Seismic safety aspects of gated spillways of large storage dams
Publish place: 4th International Conference on long-Term Behavior and Environmentally Friendly Rehabilitaion Technologies of Dams
Publish Year: 1396
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
LTBD04_088
تاریخ نمایه سازی: 25 آذر 1396
Abstract:
Gated spillways of large storage dams must be operable after the safety evaluation earthquake (SEE) such that the reservoir level can be controlled and a moderate flood can be released safely. Consequently, the gates, motors, control units and power supplies including emergency power generators must be operable and the gates should not experience any inelastic deformations causing jamming of the gates. Moreover, the spillway piers shall not exhibit any inelastic deformation in the cross-river direction, which is the weak axis of typical spillway piers. The trunnions must be able to withstand the high hydrodynamic pressures acting on the gates. Thus these elements must be designed and checked for the SEE. Vulnerable to high seismic loads are gated crest spillways due to the amplification of the support motion with respect to the grormd acceleration on the rock smface. The possible seismic hazards, the seismic performance criteria of gates and electro-mechanical equipment and the dynamic analysis of spillway structures are discussed.
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Authors
Martin wieland
Chairman, ICOLD Committee on Seismic Aspects of Dam Design, c/o Poyry Switzerland Ltd.,Herostrasse ۱۲, CH-۸۰۴۸ Zurich, Switzerland, Structural Engineer, Poyry Switzerland Ltd.Tehran, Iran
Sanaz ahlehagh
Chairman, ICOLD Committee on Seismic Aspects of Dam Design, c/o Poyry Switzerland Ltd.,Herostrasse ۱۲, CH-۸۰۴۸ Zurich, Switzerland, Structural Engineer, Poyry Switzerland Ltd.Tehran, Iran