《钢结构基本原理》教学过程中《材料力学》基本概念的过渡

The Transition of the Basic Concepts of Mechanics of Materials in the teaching Process of Basic Principles of Steel Structure

《材料力学》课程是《钢结构基本原理》课程的先修课程之一,二者联系紧密,《钢结构基本原理》教学过程中应注重《材料力学》基本概念的过渡。从全部焊缝有效截面对中和轴的抗弯截面模量、双角钢组合T形截面对x轴的回转半径、双肢格构式构件对虚轴的惯性矩三个方面介绍了材料力学截面几何性质的过渡;从轴心受力构件的强度条件、梁的强度条件介绍了强度计算公式的过渡;从梁的刚度介绍了刚度计算公式的过渡;从轴心受压构件的整体稳定介绍了稳定计算公式的过渡;从复杂应力作用下钢材的屈服条件、梁在复杂应力作用下的折算应力强度介绍了材料力学第四强度理论的过渡。使学生厘清钢结构课程与力学课程基本概念的脉络关系,以期提高《钢结构基本原理》课程的教学效果与教学质量。

The course of Mechanics of Materials is one of the prerequisites for the course of Basic Principles of Steel Structure,which is closely related.In the teaching process of Basic Principles of Steel Structure,attention should be paid to the transition of the basic concepts of Mechanics of Materials.The transition of geometric properties of material mechanical section is introduced from three aspects:the bending section modulus of all effective sections of welds to the neutral axis,the radius of gyration of double angle composite T-section to the x-axis,and the moment of inertia of double leg lattice members to the virtual axis.The transition of strength calculation formula is introduced from the strength conditions of axially stressed components and the strength conditions of beams.The transition of stiffness calculation formula is introduced from the stiffness of beams.The transition of stability calculation formula is introduced from the overall stability of axial compression members.The transition of the fourth strength theory of material mechanics is introduced from the yield condition of steel under complex stress and the converted stress strength of beams under complex stress.The purpose is to help students clarify the relationship between the basic concepts of the steel structure course and the mechanics course,so as to improve the teaching effect and quality of the course of Basic Principles of Steel Structure.