| 種別 | paper |
| 主題 | Behavior of Earthquake-Response Concrete Buildings Having the Natural Period Extended by Soft-First-Story |
| 副題 | |
| 筆頭著者 | Ki-hyuk Kwon（Osaka University） |
| 連名者1 | Kazuo Suzuki（Osaka University） |
| 連名者2 | Shuefeng Wen（Osaka University） |
| 連名者3 | |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 16 |
| 号 | 2 |
| 先頭ページ | 1295 |
| 末尾ページ | 1300 |
| 年度 | 1994 |
| 要旨 | 1. INTRODUCTION Through the studies about the Soft-Story structure, authors had proved that the structural designers can control the natural period of concrete buildings with using Soft-First-Story(S.F.S.).and the estimating equations of the natural periods proposed by authors can be applied not only to estimating the natural periods of concrete buildings with S.F.S. but also to determining the basic conditions of columns of S.F.S. for attaining the designed natural periods. But, even if the results calculated from these equations are applied to adjust the conditions of S.F.S., the designed natural period can not be attained easily because applying these results has many restrain factors, for example; Young's modulus, the strength of concrete and the slanderness ratio, etc. For attaining the designed natural period, these restrain factors must be studied to determine the amount of influence on the natural period of concrete buildings and then based on this research, the calculated values must be revised. And so the study on the influence of these factors on the natural periods had been researched in the area of the principal tendency, however, the study on the practical application of the results obtained from the research of this principal tendency has not been done. Besides, for using S.F.S. structure in concrete buildings as the earthquake-resistant-system the dynamic behavior of multistory concrete buildings with S.F.S. should be examined and analyzed carefully when these buildings are subjected to the earthquake. Thus, firstly this study discusses about the practical method of adjusting the conditions of S.F.S. and examines the character of this S.F.S. in the earthquake response. Secondly, in this study the behavior of the earthquake response of concrete buildings with above mentioned S.F.S. and the influence of S.F.S. on the behavior of these buildings are studied. 5. CONCLUSIONS The following conclusions can be drawn from the results of this study; 1) In case of adjusting the conditions of Soft-First-Story, the restrain factors, such as the slenderness ratio, the strength of concrete and Young's modulus etc., are more carefully examined in the low rise-building than in the middle or high rise-building because these factors have more influence on the low rise-building. 2) The proper natural period exists in extending the natural period with the usage of Soft-First-Story and in case of this study, the proper natural period of the 8-story building is 3.39sec and the 20-story building is 3.66sec. 3) The structural designers have an enough solution about the earthquake resisting design with neglecting the influence of the earthquake force acted to upper stories as they find only the proper usage of Soft-First-Story because the earthquake response is concentrated on Soft-First-Story. |
| PDFファイル名 | 016-01-2216.pdf |