Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Earthquakes and Structures Volume 22, Number 2, February 2022 , pages 109-120 DOI: https://doi.org/10.12989/eas.2022.22.2.109 |
|
|
|
Nonlinear semi-active/passive retrofit design evaluation using incremental dynamic analysis |
||
Geoffrey W. Rodgers, J. Geoffrey Chase, Thomas Roland, Gregory A. Macrae and Cong Zhou
|
||
| Abstract | ||
| Older or damaged structures can require significant retrofit to ensure they perform well in subsequent earthquakes. Supplemental damping devices are used to achieve this goal, but increase base shear forces, foundation demand, and cost. Displacement reduction without increasing base shear is possible using novel semi-active and recently-created passive devices, which offer energy dissipation in selected quadrants of the force-displacement response. Combining these devices with large, strictly passive energy dissipation devices can offer greater, yet customized response reductions. Supplemental damping to reduce response without increasing base shear enables a net-zero base shear approach. This study evaluates this concept using two incremental dynamic analyses (IDAs) to show displacement reductions up to 40% without increasing base shear, more than would be achieved for either device alone, significantly reducing the risk of response exceeding the unaltered structural case. IDA results lead to direct calculation of reductions in risk and annualized economic cost for adding these devices using this net-zero concept, thus quantifying the trade-off. The overall device assessment and risk analysis method presented provides a generalizable proof-of-concept approach, and provides a framework for assessing the impact and economic cost-benefit of using modern supplemental energy dissipation devices. | ||
| Key Words | ||
| earthquake; economic loss; passive devices; semi-active devices; structural dynamics; supplemental damping | ||
| Address | ||
| Geoffrey W. Rodgers: Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch, New Zealand J. Geoffrey Chase: Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Thomas Roland: Department of Mechanical Engineering, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Gregory A. Macrae: Department of Civil Engineering, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Cong Zhou: Department of Civil Aviation, Northwestern Polytechnical University, Taicang, China | ||