Effect on the Performance Levels of a G+7 Structure for Different Cross Sectional Area of Structural Members

Abstract

In the past, structural engineers were concerned about earthquakes. Earthquakes not only cause structural damage, but they also have a significant impact on human lives. Performance-based seismic design has recently gained prominence over traditional methods. The structural design must meet one of four performance criteria set forth by FEMA. Fully Operational, Immediate Occupancy, Life Safety, and Near Collapse are the four performance levels. In this paper, a G+7 structure is subjected to ground vibrations from recent earthquakes in India, and the effect on performance levels for different cross sections of structural members such as beams, columns, and slabs of the structure is determined. The criteria used to classify the performance levels is displacement. Operational, Immediate Occupancy, Life Safety, and Collapse Prevention performance levels are 0.37 %, 0.70 %, 2.5 %, and 5.0 % of the overall height of the building, respectively. Time History Analysis is used to perform non-linear dynamic analysis. The analysis is carried out using the STAAD Pro software. It was observed that change in the cross sections of Beam and columns caused significant changes in the roof level displacements which in turn brought changes in Performance levels, while change in slab thickness caused no much changes in the performance levels of the structure.