| 種別 | paper |
| 主題 | Prediction of Response in Ultimate Stage for Multistory Concrete Frames with Soft-First-Story Subjected to Ground Motions |
| 副題 | |
| 筆頭著者 | Shuefeng WEN（Graduate School of Osaka University） |
| 連名者1 | Kazuo SUZUKI（Department of Architectural Engineering） |
| 連名者2 | Ki-hyuk KWON（Graduate School of Osaka University） |
| 連名者3 | |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 15 |
| 号 | 2 |
| 先頭ページ | 1321 |
| 末尾ページ | 1326 |
| 年度 | 1993 |
| 要旨 | INTRODUCTION The soft-story-structure (thereafter, referred to as S.S.S.) system has been gradually attracting the attention of structural designers since M.Fintel et al proposed it in 1969. The basic concept used in the system is insulating the upper stories from high intensity ground motions, by introducing a soft(deformable) story in the lower part of the building.To realize the mechanism It Is required that the strength or/and stiffness of the soft story is intentionally degraded under the precondition that the story is capable of sustaining a large deformation.Thus,it is very important to estimate amount of deformations on the upper and soft stories of the S.S.S..Unfortunately, this is nearly impossible at present unless a laborious calculation supported by high-power computer is carried out step by step. The objective of this study is to give simple and practical method to predict the response of deformations (expressed through accumulated and maximum ductilities herein) for the multistory concrete frames with a soft-first-story (thereafter referred to as s.f.s.) when subjected to a severe earthquake. SUMMARY AND CONCLUSIONS (1) A method to predict the deformations (elastic or inelastic) of the multistory concrete frames with a soft-first-story system subjected to a severe earthquake motion are suggested, based on the energy principle. (2) The method is available to apply for such frames that have any restoring force system with or without braces and P-Δ effect throughout the structure (Eqs.10a-11b). (3) Satisfactory agreement between the values of the prediction and that of the dynamic responses analyzed numerically is illustrated in both cases with and without P-Δ effect (Figs.4-5). |
| PDFファイル名 | 015-01-2223.pdf |