Analysis Aid Preparation for Self Supporting Fixed Ended Helical Stairs
| dc.contributor.advisor | Habte, Bedilu (PhD) | |
| dc.contributor.author | Gizaw, Yonathan | |
| dc.date.accessioned | 2018-07-31T06:23:48Z | |
| dc.date.accessioned | 2023-11-11T12:56:53Z | |
| dc.date.available | 2018-07-31T06:23:48Z | |
| dc.date.available | 2023-11-11T12:56:53Z | |
| dc.date.issued | 2015 | |
| dc.description.abstract | As amazing its appearance is, spiral stair has complex geometric configuration. As a result of this complexity, its analysis is challenging. And our Building Code of Standard doesn’t have analysis aid for these special structures, like the ones we have for slabs. Hence, the purpose of this study is to come up with a convenient and user friendly analysis tables and charts for the analysis of spiral stairs. This research follows analytical and finite element approach interdependently. The out come of the research is perceived by accompanying the comparative assessment of the two approaches. The analysis of spiral stairs is done in different approaches. First detail formulation is derived for the stair using strain energy concept considering the stair as twisting girder and in plane curved beam. Secondly, modeling and analysis is carried out using finite element technique as 3D twisting beam and 3D twisting shell stair slab separately. Then, graphical and tabular comparison is done between all approaches. In addition, modification factors are formulated considering variation of internal actions along stair width. More over, valid width is demarcated to limit the acceptable width for the applicability of centerline model for stain energy solution of helical stairs. Hence, the analysis tables and charts that are annexed in the write up together with the modification factors presented are very crucial tools for the analysis of these spectacular complex structures. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/10560 | |
| dc.language.iso | en | en_US |
| dc.subject | Structures | en_US |
| dc.title | Analysis Aid Preparation for Self Supporting Fixed Ended Helical Stairs | en_US |
| dc.type | Thesis | en_US |