鋼-混凝土組合截面設(shè)計實用算法
鄭愔睿1,2，朱杰江1
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鄭愔睿1,2，朱杰江1(1 上海大學(xué)土木工程系，上海 200072； 2 上海同磊土木工程技術(shù)有限公司， 上海 200433)［摘要］根據(jù)《型鋼混凝土組合結(jié)構(gòu)技術(shù)規(guī)程》（JGJ 138—2001）的基本假定，以及混凝土、鋼材、鋼筋材料的本構(gòu)關(guān)系，提出了鋼-混凝土組合截面設(shè)計的實用計算方法。首先將鋼材進行單元離散，再用數(shù)值積分的方法得到各離散單元的抗彎、抗壓（拉）承載力的計算公式，整個鋼材的承載力即為每個離散單元承載力之和。最后根據(jù)受力平衡條件，推導(dǎo)出了截面的配筋量計算方程組。方程組中所有參數(shù)均在文中給出了解析表達式，使該方法具有運算高效、便于實現(xiàn)電算化的特點。方法不受鋼-混凝土組合截面的受力狀態(tài)、鋼材形狀的限制，能夠解決《規(guī)程》中只對特定一種截面形式和受力狀態(tài)進行設(shè)計的問題，適用范圍廣泛。［關(guān)鍵詞］鋼-混凝土組合截面；任意形狀鋼材；離散單元；配筋計算中圖分類號：TU375 文獻標識碼：A 文章編號：1002-848X(2013)10-0036-05Practical algorithm for design of steel-concrete composite sectionZheng Yinrui1,2, Zhu Jiejiang1(1 Department of Civil Engineering, Shanghai University, Shanghai 200072, China; 2 Shanghai Tonglei Civil Engineering Technology Company, Shanghai 200433, China)Abstract: According to the basic assumptions in Technical specification for steel reinforced concrete composite structures (JGJ 138—2001) and constitutive relation of concrete, steel and reinforced bar, a practical algorithm for design of steel-concrete composite section was proposed. Discrete element method was applied to the steel and the formulas for bending capacity, compressive capacity and tensile strength of each discrete unit were given by numerical integration. The sum of the bearing capacity of each discrete unit is recognized as the bearing capacity of the whole steel. Finally, the equations for reinforcement calculation according to the force balance condition were deduced. Each parameter in the equations has an analytical expression, which makes it an efficient method and facilitates the realization of computerization. Compared with the method in the specification, the proposed method has a wider range of applications for it is immune to the limits of stress status and the shape of steel.Keywords: steel-concrete composite section; arbitrary-shaped steel; discrete unit; reinforcement calculation作者簡介：鄭愔睿，博士研究生，Email：caitong1117@126.com。參考文獻［1］董建菲，魏巍，辛欣. 型鋼混凝土結(jié)構(gòu)的研究發(fā)展及應(yīng)用［J］. 陜西建筑,2009(2): 5-7.［2］JGJ 138—2001 型鋼混凝土組合結(jié)構(gòu)技術(shù)規(guī)程［S］. 北京:中國建筑工業(yè)出版社，2001.［3］管仲國，黃承逵，王丹，等. 鋼筋混凝土異形柱雙向偏心承載力高效算法與程序設(shè)計［J］.工程力學(xué),2006,23(4): 134-139.［4］蔡健，鄭宇，楊春，等.箱形型鋼混凝土梁的試驗研究［J］. 華南理工大學(xué)學(xué)報:自然科學(xué)版,2002,30(7): 52-56.［5］中野昭郎.非對稱型鋼混凝土梁的試驗［J］.謝大璋，譯. 鐵道建筑,1995(2): 27-33.［6］王宇航，樊健生，郭亞飛，等.異形型鋼混凝土柱承載能力的試驗及分析［J］.清華大學(xué)學(xué)報：自然科學(xué)版,2010,50(6): 810-814.［7］薛永林，王新亭.鋼骨混凝土梁抗彎承載力計算的規(guī)范比較［J］.低溫建筑技術(shù),2005(1):45-46.
