Title:
Collapse of Danish Prestressed Tanks
Author(s):
Troels Brøndum-nielsen
Publication:
Concrete International
Volume:
21
Issue:
4
Appears on pages(s):
55-56
Keywords:
buckling; collapse; cylindrical shells; instability; prestressed concrete; tanks; stability
DOI:
Date:
4/1/1999
Abstract:
A considerable number of tendon stressed tanks, representing a particular tank design practiced in Denmark, have collapsed in recent years. The tanks were constructed of precast concrete wall panels erected on an in situ base slab. The tanks were post-tensioned by exterior unbonded circumferential tendons, threaded through holes in the buttresses along the vertical wall joints. The collapses occurred during tensioning, up to a maximum four hours later; these collapses were limited to tanks with a large number of wall panels (about 40 to 64).