![]() ![]() Manual methods of analysis may be used to analyse the stresses, particularly in simple trusses. For building trusses to BS 5950 the members need only be designed at the ultimate limit state for strength, stability and fatigue where applicable, and at the serviceability limit state for deflection and durability(Tasou,2003). Some of these assumptions are necessary in the light of inadequate data others are introduced to simplify the calculation procedure to economic levels. This is not to imply that the calculations are meaningless, rather to emphasize the fact that the assessment of structural responses is the best estimate that can be obtained in the light of the assumptions implicit in the modeling of the system. They are therefore imperfect to a larger or smaller degree, depending upon the extent of inaccuracy built into the assumptions in modeling. Such models are based on idealizations of the structural behavior of the material and of the components. The analysis of structures consists essentially of mathematical modeling of the response of a structure to the applied loading.
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