Practical performance-based design of friction pendulum bearings for a seismically isolated steel top story spanning two RC towers
| Main Authors: | Kazantzi Athanasia K., Vamvatsikos Dimitrios |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 2021
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6397116 |
Daftar Isi:
- A case study of performance-based design is presented for a seismically isolated steel structure that rests on top of two adjacent high-rise reinforced concrete towers, the latter separated by means of an expansion joint. The isolation system comprises Friction Pendulum Bearings (FPBs) that are designed to accommodate two salient characteristics of the system. First, the isolated top foor is subjected to narrow-band foor acceleration histories as the ground motion excitation is fltered by the dynamic response of the supporting towers. Second, the displacement demands imposed to the FPBs are afected by the in-phase or out-of-phase movement of the supporting structures, with the latter case potentially giving rise to higher displacement capacity requirements for the bearings. In a search for a solution beyond conventional design norms, the probability of bearing failure associated with a wide range of FPB displacement capacities was determined via an explicitly risk-consistent performance-based seismic design. Overall, the case-specifc design approach is shown to be able to meet any desired performance objective, consistently determining the fnal compromise between safety, cost-efciency and practicability.