Please use this identifier to cite or link to this item: http://localhost:8081/jspui/handle/123456789/13349
Title: APPLICATION OF SHAPE MEMORY ALLOY IN RESTRAINER RETROFITTING OF BRIDGES
Authors: Ali, Sadaqat
Keywords: CIVIL ENGINEERING;SHAPE MEMORY ALLOY;RESTRAINER RETROFITTING;BRIDGES
Issue Date: 2006
Abstract: Excessive relative displacement between adjacent spans and frames in bridges is major cause of bridge collapse during earthquakes. This loss-of-span type of failure is not acceptable in seismic design. Such type of damage must be prevented by designing suitable displacement limiting or energy dissipation devices. Various such devices also referred as unseating prevention devices have been developed by researchers around the world to prevent bridge collapse. In the present thesis, three such devices namely Shape Memory Alloy (SMA), Steel and Metallic restrainers are considered with main emphasis on application of SMA. These devices are designed such that reduction in relative displacement is similar, then number of restrainers required to achieve this reduction and energy dissipated per unit volume is compared. Software is developed as part of the work to perform non-linear time history analysis of a section of bridge. The two adjacent units of bridge and suspended span are idealized as a two degree of freedom system. The results show that all three devices are capable of reducing relative displacement and have high energy dissipation capacity. Further, SMA requires lesser number of restrainer rods to reduce relative displacement with significantly high energy dissipation per unit volume of restrainer as compared to other two restrainers. Hence it could be concluded that SMA-based devices offer promising advantages for development of next-generation seismic protection systems.
URI: http://hdl.handle.net/123456789/13349
Other Identifiers: M.Tech
Research Supervisor/ Guide: Upadhyay, Akhil
Thakkar, S. K.
metadata.dc.type: M.Tech Dessertation
Appears in Collections:MASTERS' THESES (Civil Engg)

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