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（1 東南大學(xué)，南京 210096； 2 山東建筑大學(xué)，濟(jì)南 250014）

［摘要］就預(yù)應(yīng)力混凝土結(jié)構(gòu)中的綜合內(nèi)力、主內(nèi)力和次內(nèi)力給出其物理意義的解釋。通過對(duì)綜合內(nèi)力法分析，提出改進(jìn)綜合內(nèi)力法，該法適用于構(gòu)件承載力的計(jì)算和正常使用極限狀態(tài)的驗(yàn)算；較綜合內(nèi)力法邏輯更為嚴(yán)密；較次內(nèi)力法便于理解，不用計(jì)算次內(nèi)力，而且自動(dòng)包含次軸力對(duì)結(jié)構(gòu)的影響。有利于預(yù)應(yīng)力混凝土結(jié)構(gòu)的推廣與應(yīng)用。

［關(guān)鍵詞］預(yù)應(yīng)力混凝土結(jié)構(gòu)；預(yù)應(yīng)力；次內(nèi)力；綜合內(nèi)力；改進(jìn)綜合內(nèi)力法

Method of advanced resultant internal forces for design of modern prestressed concrete structures

Li Yuying 1，F(xiàn)u Chuanguo 2，Liang Shuting 1，Sun Xiuli 1

（1 Southeast University, Nanjing 210096, China; 2 Shandong Architectural and Civil Engineering Institute, Jinan 250014, China）

Abstract:The definition of resultant internal forces, first internal forces and secondary internal forces are presented. Modifying the method of resultant internal forces, the method of advanced resultant internal forces is obtained firstly. It is a uniform method for design of prestressed reinforced concrete structures. This method is suitable than for ultimate limit state analysis and serviceability limit state analysis. The method  is easier tobe understood than the method of secondary internal forces and the method of resultant internal forces.

Keywords:prestressed RC structure；prestressing；secondary internal forces；resultant internal forces；advanced resultant internal forces method

作者簡(jiǎn)介：李玉瑩，博士生，一級(jí)注冊(cè)結(jié)構(gòu)師，Email:lyy7705@163.com。