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On experiments of the moment magnification of biaxially loaded R.C. columns
Authors
XU-QUAN CAI
蔡旭泉
Publication date
6 June 2014
Publisher
土木工程研究所
Abstract
雙向鋼筋混凝土細長柱的穩定性和強度折減,在設計和分析上是一個部可忽視的問題 ,過去的研究,多偏重近似法與計算模擬,缺乏試驗數據的比較與驗證。本研究係以 試驗的方法,求取R.C.細長柱,在軸向力和雙向彎曲載重下之行為,包含側向變形、 載重極限值、最大應變、彎曲放大細數......等,其結果與閻嘉義蔣志強所提 出直接設計分析法結果,和ACI Code彎矩放大係數法三者作一相互比較,以了解 R.C.細長柱之行為。 經研究比較結果顯示,三種方法所得之彎矩放大係數相當接近,以試驗所得結果為準 時,發現上述之直接分析法較保守,最大為9.74% 平均約3.10% 誤差,而ACI Code彎 矩放大係數法較不保守,最大5.8%平均約2.7%誤差。並且由軸力與側向變形之關係了 解,直接分析法與試驗的結果其變化趨勢約為一致。足見該直接分析法應可用以分析 細長柱二次效應之行為,且結果應頗為可靠
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Last time updated on 16/06/2016