Equivalent Viscous Damping for Self-Centering Precast Segmental Concrete Bridge Columns
碩士 === 國立臺灣科技大學 === 營建工程系 === 103 === The secant stiffness method is applied to the equivalent linearization of nonlinear system. Two types of hysteretic models and a set of 72 ground motions were considered. A new type of flag-shape hysteretic model was introduced which would be compared with the b...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Others |
| Language: | en_US |
| Published: |
2015
|
| Online Access: | http://ndltd.ncl.edu.tw/handle/71538767754750172894 |
| Summary: | 碩士 === 國立臺灣科技大學 === 營建工程系 === 103 === The secant stiffness method is applied to the equivalent linearization of nonlinear system. Two types of hysteretic models and a set of 72 ground motions were considered. A new type of flag-shape hysteretic model was introduced which would be compared with the benchmark model.
The two hysteretic models which were used in the analyses were calibrated by the experimental data results to get a set of parameter α, β, and γ. The nonlinear behaviors of the two models were evaluated with Jacobsen’s equivalent damping approach which also adopted the secant stiffness method for the linearization process. The evaluation revealed that Jacobsen’s approach overestimated damping in long period range on other hand underestimated damping in short period range. Two equations to modify the area-based viscous damping by Jacobsen’s approach for each type of hysteretic model were proposed. The two hysteretic models have also been verified by comparing the pseudo-dynamics loading result with the analyses result.
|
|---|