Civil and Environmental Engineering 2221A/B Study Guide - Final Guide: Limit State Design, Structural Load, Antisymmetric Relation
3 May 2019
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Def: occupancy live load and external natural things (wind, snow, earthquake) Calculated based upon the nbcc which provides factors and formulas. Determination of reactive forces and internal forces for members. Check to see that the members satisfy the design requirements for strength and serviceability. This is done with the limit states inequalities. A design condition based upon comparing the maximum stress due to loads with the maximum stress that the members can sustain. Factored load effects factored resistance where the factor depends on certain limit states such as ultimate (governs collapse), serviceability (governs function) and fatigue (governs a different type of collapse) You do this a different time for every limit state. Once for tension, once for compression, once for deflection Provides different factors based upon the intended use of the structure. For example, a schoolhouse would get a load factor of 2. 5 (to be super safe) whereas a warehouse would only get a factor of 1.
