Optimal Formation Assessment of Multi-layered Ground Retrofit with Arch-Grid Units Considering Buckling Load Factor
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This study presents an optimal shape generation method of local steel unit plates in arch-grid structures by using buckling load factor. ETABS software is utilized for a computational modeling of arch-grid to consider buckling analysis. According to the present optimal shape generation method, first, some shape types of a horizontal unit cell plate of arch-grid are assumed as initial designs. Second, they are analyzed through ETABS in terms of their buckling capacities. At the same time, appropriate vertical column bar sizes are achieved with respect to maximal stress of steel material and buckling load factor. Third, the generated arch-grid are combined to achieve optimal conditions of width and height of a given arch-grid structure, which shows the best structural feasibility to resist a given building. The arch-grid structure is extended by considering four different cases: a combined grid, an extended grid, a multi-story grid and a pyramid grid to verify the effectiveness of the present optimal shape generation method of steel arch-grid as numerical examples.
KeywordsArch-grid Buckling load factor ETABS Optimal shape Horizontal steel plate Vertical steel bar
This research was supported by a Grant (2017R1A2B4001960) from the National Research Foundation of Korea (NRF) funded by the Korea government.
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