- 期刊
陸域風機重力式淺基礎受反覆荷重之變形分析
Settlements of Gravity Foundation under Cyclic Loading
摘要
風力發電為目前發展技術較成熟的再生能源之一，我國擬於2030年達到設置450架陸域風機，共計1.2GW之目標。對於設置於承載力較佳地盤之陸域風機，重力式淺基礎因設置簡便，常被考慮為風機的基礎。風力發電機因長期承受風力作用，使基礎承受反覆偏心載重，當基礎傾斜變形隨偏心載重作用次數增加，可能使基礎產生不均勻沉陷，造成基礎承載力下降，影響風機運轉及發電功能。由於現有計算重力式淺基礎沈陷量之方法，大多無法合理將反覆載重之影響納入考量，因此陸域風機於使用年限內需透過監測校正法藍高程，以確保風機支承基礎穩定性。本研究針對設置於均質非凝聚性土壤之重力式基礎，配合平板載重試驗分析結果，修正應變影響因數法，計算重力式淺基礎受長期反覆偏心載重下之變形。利用本研究提出之方法，可合理推估陸域風機基礎受反覆集中與偏心載重下之基礎沉陷量，評估陸域風機重力式淺基礎長期之承載力。
並列摘要
Wind power has become a mature technology of renewable energy. For a well bearing capacity subsoil, gravity foundation is the most common foundation structures because of its simple construction. It is well known that cyclic loading of foundations which arises mainly from wind loads would cause permanent settlement and decreases the bearing capacity as the number of loading cycle increases. Since current gravity foundation settlement prediction methods cannot reasonably expand to cyclic loading behavior, this study combines plate loading test with strain influence factor method to analyze the deformation performance of gravity foundations under cyclic loading. By the method in this study, settlement of foundations under cyclic loading can be rationally predicted.
延伸閱讀
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