部分预应力混凝土受弯构件开裂截面应力计算

摘要

On the basis of analyzing the stress distribution law of section of P. C. member in bending, the stress difference between prestressed reinforcement and adjacent concrete was given (this strain difference is always kept constant if the bond strength between the steel bar and the concrete is reliable), the new method to compute the stress of the cracking section was established. This method has the characteristics of clear concept, easy understanding and universality for eccentric compression member of concrete reinforced with bars.%在分析预应力混凝土受弯构件截面应变分布规律的基础上,给出了预应力钢筋与相邻混凝土的应变差(若钢筋与混凝土之间黏结可靠,这一应变差被始终保持不变),据此建立了预应力混凝土受弯构件开裂截面的应力计算公式新的推演过程.其过程具有概念清晰、易于理解的特点,所提出的方法对加筋混凝土偏心受压构件具有普遍适应性.