THREE-DIMENSIONAL DYNAMIC COLLAPSE OF THIN-WALLED STEEL PIERS UNSER SEISMIC ACCELERATIONS

DOI Web Site 4 References

Bibliographic Information

Other Title
  • 地震動が作用する鋼製橋脚の3次元倒壊挙動と予測

Abstract

 In the event of mega earthquakes, the magnitude of their ground motions may exceed that specified for the design of elevated-girder bridges. Therefore, the responses of the bridges during the earthquakes will go beyond their ultimate state and may collapse in the worst cases. However, the behavior of the elevated-girder bridges beyond the ultimate state has been investigated only a little to say nothing about their collapse behavior. In order to reduce the damage during the mega earthquakes, it is essential to investigate the dynamic collapse of the bridges and develop some method to control the collapse behavior such that the progressive disproportionate collapse may not occur as observed during the 1995 Kobe earthquake. Herein, the dynamic collapse behavior of thin-walled steel piers is investigated as a key element whose failure may trigger the collapse of the entire elevated-girder bridge systems. First, shake table tests were conducted on single pier models in order to observe their dynamic collapse behavior in detail. Second, based on these test results, the accuracy of a FE-shell model was examined in terms of the applicability to the analysis of the dynamic collapse of the thin-walled steel piers. Third, accurate and practical criterions to predict the dynamic collapse behavior of the piers was discussed both theoretically and numerically.

Journal

References(4)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top