钢筋混凝土受弯构件斜截面承载力的计算和腹筋的设计是《地下铁道与轻轨》课程的教学难点之一。文章以受集中荷载作用的矩形正截面混凝土简支梁为例,分析了混凝土简支梁斜截面的承载力,并提出了基于混凝土简支梁正截面剪力来计算其斜截面箍筋、弯起钢筋方法的教学设计。同时以某T形梁和某地铁地下框架结构车站的顶板为例,分析和配置了T形梁和车站底板在受剪力和弯矩共同作用下斜截面的承载力和腹筋。通过在《地下铁道与轻轨》课程中的教学实践表明,所提出的教学设计不仅有利于学生理解和掌握钢筋混凝土受弯构件斜截面承载力和腹筋的计算方法,而且还有利于增加学生的工程经验,可取得良好的教学效果。The calculation of load bearing capacity and design of web reinforcement in the oblique section of flexurally reinforced concrete members is one of the major difficulties in the course entitled Metro and Light Rail Transit offered to undergraduates. Taking a simply supported concrete beam with a rectangular normal cross-section subject to concentrated forces as an example, the load bearing capacity of an oblique section in the simply supported concrete beam is analyzed, and instructional planning on the method to calculate stirrups and flexural reinforcement on the oblique section of the beam based on shear forces on the normal cross-section of concrete beam is also presented. Meanwhile, taking both a T-shaped concrete beam and floor slab of a subway station as an example, the load bearing capacity of T-shaped beam and floor slab of the subway station subject to joint action of shear force and bending moment are also analyzed and arranged. 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 presented instructional planning does not only help undergraduates to understand and master the method to calculate the load bearing capacity and web reinforcement of the oblique section in flexural reinforced concrete members, but also help undergraduates to enhance their engineering experiences. The expected teaching aim is also attained.
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