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

Haciefendioglu K., BANERJEE S., Soyluk K., Koksal O.

STRUCTURAL ENGINEERING AND MECHANICS, vol.53, no.5, pp.897-919, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 53 Issue: 5
  • Publication Date: 2015
  • Doi Number: 10.12989/sem.2015.53.5.897
  • Journal Name: STRUCTURAL ENGINEERING AND MECHANICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.897-919
  • Keywords: historic masonry bridge, blast-induced ground motion, multi-point response spectrum method, charge weight, charge center, ELEVATED WATER TANK, ABOVEGROUND STRUCTURES, STOCHASTIC RESPONSE, DAMAGE, SHOCK, SOIL
  • Karadeniz Technical University Affiliated: No

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.