Evaluación de combinación de componentes horizontales de registros sísmicos usando los métodos: GMax, GM, GMRotDpp, GMRotIpp y SRSS.

Abstract

In this titration work, it will study the elastic spectra of the combination of seismic records using the methods: GMax, GM, GMRotDpp, GMRotIpp and SRSS. To calculate the spectral combinations of orthogonal horizontal components, a programming code was developed which, using the Newmark method (Chopra, 2014), calculates the dynamic response of each direction for a structure of 1 degree of freedom (acceleration, speed and displacement) with a constant damping value (ξ) of 5%. In addition, pseudo-accelerations were obtained based on the displacement response. 50 pairs of acelerograms were processed (29 records of the Ecuador-Pedernales 2016 earthquake and 21 records of the Chile-Maule 2010 earthquake). The differences between the methods of combining the horizontal components were compared. First, the study focuses on the difference between the spectra obtained in the GM, GMRotD and GMRotI combinations. Then, the difference that exists between the SRSS and GMax combinations is studied in a more detailed way than what was done by (Lascano, 2018). Finally, the differences found between the GMax and GM combinations were evaluated, GM to GMax conversion equations are proposed and these were compared with the GMax / GM scale factors proposed in the (American Society of Civil Engineers, 2017, p.205).