8B. ANALYSIS PART 2

CHAPTER 8B 'ANALYSIS' 11 Then , the CEFR requires in paragraph 5.4.3 a check of their contribution to the overall stiffness of the building. If this is not complied with, some elements have to be 'reverted' back to the main ones. The check has to be done "manually" for the time being, using the procedure exactly described in this paragraph. Definitions: - Inclusion in the simulation of secondary elements means that they function normally as bipartite members and receive seismic forces. - Not participating in the simulation means that the designer must define them as bifacial at one or both ends. They do not participate in the absorption of seismic forces and should only be tested under vertical loads. In the program, the secondaries in all cases and for all analyses participate normally in the simulation. However, in some cases discussed below these elements are not checked. If the designer deems and wishes, he or she can manually tweak the degrees of freedom of these members. How they are dealt with then depends on the type of analysis being performed: • In the pre-control scenarios : all secondary members (horizontal and vertical) are not taken into account at all in the calculation of the adequacy ratios λ. • In the elastic analysis with method q , as well as in the corresponding analysis with method m : those minor elements that have fishy behavior, which means that it will be done for these elements have a satisfactory shear stress increment, the value of the coefficient γRd involved in this increment does not depend on the SAD but is always unity. • In the inelastic pushover analysis: the EIA allows not to check all the horizontal secondary elements. Also for the vertical secondary elements tested, the θpl/γRd limits have been adjusted for performance levels B and C. Finally, in the section of dimensioning for the existing material, a field has been added with the strength of secondary elements for concrete and steel where the value has been calculated with a factor γm=1, as provided by the CEE.