Question:
How do I apply the ASCE 7 Orthogonal Directional Combination procedure (100% + 30% rule) to my seismic load in a static analysis?
Answer:
1) The default orthogonal combination factor is set to 0.3 (30%). This value can be changed by going to ''Edit Parameters of Edition'' in the ''Load Cases & Combinations'' (Image 1)
► Image | Orthogonal Combination Factor https://www.dlubal.com/en/img/033526
2) Under the ''Load Cases'' tab, create the seismic load cases in the X and Y directions with Qe as the ''Action Category''. Activate the 'Additional Settings| Consider X and Y independently' option. Then, specify the direction under the ''Additional Settings'' tab (Image 2)
► Image | Seismic Load Cases https://www.dlubal.com/en/img/033527
3) Under the ''Design Situations'' tab, select the ''Edit Combination Wizard'' button. In the ''Standard Options'' tab, make sure that the ''Include orthogonal combinations'' option is activated (Image 3)
► Image | Include Orthogonal Combinations Option https://www.dlubal.com/en/img/033528
4) The generated COs including the orthogonal combination factor are listed in the ''Load Combinations'' tab (Image 4)
► Image | Generated COs with Orthogonal Combination Factor https://www.dlubal.com/en/img/033529
For more information, go to the FAQ page:
► https://www.dlubal.com/en-us/support-and-learning/support/faq/005299
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