钢筋混凝土偏心受压构件正截面受力钢筋的设计是为本科学生开设的《地下铁道与轻轨》课程中的重要教学内容之一。由于这部分教学内容涉及较多的基本概念和理论推导,学生对设计方法的理解和掌握尚存在较大的困难。本文结合课程的教学内容...钢筋混凝土偏心受压构件正截面受力钢筋的设计是为本科学生开设的《地下铁道与轻轨》课程中的重要教学内容之一。由于这部分教学内容涉及较多的基本概念和理论推导,学生对设计方法的理解和掌握尚存在较大的困难。本文结合课程的教学内容,就钢筋混凝土偏心受压构件中受力钢筋的计算方法进行理论推导,并基于偏心受压构件的静力和静力矩平衡提出了混凝土偏心受压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,本文所研究和提出的教学设计有利于学生理解和掌握钢筋混凝土偏心受压构件中受力钢筋的计算和设计方法,并能启发和引导学生树立创新思维的意识。The design of reinforcing steel bars in the normal cross-section of reinforced concrete members subject to eccentric compression is one of the key instructional contents in the course entitled “Metro and Light Rail Transit” offered to undergraduates. As the instructional content involves many basic concepts and theoretical derivation, undergraduates still have great difficulties in understanding and mastering the design method. In this paper, combined with the teaching contents of the course, the method for calculating the reinforcing steel bars in reinforced concrete members due to eccentric compressive load is theoretically deduced, and based on both the static equilibrium and static moment equilibrium of eccentric compressive members, the teaching contents of designing the reinforcing steel bars in the normal cross-section of reinforced concrete members subject to eccentric compression are also presented. The teaching practice in the course entitled “Metro and Light Rail Transit” shows that the instructional planning studied and presented in this paper is conducive to helping undergraduates comprehend and master the calculation and design method of reinforcement in reinforced concrete members subject to eccentric compression and can inspire and guide undergraduates to establish the awareness of innovative thinking.展开更多
通过混凝土柱的小偏心受压性能试验,对三根不同偏心距砖骨料再生混凝土柱和一根相同原材料且同强度的普通骨料混凝土柱进行研究。砖骨料再生混凝土强度按照C30、砖骨料替代率为35% (砖骨料质量占所有粗骨料的质量比例)进行配合比设计,...通过混凝土柱的小偏心受压性能试验,对三根不同偏心距砖骨料再生混凝土柱和一根相同原材料且同强度的普通骨料混凝土柱进行研究。砖骨料再生混凝土强度按照C30、砖骨料替代率为35% (砖骨料质量占所有粗骨料的质量比例)进行配合比设计,水灰比、骨料用量、用水量与普通混凝土构件不同。分析砖骨料再生混凝土柱和同强度普通骨料混凝土柱在受力过程、破坏特征、变形能力与承载力等方面的差异。试验结果发现:砖骨料再生混凝土柱从加载到破坏的过程中具有和普通混凝土柱相似的受力阶段和破坏形态。相同的偏心距与同强度的普通骨料混凝土柱相比,略有降低,但承载力变化不大,可能因为砖骨料表面有较多缺陷和微裂缝且二次利用,导致强度难以满足要求。Three brick aggregate recycled concrete columns with different eccentric distances and one ordinary aggregate concrete column with the same raw material and the same strength were studied through the small eccentric compression performance test of the concrete column. The strength of the recycled concrete of brick aggregate is designed according to C30 and the replacement rate of brick aggregate is 35% (the quality of brick aggregate accounts for the quality ratio of all coarse aggregate). The water-cement ratio, aggregate consumption and water consumption are different from ordinary concrete components. The study analyzed the differences between brick aggregate recycled concrete columns and ordinary aggregate concrete columns of the same strength in terms of stress process, failure characteristics, deformation capacity and bearing capacity. The test results show that the recycled concrete column of brick aggregate has a similar stress stage and failure form to the ordinary concrete column. Compared with the ordinary aggregate concrete column of the same strength, the same eccentric distance is slightly reduced, but the bearing capacity does not change much. It may be because the brick aggregate surface has many defects and microcracks and secondary utilization, making it difficult to meet strength requirements.展开更多
文摘钢筋混凝土偏心受压构件正截面受力钢筋的设计是为本科学生开设的《地下铁道与轻轨》课程中的重要教学内容之一。由于这部分教学内容涉及较多的基本概念和理论推导,学生对设计方法的理解和掌握尚存在较大的困难。本文结合课程的教学内容,就钢筋混凝土偏心受压构件中受力钢筋的计算方法进行理论推导,并基于偏心受压构件的静力和静力矩平衡提出了混凝土偏心受压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,本文所研究和提出的教学设计有利于学生理解和掌握钢筋混凝土偏心受压构件中受力钢筋的计算和设计方法,并能启发和引导学生树立创新思维的意识。The design of reinforcing steel bars in the normal cross-section of reinforced concrete members subject to eccentric compression is one of the key instructional contents in the course entitled “Metro and Light Rail Transit” offered to undergraduates. As the instructional content involves many basic concepts and theoretical derivation, undergraduates still have great difficulties in understanding and mastering the design method. In this paper, combined with the teaching contents of the course, the method for calculating the reinforcing steel bars in reinforced concrete members due to eccentric compressive load is theoretically deduced, and based on both the static equilibrium and static moment equilibrium of eccentric compressive members, the teaching contents of designing the reinforcing steel bars in the normal cross-section of reinforced concrete members subject to eccentric compression are also presented. The teaching practice in the course entitled “Metro and Light Rail Transit” shows that the instructional planning studied and presented in this paper is conducive to helping undergraduates comprehend and master the calculation and design method of reinforcement in reinforced concrete members subject to eccentric compression and can inspire and guide undergraduates to establish the awareness of innovative thinking.
文摘通过混凝土柱的小偏心受压性能试验,对三根不同偏心距砖骨料再生混凝土柱和一根相同原材料且同强度的普通骨料混凝土柱进行研究。砖骨料再生混凝土强度按照C30、砖骨料替代率为35% (砖骨料质量占所有粗骨料的质量比例)进行配合比设计,水灰比、骨料用量、用水量与普通混凝土构件不同。分析砖骨料再生混凝土柱和同强度普通骨料混凝土柱在受力过程、破坏特征、变形能力与承载力等方面的差异。试验结果发现:砖骨料再生混凝土柱从加载到破坏的过程中具有和普通混凝土柱相似的受力阶段和破坏形态。相同的偏心距与同强度的普通骨料混凝土柱相比,略有降低,但承载力变化不大,可能因为砖骨料表面有较多缺陷和微裂缝且二次利用,导致强度难以满足要求。Three brick aggregate recycled concrete columns with different eccentric distances and one ordinary aggregate concrete column with the same raw material and the same strength were studied through the small eccentric compression performance test of the concrete column. The strength of the recycled concrete of brick aggregate is designed according to C30 and the replacement rate of brick aggregate is 35% (the quality of brick aggregate accounts for the quality ratio of all coarse aggregate). The water-cement ratio, aggregate consumption and water consumption are different from ordinary concrete components. The study analyzed the differences between brick aggregate recycled concrete columns and ordinary aggregate concrete columns of the same strength in terms of stress process, failure characteristics, deformation capacity and bearing capacity. The test results show that the recycled concrete column of brick aggregate has a similar stress stage and failure form to the ordinary concrete column. Compared with the ordinary aggregate concrete column of the same strength, the same eccentric distance is slightly reduced, but the bearing capacity does not change much. It may be because the brick aggregate surface has many defects and microcracks and secondary utilization, making it difficult to meet strength requirements.
