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首页> 外文会议>Canadian Dam Association 3rd Annual Conference, Sep, 2000, Regina, Saskatchewan >STATIC ICE LOADS FOR DAM SAFETY ANALYSES
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STATIC ICE LOADS FOR DAM SAFETY ANALYSES

机译：大坝安全分析的静态冰负荷

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An eight-year field program was undertaken from 1991-92 to 1998-99 to: (a) measure the loads in the ice sheet near the dam; (b) measure the load distribution between a gate and pier, and: (c) compare the loads on wooden and steel stoplogs. This paper is focussed on ice load evaluations for dam safety analyses. Much progress has been made. The most significant finding has been to identify the importance of water level changes on the resulting ice loads. Ice loads are much higher and more variable (compared to purely thermal loads) when significant, but not excessive, water level changes occur. Methods have been developed to predict the ice load. The algorithms predict thermal loads well. They are less accurate for loads produced by a combination of water level and ice temperature changes. Preliminary analyses have shown that ice loads can be affected significantly by the reservoir shape when the reservoir sides are significantly softer than the dam.
机译：从1991-92年到1998-99年进行了为期八年的现场计划，以：（a）测量大坝附近冰盖中的负荷； （b）测量闸门和桥墩之间的载荷分布，并且：（c）比较木制和钢制停机坪上的载荷。本文主要针对大坝安全性分析的冰负荷评估。已经取得了很大进展。最重要的发现是确定水位变化对产生的冰负荷的重要性。当水位发生显着但不是过度的变化时，冰负荷更高，并且变化更大（与纯热负荷相比）。已经开发了预测冰负荷的方法。该算法可以很好地预测热负荷。对于由水位和冰温变化共同产生的负载，它们的精度较差。初步分析表明，当水库侧比坝大得多时，水库形状会严重影响冰荷载。

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