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Load combination factors

Added April 1, 2016 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 
2016

Load combination factors

Load combination factors

In the load combination processprocess in which some simultaneously acting load groups are multiplied by their partial safety factors and combined with each other according to specific rules

Load combination rules are specific to a design process and are defined in design codes.

, Tekla Structures uses partial safety factors and, for example, reduction factors on load groups to create load combinations.

The partial safety factors needed in the limit state design are:

  • Unfavorable partial safety factor in the ultimate limit state (γ sup )

  • Favorable partial safety factor in the ultimate limit state (γ inf )

  • Unfavorable partial safety factor in the serviceability limit state (γ sup )

  • Favorable partial safety factor in the serviceability limit state (γ inf )

Depending on the codes you use, you may need to use other combination factors. For example, the Eurocode contains three reduction factors0 , ψ 1 , ψ 2 ). Reduction factors exclude the impractical effects of simultaneous loads.

You can use values for load combination(1) set of load groups multiplied by their partial safety factors that is created in the load combination process

(1) Each load combination represents a loading situation to be checked according to the design code.

(2) process in which some simultaneously acting load groups are multiplied by their partial safety factors and combined with each other according to specific rules

(2) Load combination rules are specific to a design process and are defined in design codes.

factors that are building code specific or user-defined.

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