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題名 | 部分預力混凝土樑之多準則最佳化設計=Multiobjective Optimum Design of Partially Prestressed Concrete Beams |
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作 者 | 盧俊愷; 劉英偉; 陳有志; | 書刊名 | 技術學刊 |
卷期 | 12:1 1997.03[民86.03] |
頁次 | 頁49-57 |
分類號 | 441.557 |
關鍵詞 | 多準則最佳化; 部份預力混凝土; 目標函數; 限制條件; Multiobjective criteria; Partially prestressed concrete; Objective function; Constraint; |
語文 | 中文(Chinese) |
中文摘要 | 本文提出一套部分預力混凝土樑之最佳化設計方法,以 ACI 318 - 89 規範為主 要公式參考的依據;限制條件式包含極限彎矩強度、最大容許應力、延展性、撓度、裂縫寬 度及使用性等,在考慮鋼筋、混凝土造價之情況下,以經濟及最小初始拱起量作為設計準則 ;規劃方法則利用多準則最佳化設計技巧。本文以二十公尺長承受均佈載重的簡支預力樑為 例,針對不同斷面作設計;最後並對跨徑、活載重、預力量及混凝土強度等設計參數作敏感 度的分析。 |
英文摘要 | In this present paper, the optimum design of partially prestressed conc rete beams has been addressed based on mulitiobjective criteria. The objective functions are cost and camber, which are to be minimized. The design variables are the cross section dimensions and the required prestressing steel.The constraints cover ultimate strength, workikng stress, ductility, deflection, crack width and serviceability. Simply supported prestressed concrete beams with two different cross-sectional shapes are used as examples. Sensitivity analysis of the optimum designs with respect to the design parameters including span, live load, prestress force and strength of the concrete, is also discussed. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。