Optimal Damper Placement for Multi-story Building Structures
Date Issued
2014
Date
2014
Author(s)
Chang, Jen-Ter
Abstract
This dissertation proposes a simple and effective method for allocating viscous dampers to search for the optimal damper placement of the multi-story building structures. First, allocate dampers uniformly to the bare structure model as the initial damper placement. As the inter-story drift ratio is considered to be the performance index, the time-history seismic analysis is then performed. Next, check the inter-story drift ratio for the locations where dampers were added and move the dampers in the location with the lower inter-story drift ratio to the location with the higher inter-story drift ratio. Finally, repeat this process until the prescribed stop criterion is met. Three strategies for relocating dampers have been proposed and demonstrated with examples. The parametric study with different strategies has also been conducted to validate the feasibility of the proposed approach.
One strategy with linear viscous dampers, different story planar shear building structure models and earthquake records is chosen to perform the optimal damper placement in advance. Results are compared with those obtained using the simplified sequential search algorithm (SSSA) for benchmarking the effectiveness and efficiency of the proposed approach. Then, the proposed approach is applied to the three-dimensional unsymmetrical multi-story building structures and the strategy of moving one damper per step is chosen for the reason of simplification. One damper in the location with the lowest inter-story drift ratio is moved to the location with the highest inter-story drift ratio. Some building structure models with different stories and plan layouts have been investigated to place the linear viscous damper optimally. In the same way, results are compared with those obtained using the SSSA. It is found that the proposed approach requires much fewer analyses than the SSSA, even less than one-fifth of the SSSA, while their accuracy is comparable. Finally, the optimal placement for non-linear viscous damper is performed and the proposed approach is also verified.
Subjects
三維不對稱房屋結構:最佳阻尼器配置
SSSA法
黏性阻尼器
層間變位角
Type
thesis
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