Improving lateral deformation behavior of high rise steel structures under dynamic loadings

The present study assesses the effect of dynamic load on steel building for different type of bracing. There are exist many researches on the effect of earthquake dynamic load on the rectangular buildings and a few or limited studies discuss the effects on circular buildings. Our study will treat high rise steel rectangular and circular buildings 10, 20 and 30 stories under dynamic load represented by the response spectrum model, and searching for the best bracing performance to resist the deformation in structural parts. For bracing in this study, we use the concentrically bracing and the eccentrically bracing types in different locations to find and search the best performance of it. The structural models will be subjected to a certain level of earthquake conditions depend on TEC 2007. The finite element models were built using SAP 2000 program in this study. Comparisons of the results showing that type and location of bracing lead to different performances for buildings under lateral loads. Understanding the underlying mechanics of this behavior will help engineers to consider more effective ways to design seismic resistant high rise steel buildings.