Abstract
The perceiving local site effects on strong ground motion are particularly important for the mitigation of earthquake disasters as well as future earthquake resistant design. The primary objective of this study is to investigate seismic behavior of building tube structure system with respect to dense soil-structure interaction (sand dense and very hard clay soil with a thickness greater than 30 m). For this purpose, the studied building in this paper is placed over two other different modeled soil types and results of seismic behavior of building for three soil types are compared with each other. Through response spectrum analyses, influence of different sub-soils (dense and loose soil) was determined on seismic behavior of 40-storey building reinforced concrete (RC) with tube in tube structure system and performance of each model was assessed in terms of shear lag behavior, overall and critical (maximum) story drifts. Results illustrate that loose soils amplify seismic waves and increase building drifts and shear lag behavior.
Highlights
Recent improvements in seismological source modeling, analysis of travel path effects, and characterization of local site effects on strong vibration have led to significant advances in both code-based and more advanced procedures for evaluating seismic demand for structural design
Different aspects of seismic soil-structure interaction analysis are investigated by different researchers which are available in the literature including studies of [11] and [12]
As you can see in figure, building that is located over sand dense and very hard clay with a thickness greater than 30 m shows least columns axial force and have situated nearest to the ideal state as well as building over sand dense and very hard clay with a thickness greater than 30m shows approximately 50% reduction corner column axial force proportional to building over the assumed soft soil with high humidity due to high surface groundwater and 30% reduction corner column axial force proportional to building over soil with average density, clay with average hardness and shattered stone by weathering at the first, tenth and twentieth floors
Summary
Recent improvements in seismological source modeling, analysis of travel path effects, and characterization of local site effects on strong vibration have led to significant advances in both code-based and more advanced procedures for evaluating seismic demand for structural design. (2015) Evaluation of Seismic Behavior in Building Tube Structures System with Respect to Dense Soil-Structure Interaction Effect. There are numerous studies which have shown correlation between damage and local geology and site condition [3]-[5]. Many researchers studied seismic analysis on soil-structure interaction for different types of structures including bridges, minarets, etc. Different aspects of seismic soil-structure interaction analysis are investigated by different researchers which are available in the literature including studies of [11] and [12]. A building framed-tube system is considered one of the most efficient lateral force-resisting systems. This system utilizes closely spaced perimeter columns tied to each other with spandrel beams, often in combination with additional bracing components (e.g., outriggers or belt walls). ETABS (v9.2.0; [15]) program has been used for simulation of the whole project including the local soil and the building structure
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