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Load behavior and factors in Eurocode 7

Load behavior and factors when a EC7 design approach is used


When an analysis uses design approach such as EC7, each external load must be categorized as favorable or unfavorable. In the default mode when no load combination is used, the software program automatically categorizes loads as favorable or unfavorable based on their location and direction relative to the wall and the excavation. Hence, loads that push the wall towards the excavation are treated as unfavorable, while loads that push the wall towards the retained soil are treated as favorable. In all design approach methods, favorable variable loads are ignored in the analysis while favorable permanent loads are multiplied by a safety factor equal to 1. Unfavorable loads get typically multiplied with factors ranging from 1 to 1.5 depending on the examined design approach and the load nature (permanent vs. variable).


When a load combination is used, the user has the option to manually select the behavior of each load.


 

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