Abstract

BARRADAS HERNANDEZ, José E.  and  AYALA MILIAN, Gustavo. Sites of the valley of Mexico in which a value of Q for design lower than that stipulated for ductile structures must be considered. Ing. sísm [online]. 2015, n.92, pp.47-64. ISSN 0185-092X.

It is shows that in order of that the structures to be located on soils of the valley of Mexico with dominant periods higher than 1.65 s, and designed according guidelines to Appendix A of the NTCS- 2004, meets the established performance parameters, they must be designed for a maximum value of seismic behavior factor (Q); deducted in this study, which is less than the stipulated for ductile structures. In order to illustrate this two reinforced concrete frames have been designed: one for Q = 4 and the other one for the maximum value of Q. It is shown that the frame designed for Q = 4 responds inelastically when acting the design earthquake associated with the serviceability limit state, and therefore it does not meet the required performance parameters. Furthermore, it is shown that the frame designed for the maximum value of Q, responds elastically when acting the design earthquake associated with the serviceability limit state, and therefore meets the established performance parameters.

Keywords : Over-strength factor; Seismic behavior factor; Multilevel seismic design of buildings.