Influence of Near-fault Pulse-like Motion Characteristics on Seismic Performance of Tall Pier Bridges with Fragility Analysis

ABSTRACT

This paper focuses on the effects of near-fault motion characteristics on the seismic performance of tall pier bridges. Using the analytical models calibrated by shake table tests, fragility analysis was conducted investigating the influence of near-fault motion features (i.e., period (T_v) and number (N) of velocity pulses). Results show that seismic fragility of the tall pier under near-fault motions is highly correlated to T_v and the damage states considered, while the influence of N is less significant. Consequently, when considering the seismic behavior of tall piers under near-fault pulse-like motions, choosing records with respect to T_v may lead to more reliable results.

KEYWORDS:

• Tall pier bridges
• near-fault motions
• fragility analysis
• period of velocity pulses
• number of velocity pulses

Additional information

Funding

The authors gratefully acknowledge the support by the China Postdoctoral Science Foundation [No. 2019M651468], the National Natural Science Foundation [No. 51678434, No. 51908348], and the Project of State Key Laboratory for Disaster Reduction in Civil Engineering of China [No. SLDRCE15-A-01].