Open AccessSeismic Fragility Assessment of Concrete Bridge Pier Reinforced with Superelastic Shape Memory Alloy
Author(s) -
Muntasir Billah A. H. M.,
Alam M. Shahria
Publication year - 2015
Publication title -
earthquake spectra
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.134
H-Index - 92
eISSN - 1944-8201
pISSN - 8755-2930
DOI - 10.1193/112512eqs337m
Subject(s) - pier , fragility , structural engineering , vulnerability assessment , sma* , plastic hinge , displacement (psychology) , bridge (graph theory) , shape memory alloy , engineering , incremental dynamic analysis , geotechnical engineering , reinforced concrete , seismic analysis , geology , materials science , computer science , composite material , medicine , psychology , chemistry , algorithm , psychological resilience , psychotherapist
In an attempt to reduce permanent displacement and damage, a hybrid reinforced concrete (RC) bridge pier configuration is considered in the present study. The plastic hinge region of the bridge pier is reinforced with superelastic shape memory alloy (SMA) and the remaining portion with regular steel. This paper focuses on fragility‐based seismic vulnerability assessment for a SMA‐RC bridge pier considering residual displacement, displacement ductility, and performance criteria as the demand parameters. Fragility curves are developed to assess the relative vulnerability of a SMA‐RC bridge pier and a conventional steel‐RC bridge pier using probabilistic seismic demand model (PSDM). The fragility curves are developed with a suite of 20 near‐fault ground motions using incremental dynamic analysis. The fragility curves provide insight into the failure probability of the bridge piers and aid in expressing the impact of SMA on the bridge pier vulnerability.
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