Comparative Analysis of High-Rise Structure with Diagrid Lateral Load-Resisting System with Composite Members and Base Isolation

Abstract

Due to the dense population and lack of land for building developments, high-rise structures and flats are becoming increasingly important in metropolitan and sub-urban regions. The design and construction of tall structures should be efficacious, such that it should be adept at resisting the detrimental effect of earthquake and wind forces. As a result, composite construction is utilized, which combines the benefits of two materials, namely concrete and lightweight steel, and is used in both buildings and bridges with long spans. Bonding and friction between steel and composite structures withstand external loading in composite columns. Rigid MRF frame, RCC shear wall, RCC wall frame, braced tubular system, outrigger structural system, and steel tubular system are some lateral loads resisting structural solutions for high-rise structures. Because of its structural proficiency and versatility in space and esthetic planning, the diagonal grid structural system has recently been utilized in tall structures. One of the most recent methods utilized in construction to resist seismic waves induced by earthquakes is base separation or isolation design. The practice of base separation has been utilized to safeguard constructions from the devastating consequences of seismic forces. The positioning of isolators at the footing level improves the structural flexibility of the building. In this paper, behavior of composite column structure with the use of a diagrid structural framework as a lateral load withstanding system and base isolation technique was analyzed. The outcomes from the software analysis were collected in terms of shear force at each story level, story level displacement, total shear at the base and fundamental time period, etc., and analysis results were compared from all the models. After doing the analysis, it was concluded that including composite sections as diagrid members improves the rigidity of the structure, but the structure has to design for higher base shear. Base isolation is a very effective seismic response control system and improves the performance of a diagrid structural system under seismic loading.