| 種別 | Paper |
| 主題 | MODELING OF IMPACT LOAD CHARACTERISTICS AND ITS APPLICATION TO ANALYSIS OF RC SLAB STRUCTURES |
| 副題 | |
| 筆頭著者 | Michael William KING （Graduate School of Kobe University） |
| 連名者1 | Ayaho MIYAMOTO（Kobe University） |
| 連名者2 | Teruhisa ISHIBASHI（Graduate School of Kobe University） |
| 連名者3 | |
| 連名者4 | |
| 連名者5 | |
| キーワード | |
| 巻 | 13 |
| 号 | 2 |
| 先頭ページ | 1039 |
| 末尾ページ | 1044 |
| 年度 | 1991 |
| 要旨 | INTRODUCTION The impact force-time function and its pertaining characteristics for an impact collision are necessary not only for design of structures subjected to impulsive loads (design impact loads) but also to understand the overall dynamic behavior. The impact load characteristics (impact force-time curve, maximum impact force, duration of impact force, loading rate, impact force-time curve shape) of a deformable impacting body are simulated using a multi-mass model and then verified by experiments. Furthermore, evaluation of the resulting impact load characteristics are carried out on the effects of eccentricity in the impacting body and collision speed. Nonlinear dynamic response of RC slab structures are firstly considered by applying the impact load characteristics obtained from the multi-mass model to the layered finite element analysis (FEM). Secondly, a global method of analysis for the same impact phenomenon is considered by linking up both the analytical procedures. CONCLUSIONS The main conclusions from this Study can be summed up as follows: (1) The impact load characteristics for Soft impulsive collisions by deformable bodies into concrete structures can be roughly simulated using the multi-mass model, which consists of lumped masses interconnected by axial and rotational springs. In particular, the impact force until the first peak can be effectively simulated. (2) A global analytical method for the analysis of dynamic response of concrete structures subjected to soft impacts from deformable bodies can be attained by linking the proposed analysis of impact load characteristics, with the nonlinear dynamic analysis of RC slab structures. (3) An increase in collision speed during impact collisions causes the deflection in RC slab structures to concentrate around the mid-span, thus causing local failure to be more dominant. |
| PDFファイル名 | 013-01-2177.pdf |