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Performance Study of a SMA Bracing System for Control of Vibration Due to Underground Blast Induced Ground Motion

  • Rohan Majumder
  • Aparna (Dey) GhoshEmail author
Conference paper

Abstract

Underground blast load is important for all civil structures which are situated close to mines and construction activities. Large amplitude waves of high frequency which behave like an impulse load are the main characteristic features of the ground motion generated by underground blasting activities. The blast induced ground motion (BIGM) is quite significantly different from seismic ground motion and though there has been extensive research on the vibration control of structures subjected to the latter, the study of structural vibration mitigation for underground blast load is still not well developed. Lately, smart materials such as Shape Memory Alloys (SMAs) have attracted a great deal of attention in controlling the vibrations of structures. Passive control involves utilization of the superelastic property of SMAs such as Nitinol. The current study aims to investigate the potential of using SMAs as passive control devices for structures subjected to BIGM. This is carried out through a simulation study in standard finite element software on a three-storied steel frame structure with SMA bracings, subjected to ground accelerations due to underground blast. The investigation reveals that SMA devices provide considerably superior performance to that of the conventional steel bracings and may hold great potential for sensitive structures situated close to underground blasting sources.

Keywords

BIGM Bracing system Shape memory alloy Vibration control 

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Copyright information

© Springer India 2015

Authors and Affiliations

  1. 1.Department of Civil EngineeringIndian Institute of Engineering Science and Technology, Shibpur, (Formerly Bengal Engineering and Science University, Shibpur)HowrahIndia

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