STUDY OF ENVELOPES FOR SEISMIC RESPONSE VECTORS

Abstract

In this project, the Analysis of Building frames by the Time-history and the Response Spectrum Method in SAP2000 v 11 (Advanced) has been carried out. IS 1893 – 2002/ IS 456 – 2000 recommended to take peak values of responses such as Axial force P, Moments Mx and My to design RCC column sections, this leads to rectangular response envelop when earthquake are applied along the principal axes. In this approach upto 50 % extra reinforcement get provide. In this project present study on approach developed by Charles Menun and and Armen Der Kiureghian which consider combination of responses P, Mx and My at one instant this leads to elliptical response envelop, when earthquake are applied along principal axes and Supreme envelop (combination of all the elliptical envelops for full range of angle between principal direction of earthquake and structure) when principal direction of earthquake is not known in advance. This procedure is based upon the response spectrum method and the ...