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


HACIEFENDİOĞLU K., Banerjee S., SOYLUK K. , KÖKSAL O.

STRUCTURAL ENGINEERING AND MECHANICS, cilt.53, ss.897-919, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 53 Konu: 5
  • Basım Tarihi: 2015
  • Doi Numarası: 10.12989/sem.2015.53.5.897
  • Dergi Adı: STRUCTURAL ENGINEERING AND MECHANICS
  • Sayfa Sayıları: ss.897-919

Özet

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.