چکیده مقاله
Concentration of seismic damage on shorter piers is a common problem for irregular bridges subjected to strong ground motion This study investigates the effectiveness of shape memory alloy SMA restrainer bars to reduce the seismic vulnerability of irregular bridges SMAs are a unique class of materials that have the ability to undergo large deformations, while reverting back to their undeformed shape through the removal of stress superelastic effect To evaluate the effectiveness of the devices, nonlinear time history analyses are performed on a reinforced concrete single column bent viaduct using a suite of representative ground motions The results showed that superelastic restrainers can significantly reduce the bridge damage index ratio BDIR mean response in controlled bridge compared to as built bridge due to alleviating damage concentration on short pier It is also found that SMA devices can effectively participate in dissipating hysteretic energy
کلیدواژهها
نویسندگان
Seyed Mohyeddin Ghodratian
School of Civil Engineering, University of Tehran, Tehran, Iran
مهدی قاسمیه
Associate Prof, School of Civil Engineering, University of Tehran, Tehran,
محمد خان محمدی
Seyed Mohyeddin Ghodratian School of Civil Engineering, University of Tehran, Tehran, IranMehdi Ghassemieh Associate Prof, School of Civil Engineering, University of Tehran, Tehran,
شیوه ارجاع
Ghodratian, Seyed Mohyeddin and Ghassemieh, Mehdi and Khanmohammadi, Mohammad,1391,Seismic Assessment of Irregular Bridges Equipped with Shape Memory Alloy,9th International Congress on Civil Engineering,Isfahan
ارائهشده در
مجموعه مقالات نهمین کنگره بین الملی مهندسی عمران19 اردیبهشت 1391 · اصفهان