DAMAGE OF STEEL PIERS IN HYOGO-KEN NANBU EARTHQUAKE ON JAN. 1995
(In Japanese)
On 17th of January 1995, Hyogo-ken Nanbu Earthquake occurred at the northern part of Awaji Island near Kobe. It was a Richter magnitude 7.2.
In the modern elevated bridges of highway, many steel piers were significantly damaged. This page shows the earthquake damage of steel piers by focusing on column and beam members with variable cross-sections.
 Steel piers in Osaka and Kobe districts
Portal frame type piers with box cross-section members:
1)[24kB], 2)[16kB]
Cantilever type pier with box-cross-section [11kB]
Cantilever T type pier with cylindrical cross-section [23kB]
Stiffened box cross-section used in steel piers [24kB]
Damage of steel piers due to variable cross-section
Local buckling at the change in cross-section of columns:
1)[10kB], 2)[10kB], 3)[17kB], 4)[11kB], 5)[22kB], 6)near manhole [7kB]
Plastic deformation of flange plate in beam near beam-to-column connection [19kB]
Shear buckling of web plates in beam member:
1) 1-storey frame [12kB], 2) 2-storey frame [12kB]
 JPEG pictures are still under construction.
Revised 20 April 1996
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