| 種別 | paper |
| 主題 | Analytical Concrete Stud y Slabs on the Seismic Behavior of Reinforced |
| 副題 | |
| 筆頭著者 | Takayuki SHIMAZU（Professor Dr., Hiroshima University） |
| 連名者1 | Hideo ARAKI（Research Associate Dr., Hiroshima University） |
| 連名者2 | Aiman AIAWA（Graduate Student M. S., Hiroshlina 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 | 1297 |
| 末尾ページ | 1302 |
| 年度 | 1993 |
| 要旨 | INTRODUCTION In current design practices, floor slabs are frequently assumed to be perfectly rigid in their own planes.Under this assumption,lateral loads are distributed to vertical structural elements in proportion to the story stiffness of each element.Experience and research,however,have revealed more or less large variation in actual distributions of loads from those calculated based on this assumption.The deviation notably can occur in buildings having long and narrow floor plans; where the in-plane shear stiffness of the floor slabs is critical to the structural safety due to the force redistribution as their stiffness is decreased by cracking.To date,there have been only a few studies on the effect of slabs as diaphragms on the building response ,and even fewer on the slab behavior under both the in-plane and out-of-plane forces,as is the case with any building structure.However,one of these studies deals only with the case of pure bending and the majority of the analyses so far proposed of such slab behavior treat the in-plane problem ignoring the out-of-plane loading which might change the in-plane resisting mechanism of the structure.This paper proposes a finite element analytical system capable of describing the slab behavior under the combined loading by utilizing the layered Mindlin plate bending element and the membrane element and verifies it against the test results of eight test specimens subjected to combined loading conditions. CONCLUSIONS From the present investigation,the following conclusions were drawn:： 1.A finite element procedure using two basic elements (the Mindlin plate bending element and the membrane element) to analyze floor slabs under out-of-plane and in-plane loading was suggested.The constitutive laws were based on the modified compression field theory,with smeared crack representation.A good agreement could be obtained between both experimental and analytical results for out-of-plane load levels less than the ultimate level.2.Out-of-plane deflections increased with the increment of in-plane loading.Also this increase was more distinguished for test specimens with higher levels of out-of-plane load.These phenomena were noticed both experimentally and analytically. |
| PDFファイル名 | 015-01-2219.pdf |