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所在平台: Udemy |
课程主页: https://www.udemy.com/course/truss-analysis/
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**课程名称：** 7步掌握桁架分析 (Truss Analysis in 7 Easy Steps) **课程概述：** 本课程是静力学领域的重要主题——桁架分析的入门课程，也是结构工程入门课程中的核心内容。桁架结构广泛应用于土木工程（如桥梁、钢结构建筑、屋顶结构）、机械工程和航空航天工程（如起重机、空间结构、海上平台）等领域。 **什么是桁架？** 桁架通常由两端相互连接的直线杆件组成，杆件连接处被假定为理想的铰接，即允许自由转动，不能传递弯矩。所有外部荷载都作用在连接点上，因此桁架的每一个杆件都是两力构件。 **为何要学习桁架分析？** * **设计需求：** 在设计和建造桁架结构（如屋顶）时，需要计算每个杆件所承受的荷载，以确定其承载能力。 * **维修与加固：** 在现有桁架结构中，若需更换部分杆件，则需要精确计算这些杆件的内力，以选择合适的材料和截面尺寸。 **桁架分析方法：** 本课程将介绍两种主要的桁架内力分析方法： 1. **节点法 (Method of Joints)：** 通常用于设计新桁架结构。 2. **截面法 (Method of Sections)：** 通常用于分析现有桁架结构中特定杆件的内力。 这两种方法均基于结构在平衡状态下，其任意一部分也处于平衡状态的原理。 **课程结构：** 本课程将以简单易懂的7步流程，全面讲解桁架结构的静力分析。每一步都将通过演示和实例练习进行详细阐述和演示。
Truss Analysis is one of the most important topics in Statics, which is the first introductory in structural engineering curriculums. Trusses are structures that are widely used in civil engineering applications, such as bridges, steel buildings and roof structures. Trusses also appear in many mechanical and aerospace structures such as cranes, space structures, offshore platforms, and so on. What is a Truss? A truss is a structure usually consisting of straight members that are connected to each other at the two ends of each member. All members of a truss structure are connected together with pin joints, such that for the purpose of the design of these structures we assume the joints cannot carry or resist any moments. All external loads acting on a truss are assumed to be acting only at the joints, and therefore, all members of a truss are two-force members. Why Must We Learn Truss Analysis? First of all, if we plan to design and build a truss structure, such as a roof structure for carrying external loads, we need to find out how much load is carried by each member of the truss. Secondly, in the case of an existing truss structure, we may need to replace one or a few members. In this case, we need to find the internal forces carried by those few members within the truss structure. In both instances, the objective is to figure out and decide whether the members can sustain the forces or not and what size members and what type of cross sections are required. Types of Truss Analysis There are two major methods of analysis for finding the internal forces in members of a truss; the Method of Joints, which is typically used for the case of creating a truss to handle external loads, and the Method of Sections, which is normally used when dealing modifying the internal members of an existing truss. Both of these methods are based on the assumption that when a structure is in equilibrium, all pieces of the structure are also in equilibrium. Course Structure In this course, I will present a thorough overview of truss structures in the context of static analysis of structures. I will provide you with an easy-to-follow, 7-step process for the Method of Joints and the Method of Sections. Each of the 7 steps are clearly demonstrated in the presentation and sample problems, which I will walk through.
