Complete Quadratic Combination (CQC) Rule
Tips & Tricks
The CQC (Complete Quadratic Combination) rule is available in RFEM and RSTAB since version X.06.3039. In the General Data of the model you can activate the CQC rule and for Load Cases of type ‘Earthquake’ there are two new properties available, the ‘Angular frequency’ and the ‘Lehr's damping’.
In the calculation parameters of Result Combinations you can then select the CQC rule. The formulas and additional information how to apply this rule are illustrated in the figure.
Do you have questions or need advice?
Contact our free e-mail, chat, or forum support or find various suggested solutions and useful tips on our FAQ page.
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions