Building response to two local earthquakes

Kazakh Research and Design Institute of Construction and Architecture, 21, Solodovnikova Street, 050060, Almaty, Kazakhstan

^* Corresponding author: lapin_1956@list.ru

Abstract

Instrumental records of two earthquakes with foci in the Almaty territory were obtained, recorded during one month on February 02, 2018, and February 15, 2018. The local seismic events registered in February 2018 in the Almaty territory are analyzed. These are 2 – 4 magnitude earthquakes with foci on the city’s territory. Using the AT 1105 sensors and the RSM-8 recorder, station No. 1 “Institute” recorded instrumental readings of accelerations in the basement and the four-story frame-brick building roof. For the first time, an instrumental recording was obtained, on which two groups of waves were identified. Spectral curves β are plotted. Effective duration is insignificant 0.12 – 1.74 sec. New results have been obtained regarding the behavior of a building under the influence of two earthquakes of different intensities. The absence of significant values of the spectral curves of the two earthquakes was noted. There is an increase in the intensity and number of local earthquakes in 2018 compared to 2007 – 2014. The results can be used to design earthquake-resistant buildings, taking into account the requirements of Eurocode 8.