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拱桥计算中的“弹性中心”是桥梁工程课程教学的一个重点和难点。以理论知识联系实际应用、从基础课到专业课的角度研究“弹性中心”的教学方法,从力法的基本思想引入基本概念,在弹性压缩、拱轴线偏离、温度变化和拱脚变位等不同荷载作用下,采用“弹性中心”求解无铰拱结构内力的特点着手归纳和总结,在给学生教学时可将基本概念由知识点上升到理论思维和解决问题的能力上。经实践检验这种教学方法具有良好的效果,在强化学生知识的同时还可培养学生的能力。
The “elastic center” in the calculation of arch bridge is a key and difficult point in the teaching of bridge engineering course. With the combination of theoretical knowledge and practical application, this paper studies the teaching method of “flexible center” from the basic class to the specialized class and introduces the basic concepts from the basic idea of the method of force. Under the conditions of elastic compression, arch axis deviation, temperature change and arch displacement Under different loads, the “elastic center” is used to solve the internal force of the hinge-free arch structure. At the same time, the basic concepts can be raised from the point of knowledge to the ability of theoretical thinking and problem solving. The practical test of this teaching method has a good effect, while enhancing student knowledge but also to develop students’ abilities.