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      馬云昌
      （同濟(jì)大學(xué) 上海 200092）

[提要] 探討預(yù)應(yīng)力度對(duì)受扭構(gòu)件開裂扭矩的影響，提出了計(jì)算鋼筋砼及預(yù)應(yīng)力砼構(gòu)件開裂扭矩的實(shí)用公式。通過對(duì)作者所做10根預(yù)應(yīng)力T形截面構(gòu)件的試驗(yàn)結(jié)果及國(guó)內(nèi)外其他學(xué)者的32根試件的試驗(yàn)數(shù)據(jù)的分析表明，本文提出的計(jì)算公式具有較高的精度。
[關(guān)鍵詞] 預(yù)應(yīng)力  受扭構(gòu)件 開裂扭矩

This paper studies the effect of prestressing on the cracking torque and presents a practical equation for predicting the cracking torque of reinforced and prestressed concrete members. The analysis of the author's tests results of 10 prestressed concrete T-beams and the additional 32 test data reported by other investigators at home and abroad shows the author's equation can precisely predict the cracking torque of reinforced and prestressed concrete members.
Keywords: prestressed concreie; torsion; cracking torque