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EC8-based seismic design and assessment of self-centering post-tensioned steel frames with viscous dampers
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tzimas, Angelos S. Dimopoulos, Athanasios I. Karavasilis, Theodore L. |
| Copyright Year | 2015 |
| Abstract | This paper focuses on seismic design and assessment of steel self-centering moment-resisting frames (SC-MRFs) with viscous dampers within the framework of Eurocode 8 (EC8). Performance levels are defined with respect to drifts, residual drifts and limit states in the post-tensioned (PT) connections. A preliminary pushover analysis is conducted at the early phase of the design process to estimate rotations and axial forces in post-tensioned (PT) connections instead of using approximate formulae. Different designs of an SC-MRF with viscous dampers are considered to investigate all possible scenarios, i.e. use of dampers to achieve drifts significantly lower than the EC8 drift limit; to significantly reduce steel weight without exceeding the EC8 drift limit; or to reduce steel weight and achieve drifts lower than the EC8 drift limit. Nonlinear dynamic analyses using models capable of simulating all structural limit states up to collapse confirm the minimal-damage performance of the SC-MRFs. It is shown that the use of the preliminary pushover analysis makes the design procedure very accurate in predicting structural and non-structural limit states. Supplemental damping along with strict design criteria for the post-tensioned connections are found to significantly improve the seismic performance of the SC-MRFs. Moreover, the paper shows that SC-MRFs with viscous dampers have superior collapse resistance compared to conventional steel MRFs even when the SC-MRF is significantly lighter than the conventional MRF. |
| Starting Page | 60 |
| Ending Page | 73 |
| Page Count | 14 |
| File Format | PDF HTM / HTML |
| DOI | 10.1016/j.jcsr.2014.10.022 |
| Alternate Webpage(s) | http://wrap.warwick.ac.uk/68972/1/WRAP_1073800-es-230615-tdk_manuscript_2014_ver2.pdf |
| Alternate Webpage(s) | https://doi.org/10.1016/j.jcsr.2014.10.022 |
| Volume Number | 105 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
