This paper developed a probabilistic approach to estimate the seismic resilience of the shortmedium span bridges shocked by near-fault pulse-like ground motions. The seismic resilience demand of bridges is quantified. A two-span steel-concrete composite bridge is taken as a case study, whose finite element model is established by OpenSees. The double-side pulse-like ground motion records and non-pulse ground motions records are selected from 5 earthquakes based on the PEER NGA strong ground motion database. The spectral acceleration (Sa) is chosen as the intensity measure (IM), while the displacement of the middle pier is selected as the engineering demand parameters (EDP). A series of nonlinear dynamic time-history analysis of the case-study and regression analysis are aimed at simplifying the model of the engineering demand. Then, several techniques are available to calculate fragility curves for this type of bridge. Finally, the resilience analysis based on numerical approach is conducted with the aim to evaluate the capability of this type bridges to reduce the damage induced by earthquakes and minimize subsequent losses with an effective recovery. The results show that this type bridges are good of seismic resilience and the near-fault earthquakes have significant effect on that performance.
|Titolo:||Probabilistic seismic resilience analysis for bridges shocked by nearfault pulse-like ground motions|
|Data di pubblicazione:||2016|
|Citazione:||Liu, Y., Lu, D., & Paolacci, F. (2016). Probabilistic seismic resilience analysis for bridges shocked by nearfault pulse-like ground motions. In Maintenance, Monitoring, Safety, Risk and Resilience of Bridges and Bridge Networks - Proceedings of the 8th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2016 (pp.616-622). CRC Press/Balkema.|
|Appare nelle tipologie:||4.1 Contributo in Atti di convegno|