体外及无粘结预应力筋极限应力研究进展

Review of Ultimate Stress in External or Unbonded Prestress Tendons

在过去的 40年中 ,为确定体外或无粘结预应力筋的极限应力 ,不少学者进行了相当数量的试验研究。本文在回顾这些研究历程的基础上 ,就主要的计算无粘结预应力筋极限应力公式进行了评述 ,并认为要合理精确地确定体外或无粘结预应力筋的极限应力 ,必须设法将结构的变形或挠度引入到预测公式中。

During the past forty years, many tests were done for the study of external or unbonded prestressed concrete members and determination the ultimate stress in external or unbonded prestress tendons The paper reviewed the major equations relating the prediction of the ultimate stress in unbonded prestress tendons, and the background of the development of these equations In order to give a reasonable and precise method predicting the ultimate stress in external or unbonded prestress tendons, the deformation or deflection of the members must be incorporated