Tri-directional floor response spectra in irregular building
- Vol.103(1),Mar
- USA Springer 2022
- 48-57p.
The non-structural components play a vital role in industrial buildings. The past study indicates that the non-structural components damage loss surpass the structural damage loss. As a result, after an earthquake in critical, essential, and lifeline buildings, non-structural components that must be in operational conditions are essential. Industrial buildings accommodate a wide range of processes and provide workers with the necessary equipment for efficient industrial operations. The centre of mass and the centre of stiffness or rigidity in the building do not align because of the irregular distribution of floor mass, inducing torsion in the building. According to Indian Standard (IS 1893-part 4:2015), linear time history analysis with design basis earthquake is required to generate floor response spectra for use in non-structural component design. Thus, linear time history analysis was initially performed to generate floor response spectra, and then work was extended with nonlinear time history analysis. The primary goal of this present study is to focus on the impact of torsional irregularity on the floor response continuum with tri-directional earthquake time histories. Regular and torsional irregular buildings with G + 2 storeys are considered for this. The building location is considered in the highest seismic zone in India and positioned on medium soil. The study concluded that torsional irregularity in the structure resulted in floor response spectra in the two orthogonal horizontal and vertical directions with significant design forces for each direction of earthquake excitation. Thus, the structural designer must employ these three direction response spectra for precise and protective non-structural support design.