Structural Engineering and Mechanics

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Multi-point response spectrum analysis of a historical bridge to blast ground motion

  • Haciefendioglu, Kemal (Department of Civil Engineering, Ondokuz Mayis University) ;
  • Banerjee, Swagata (Department of Civil and Environmental Engineering,The Pennsylvania State University) ;
  • Soyluk, Kurtulus (Department of Civil Engineering, Gazi University) ;
  • Koksal, Olgun (Vocational High School of Kavak, Ondokuz Mayis University)
  • Received : 2014.02.28
  • Accepted : 2014.10.28
  • Published : 2015.03.10
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Abstract

In this study, the effects of ground shocks due to explosive loads on the dynamic response of historical masonry bridges are investigated by using the multi-point shock response spectrum method. With this purpose, different charge weights and distances from the charge center are considered for the analyses of a masonry bridge and depending on these parameters frequency-varying shock spectra are determined and applied to each support of the two-span masonry bridge. The net blast induced ground motion consists of air-induced and direct-induced ground motions. Acceleration time histories of blast induced ground motions are obtained depending on a deterministic shape function and a stationary process. Shock response spectrums determined from the ground shock time histories are simulated using BlastGM software. The results obtained from uniform and multi-point response spectrum analyses cases show that significant differences take place between the uniform and multi-point blast-induced ground motions.

Keywords

Acknowledgement

Supported by : Scientific and Technological Research Council of Turkey(TUBITAK)

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