钢筋混凝土偏心受拉构件正截面受力钢筋计算的教学设计与实践

Instructional Planning for Calculating the Reinforcing Steel Bars in the Normal Cross-Section of Eccentrically Tensile Reinforced Concrete Members

摘要: 基于为本科学生而开设的《地下铁道与轻轨》课程中钢筋混凝土偏心受拉构件正截面受力钢筋计算的教学内容，本文分析和提出了易于本科学生理解和掌握的钢筋混凝土小偏心和大偏心受拉构件中受力钢筋计算的推演方法，并通过对混凝土构件在受拉状态下静力和静力矩平衡关系的分析，提出了混凝土小偏心构件和基于荷载分解法的混凝土大偏心受拉构件中受力钢筋配置方法的教学设计。通过在《地下铁道与轻轨》课程中的教学实践表明，所采用的教学设计不仅有助于提高课程的教学质量，而且还有利于提高学生开展与地下铁道和轻轨结构相关的钢筋混凝土受拉构件中受力钢筋的设计能力与创新思维。

Abstract: Based on the instructional contents on the method of calculating and designing the reinforcing steel bars in the normal cross-section of eccentrically tensile reinforced concrete members in the course entitled Metro and Light Rail Transit offered to undergraduates, the method for calculating the reinforcing steel bars in small and large eccentrically tensile reinforced concrete members is deduced and presented in this paper, which is easy for undergraduates to comprehend and master. Through the analysis of the static equilibrium relationship and static moment equilibrium relationship in reinforced concrete members that are subject to tension condition, the instructional planning on the method of designing reinforcing steel bars in small and large eccentrically tensile reinforced concrete members is also presented. In particular, load decomposition method is employed to analyze the reinforcement of large eccentrically tensile reinforced concrete members. The practice of using the instructional planning presented in this paper for teaching the undergraduates the course entitled Metro and Light Rail Transit shows that the instructional planning does not only help improve the teaching quality of the course, but enhance the undergraduates’ ability and their innovative way of thinking to design the reinforcement of reinforced concrete tensile members related to subway and Light rail transit structures as well.