The lecture is concerned mainly with truss systems for roofs, which span in two directions (termed The technological construction of assemblies deviates to some extent from this theoretical situation and, in effect, is one of the main difficulties associated with these structural systems. Only perfect pins could completely ensure compliance with this loading condition. It is particularly important to ensure that the axes of the members coincide (Figure 1). In case it is impossible to guarantee the coincidence of member axis, the bending effect resulting from this must be evaluated. All loads are applied to the joints which are known as This definition assumes that no action is applied directly onto the members. INTRODUCTION 1.1ĝefinitionsįor this lecture, trusses are defined as structural systems in which the members are interlinked so that they are only subject to axial compressive or tensile forces. The lecture concludes by describing aspects of fabrication and erection particular to these structures. The principles of different methods of analysis are given. Design parameters are introduced and some rules for initial sizing are described. The lecture provides an historical background and an overview of different types of spatial truss systems: double-layer grids, barrel vaults and domes. Lecture 14.6: Special Single Storey Structures SUMMARY ![]() ![]() Lecture 7.12: Trusses and Lattice Girders RELATED LECTURES To describe fabrication and erection procedures. To give guidance on initial sizing and on analysis methods. ![]() To describe different types of spatial truss systems, and the design parameters to be considered. STRUCTURAL SYSTEMS: BUILDINGS Lecture 14.5: Space Structure Systems OBJECTIVE/SCOPE
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