Kotoky, N;
Freddi, F;
Ghosh, J;
Raghunandan, M;
(2019)
BRBs uncertainty propagation in seismic retrofit of RC structures.
In:
Proceedings of the 13th International Conference on Applications of Statistics and Probability in Civil Engineering (ICASP13).
Seoul National University: Seoul, South Korea.
Preview |
Text
ICASP13_Kotoky_Freddi_Ghosh_Raghunandan_Updated_Submitted.pdf - Published Version Download (730kB) | Preview |
Abstract
Passive control systems, such as buckling restrained braces (BRBs), have emerged as an efficient tool for the seismic response control of new and existing structures by providing strength and stiffness to buildings, in addition to high and stable energy dissipation capacity. Systems equipped with BRBs have been widely investigated in literature, however, only deterministic description of the BRBs’ properties is usually considered. These properties are provided by the manufacturer and are successively validated by qualification control tests. The acceptance criteria specified by codal standards allows for some variation in the response of a single BRB by introducing a tolerance limit. Therefore, the ‘real’ properties of these devices could differ from the design values. This difference can affect the seismic response and potentially lead to an undesired seismic performance at the global level. This paper provides some preliminary insights on the influence of the BRBs’ uncertainty on the seismic response of a retrofitted RC frame. For the case-study, a benchmark two-dimensional RC frame is considered. A single retrofit condition is analyzed and the BRBs’ uncertainty is defined according to the tolerance limits of devices’ quality control tests. Cloud analysis and probabilistic seismic demand models are used to develop fragility functions for four different damage states. Fragility curves are defined for the bare and retrofitted frame while considering both the design and the ‘real’ values of the BRBs properties. The preliminary results show that the BRBs’ uncertainty could lead to an increase of the vulnerability up to 26.80% for the considered case-study.
| Type: | Proceedings paper |
|---|---|
| Title: | BRBs uncertainty propagation in seismic retrofit of RC structures |
| Event: | 13th International Conference on Applications of Statistics and Probability in Civil Engineering (ICASP13) |
| Location: | Seoul, Korea |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.22725/ICASP13.110 |
| Publisher version: | https://doi.org/10.22725/ICASP13.110 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10080450 |
Archive Staff Only
 |
View Item |
