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SOIL-STRUCTURE INTERACTION OF REINFORCED CONCRETE FRAME BUILDING - VERIFICATION OF MEASURED CONCACT STRESS WITH THE NUMERICAL ANALYSIS RESULTS
Abstract
The article deals with numerical analysis of vertical normal contact stress in subsoil of foundation slab of 16-storey monolithic reinforced concrete frame building situated in Kiev, Ukraine. The foundation gap is located 11.65 m below the level of surrounding terrain. Numerical calculations are verified with real measured values of contact stress (published in Lazebnik, 1998) in four different cross sections of foundation slab. The problem is solved as spatial (3D) with complex interaction of пїЅupper structure пїЅ foundation пїЅ subsoilпїЅ system. Primary numerical model considers rigid connection between soil and concrete within the foundation gap and subsoil is modeled with respect to the theoretical background of linear elastic half-space. Advanced non-linear calculations are realized on models with elastic-plastic (Mohr-Coulomb) constitutive model of subsoil and non-continuous foundation gap with application of plane interface elements. Interface elements with three different modules of normal stiffness are considered. Numerical calculations are processed in finite element geotechnical software Midas GTSпїЅ.
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