The results of the structural analysis can then be utilised to redesign the structure, taking into consideration a more precise calculation of the self-weight and size of the members. The loadings on a structure are calculated using codes and local requirements, and the forces and displacements in the members are calculated using theory of structures (structural analysis), which is the focus of this article. To effectively examine a structure, specific idealizations about how the components are supported and connected must be made. This approach to the design of structures, therefore, necessitates a basic understanding of material properties and the principles of mechanics that control material behaviour.įollowing the proposal of a preliminary structural design, the structure must be examined to ensure that it has the requisite stiffness and strength. Usually, numerous independent evaluations of various solutions are required before a final decision on which structural scheme is best can be made.
Thus, structural designs are expected to satisfy two basic limit states which are Īccording to limit state design, ULS requirements have to deal with issues like structural failure, overturning, buckling, instability, etc while SLS requirements have to deal with issues like deflection, vibration, cracking, etc, which affects the appearance and user experience of the building. In the design of civil engineering structures for public use, safety, stability, serviceability, functionality, aesthetics, as well as economic and environmental constraints must be considered by the engineer. Ship and aircraft frames, tanks, pressure vessels, mechanical systems, and electrical supporting structures are examples of other engineering areas. Therefore in some programs, theory of structures is also referred to as structural analysis.įigure 1: Theory of structures enables the design of complex civil engineering structures Theory of Structures and Structural Designīuildings, bridges, and towers are prominent examples of the application of theory of structures in civil engineering. A structure in this context is generally regarded to be a system of connected members that can resist a load. Theory of structures is a field of knowledge that is concerned with the determination of the effect of loads (actions) on structures. Types of supports in Theory of Structures.Theory of Structures and Structural Design.