英语翻译The main purpose of structural analysis to determine for

英语翻译
The main purpose of structural analysis to determine forces and deformations of the structure due to applied loads.Structural design involves form finding,determination of loadings,and proportioning of structural members and components in such a way that the assembled structure is capable of supporting the loads within the design limit states.An analytical model is an idealization of the actual structure.The structural model should relate the actual behavior to material properties,structural details,loading and boundary conditions as accurately as is practicable.
Structures often appear in three-dimensional forms.For structures that have a regular layout and are rectangular in shape,subject to symmetric loads,it is possible to idealize them into two-dimensional frames arranged in orthogonal directions.A structure is said to be two-dimensional or planar if all the members lie in the same plane.Joints in a structure are those points where two or more members are connected.Beams are members subjected to loading acting transversely to their longitudinal axial and creating flexural bending only.Ties are members that are subjected to axial tension only,while struts (columns or posts) are members subjected to axial compression only.A truss is a structural system consisting of members that are designed to resist only axial forces.A structural system in which joints are capable of transferring end moments is called a frame.Members in this system are assumed to be capable of resisting bending moments,axial force,and shear force.

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