltd., Tokyo; Sumitomo Metal Industries, Ltd., Osaka, both of Japan

Appl. No.: 928,080

Filed: Aug. 13, 1992

Related U.S. Application Data

Continuation of Ser. No. 543,l26, Aug. 6, i990, aban doned, which is a continuation-in-part of Ser. No. 376,922, Jul. 10, 1989, abandoned, which is a continua tion of Ser. No. l0l,663, Sep. 28, 1987, abandoned.

Foreign Application Priority Data

References Cited

U.S. PATENT DOCUMENTS

3,638,377 2/1972 Caspe. 4,991,366 2/1991 Teramuro et al..

OTHER PUBLICATIONS

“Earthquake-Resistant Limit State Design for Build ings” by Hiroshi Akiyama (University of Tokyo Press) 1985 Architecture-Sep. 1983 pp. 74-76.

Primary Examiner-Carl D. Friedman Assistant Examiner-Creighton Smith Attorney, Agent, or Firm-Cushman, Darby & Cushman

[57] ABSTRACT The present invention provides an earthquake resistant multi-story building which is characterized by having an energy concentration story. The energy concentra tion story has an elasto-plastic force-displacement rela tionship regarding horizontal force and displacement. The force-displacement relationship is characterized in that: (a) stiffness in elastic range (Fy/dy) is generally equal to an optimal stiffness of the same story according to an elastic design concept; (b) the yield strength Fy is generally less than 80% of an optimum yield strength; (c) stiffness in plastic range is positive and generally less than about a half of the stiffness in the elastic range; and (d) ultimate displacement is generally at least twice as large as the yield displacement. The energy concentra tion story is capable of entering into the plastic range while other stories are in the elastic range, and absorb ing vibration energy by plastic deformations thereof so as to decrease deformations of other stories when a large external force is exerted to the building.

[56]

13 Claims, 19 Drawing Sheets

26, 1986 [JP] Japan .............................. ._ 61-227781 30, 1986 [JP] Japan .............................. .. 61-231689

23,1989 [JP] Japan ............................ .. l-l61873

23,1989 [JP] Japan ................................ .. l-161874

Int. Cl.5 .................................. .. E04H 9/02

U.S. Cl. ..................................... .. 52/167 R

Field of Search .................... .. 52/ 167 R, 294, 729

US. Patent Dec. 21, 1993 Sheet 1 of 19 5,271,197

US. Patent Dec. 21, 1993 7Sheet 0t; 19 5,271,197

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US. Patent Dec. 21, 1993 Sheet 6 0f 19 5,271,197

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US. Patent Dec. 21,v 1993 Sheet 11 of 19 5,271,197

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Us 5271197