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（哈爾濱工業(yè)大學建筑設(shè)計研究院， 哈爾濱 150090）
［摘要］鋼筋混凝土剛架拱梁與索梁結(jié)構(gòu)由普通鋼筋混凝土與預應力鋼筋混凝土兩種構(gòu)件組成，將預應力作為等效荷載作用進行結(jié)構(gòu)內(nèi)力分析與構(gòu)件截面設(shè)計時，需要計算主彎矩、次彎矩和綜合彎矩。通過七個正截面內(nèi)力計算簡圖推證：只需計算一個綜合彎矩，再計入預壓軸力對截面的作用，即可建立適合預應力復雜結(jié)構(gòu)在承載能力極限狀態(tài)下的截面計算公式，及正常使用極限狀態(tài)下的鋼筋應力增量計算公式。因預應力作用與外荷載對結(jié)構(gòu)構(gòu)件作用的方向相反，使構(gòu)件控制截面上的內(nèi)力絕對值變小，使結(jié)構(gòu)可以承擔更大荷載。
［關(guān)鍵詞］剛架拱梁與索梁； 作用內(nèi)力； 綜合彎矩； 強度差； 反向作用
中圖分類號：TU378文獻標識碼：A文章編號：1002-848X(2017)23-0027-03
Analysis on calculation method of prestressed concrete rigid frame arch beam and cable beam
Zhang Xiaodong, Bai Fubo, Yuan Zhenjun
(The Architectural Design and Research Institute of HIT, Harbin 150090, China)
Abstract:Reinforced concrete rigid frame arch beam and cable beam structure are composed of common reinforced concrete components and prestressed reinforced concrete components, and it needs to calculate the primary and secondary bending moments and comprehensive bending moment when prestress is taken as equivalent load action for structural internal force analysis and member cross-section design. The internal force calculation diagrams for seven cross-sections were derived to prove that it only needs to calculate a comprehensive bending moment combined with the effect of prestressed axial force on cross-section to establish calculation formula of cross-section for prestressed complex structure under the ultimate state of bearing capacity and establish calculation formula of steel bar stress increment under the ultimate state of serviceability. The structure can bear more loads because the action of prestressed force has the opposite direction to the external loading on the structural members to reduce the absolute value of the internal force on the control cross-section of the members.
Keywords:rigid frame arch beam and cable beam; internal force action; comprehensive bending moment; strength difference; reverse action
*黑龍江省應用技術(shù)研究與開發(fā)計劃項目（GA13A510）。
作者簡介：張小冬,碩士，教授，一級注冊結(jié)構(gòu)工程師，Email:163zhangxiaodong@163.com。
