Seismic Performance Assessment Of Steel Structures Considering Soil Effects

Abstract

Nowadays, extreme need for construction of buildings in rural area increased the floor number of buildings, in which, the soil under foundation can affect the performance of buildings. In this research, soil effects were investigated to show soil type effects on the performance levels of steel structures. To do this, the 2-, 4-, 6-, and 8-story structures were modeled using ETABS software; then, the models were verified in Opensees software for collapse state analysis. Incremental Dynamic Analyses (IDAs) are employed using far field, near field records having pulse like and no pulse effects. The results of analysis provide informations regarding the influence of soil types of B, C, D, and E on the seismic performance level of steel structures. The results confirmed that the soil types have remarkable effect on performance levels and it should be considered in seismic design process. To consider the soil types effects, it is recommended to compare the results of analysis achieved in this study to find out the percentage of variations, and use them as a reference for seismic design process. In addition, it is possible to have modification factors for amending the performance levels.

Keywords

• soil effects
• incremental dynamic analyses
• seismic performance levels
• steel structure.