马云昌
      （同济大学 上海 200092）

[提要] 探讨预应力度对受扭构件开裂扭矩的影响，提出了计算钢筋砼及预应力砼构件开裂扭矩的实用公式。通过对作者所做10根预应力T形截面构件的试验结果及国内外其他学者的32根试件的试验数据的分析表明，本文提出的计算公式具有较高的精度。
[关键词] 预应力  受扭构件 开裂扭矩

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