The Importance of the β Coefficient in the Algorithm for Determining Seismic Load Using the Spectral Method

Abstract

This study examines a mid-rise school building and a high-rise multifunctional  center, both analyzed using the finite element method with all relevant design  loads. The seismic load criteria for the spectral methodology are taken from the current regulatory documents (PN 01.01-09) and (EN 1998–1:2004). 

The school building is a four-story structure with one underground level,  located in Tbilisi, near Lisi Lake. The building has a rectangular configuration, measuring 35.45 × 20.05 m with a maximum span of 7.1 m. Structurally, it  follows a frame-braced system with reinforced concrete walls and slabs. The  first floor height is 3.9 m, and the typical floor height is 4.2 m. 

The multifunctional center is a 44-story high-rise with one underground level, located in Batumi, near the coastline. It also has a rectangular configuration,  measuring 39.5 × 32.45 m with a maximum span of 13.1 m. Like the school, it  follows a frame-braced system with reinforced concrete walls and slabs. The  first floor height is 5.0 m, while the typical floor height is 3.5 m. 

Using the seismic criteria from the planning parameters and regulatory methodologies, all required coefficient values for the school building  calculations were determined, including the β coefficient.