Citation

Hayasi R, Masuda Y, Hashimoto S, Kuriyama S. Int. J. Impact Eng. 2009; 36(9): 1150-1155.

Copyright

(Copyright © 2009, Elsevier Publishing)

DOI

10.1016/j.ijimpeng.2009.03.003

PMID

unavailable

Abstract

In an earthquake occurring directly under a city, the vertical impact induced from the source may cause a large amount of damage to a column and beam of the building. Model-based simulations are carried out with photoelastic material in order to examine the effect of a vertical impact on the building in the case of a near-field type earthquake. The dynamic photoelastic method combined with strain gages is utilized to conduct direct full field and real time observations of stress waves in a building due to vertical impact in laboratory earthquake experiments. The conditions under which vertical impact loading is applied to the model building in a controlled laboratory environment are derived from the data recorded for the 1995 Hanshin-Awaji earthquake in Japan. The experimental apparatus with which an impact of a longitudinal stress pulse is able to be applied to a model of a real building is shown. It is estimated from our earthquake simulations that large dynamic stress concentrations are produced in the beam-column joints of the building by the vertical impact arising from a seismic source located directly below a surface.