Seismic Performance of Semi-rigid Jointed Steel Frame Including Soil-Structure Interaction

This paper demonstrates the seismic response of a semi-rigid jointed fixed base steel frame structure. It also compares the results with a semi-rigid jointed steel frame structure that considers the effect of soil-structure interaction [SSI]. [1] To be more realistic, this study examines the far-field, the near-field with directivity [3], and the near-field with fling step earthquake. To mitigate the consequences of earthquakes it is necessary to make an analysis and a realistic evaluation of vital structures considering the actual behaviour of joints and the interaction of structure with the soil. Determining the vulnerability [4] of a frame during a seismic event depends critically on the exact behavior of the joint, the connection between beams and columns. This article examines the impact of earthquakes type on the dynamics of fragility curves. For certain pick ground acceleration levels, the fragility curve that represents base shear varies greatly depending on the kind of earthquake. From 0.2g to 0.8g, it is the most sensitive. SSI impact significantly enhance the floor displacement [2]. The fragility curves [6] show a considerable degree of variance in their graphical representation when the SSI impact is considered. Lower displacement is seen when the base is fixed, but the SSI effect causes a significant rise. This study uses incremental dynamic analysis (IDA) [8] to present the combined influence of semi-rigid joint and SSI on the seismic performance [7] of the structure, which has not been reported in any paper despite a large number of studies on the same subject.