【作者】 张立峰； 程绍革； 卢晋福；

【Author】 ZHANG Li-feng, CHENG Shao-ge, LU Jin-fu (University of Science and Technology Beijing, Beijing 100083, China; China Academy of Building Research, Beijing 100013, China)

【机构】 北京科技大学； 中国建筑科学研究院；

【摘要】 本文基于挠度的思想建立了体外预应力RC梁在极限状态下承载力的计算方法。该方法先确定梁跨中最大挠度,求得梁的变形曲线,进而计算体外钢筋的应力增量和梁的极限承载力。该方法避免了求解挠度时的刚度问题,概念清晰,简便易行,能满足工程的精度。更多还原

【Abstract】 This paper presents a method to calculate the ultimate bearing capacity of externally prestressed RC beams based on deflection. The proposed method predicts the maximum deflection of the mid-span of the beam and the deflection curve firstly; then to determine the stress increment of the external tendons and the ultimate bearing capacity of the beam. This method will be able to carried out without the rigidity of the beam and can satisfy the precision requirement in the construction engineering.更多还原