Alaa Masoud Abd EL-Rahman

First , I am Very Happy to Participate in Forum Such As This Forum , I need to Make Engineering Discussion With These Questions 1. Why We Make Scale Factor Between Static And Dynamic Seismic Analysis ? 2. After Scale Factor We Design By Load Combinations Included Dynamic Cases Only Or Static Load Only Or Dynamic And Static ? 3. What is Diaphragm And What is Importance of Diaphragm In Seismic And Wind? 4. When We Define Diaphragm? And We Define As Rigid Or Semi Rigid And What is the Different Between Them? 5. Different Between Displacement And Drift Due to Seismic ? 6. Displacement Due to Seismic Results From Etabs We Multiply it X 0.70 X R ,Why And What About Drift ? 7. We Make 3 Cases For Each Case ( X AND Y ) in Static Analysis What About Dynamic Same Or Not Static Analysis Ex Ex With + Eccentricity Ex With – Eccentricity Ey Ey With + Eccentricity Ey With – Eccentricity 8. Why We Don't Combine Seismic And Wind in Load Combinations? 9. In Dynamic Analysis , Forces Cause Mode Shapes Or Mode Shapes Cause Forces? 10. Difference Between Response Spectrum ( Dynamic ) And Time History , Which Best? 11. What is the Effect of Seismic in Slabs And Beams? 12. Design Of Slabs And Beams By Load Combination Included Seismic Right Or Wrong? 13. After Finishing 3D Model , What are the Checks For Seismic? 14. Slab On Grade , I Put In Etabs Or Not ? 15. How Building Make Damping For Seismic ,What is Factors Damping Depend on? 16. Different Between Point Drift – Story Drift – Diaphragm Drift ?