It has been found that the forces in the members of frame structures considering soil-structureinteraction, differs than conventional method of analysis. Analysis considering soil-structure interaction is time-consuming process; hence, if the relation between two methods established, then by using conventional method, realistic results can be obtained. In the present work, effort has been made to study the impact of soil-structure interaction on the progressive collapse assessment of reinforced concrete frame structure (building). It is clear that the differential settlement of the foundation changes the load transfer system of the super structure. Differential settlement depends on the properties of the soil below foundation and the stiffness of the super structure. The objective of this study is to quantify the change in the reaction at the foundation level due to soil structure interaction. To achieve this target, the Winkler approach is used. In this model, soil below foundation is modelled as idealized springs. To study the effect of failure of load carrying elements i.e. columns on the entire structure; 15 storey moment resistant RC buildings is considered. The building is modelled and analyzed for progressive collapse using the structural analysis and design software SAP2000. Nonlinear static analysis is performed to understand the progressive collapse phenomena. The nonlinear static analysis is found to be the most efficient method for progressive collapse assessment of the reinforced concrete structure with consideration of soil effect. General Service Administration (GSA 2003) guideline is used for loading and procedure to assess the potential towards progressive collapse of structure.
Progressive Collapse Assessment of Reinforced Concrete Frame Structure with and without Considering Actual Soil Condition
