International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 06 Issue: 07 | July 2019 www.irjet.net p-ISSN: 2395-0072 © 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 1920 Comparative Analysis of RCC Structure and Tube-In-Tube Structure Swetha Singh 1 , Nandeshwar Lata 2 , Dr. Bharat Nagar 3 , Rajesh Kumar⁴ 1 Swetha Singh, M-Tech Research Scholar, Department of Civil Engineering, Jagannath University, Jaipur, Rajasthan 2 Nandeshwar Lata, Assistant Professor, Department of Civil Engineering, JNIT, Jaipur, Rajasthan 3 Dr.Bharat Nagar, Professor & Head of Department of Civil Engineering, Jagannath University, Jaipur, Rajasthan ⁴Rajesh Kumar, Freelancer Faculty for Civil Engineering in Engineers Academy ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - The study is based on the comparative analysis of rcc structure and tube-in-tube structure, and the primary objectives are to investigate effects of varying design parameters on the tube action and shear lag behavior of a typical reinforced concrete tube in tube building, and compare this tube-in-tube structure with traditional rcc buildings. A parametric study was conducted with necessary design variables on the performance of a 20 story building using softwares namely STAAD.Pro and ETABS. The design variables considered for the parametric study include the column depth, spandrel beam depth and shear wall thickness. The performance of each model was assessed in terms of overall and critical story drifts, and shear lag behavior using linear dynamic analysis. Overall, the effects of the column depth on the tube action and shear lag behaviour were more prominent than the other member dimensions. The reduction in the percentage of steel and also the concrete amount can be seen as compared to the regular rcc structure. Key Words: shear lag behaviour, STAAD.Pro, ETABS, spandrel beam depth, story drift, linear dynamic analysis 1. INTRODUCTION The advancement in construction field is increased day by day. The numbers of buildings, height of building are increased. The effect of lateral load is increased with respect to the increase of height. Modern construction methods and structural systems are to be introduced to enhance the structural safety. There are different types of structural systems which are to be used to resist the effect of lateral loads on the buildings. Rigid frame structures, braced frame structures, shear wall frame structures, outrigger systems, tubular structures are the different types of structural systems used in the buildings to enhance structural safety by reduce the effect of lateral loads on the buildings. The tubular systems are widely used and considered as a better structural system for tall buildings. There are different types of tubular structural systems which are given as framed tube, braced tube, bundled tube, tube in tube, and tube mega frame structures. 1.1 Motivation and Objective While constructing tall buildings we have to consider some extra safety measurements like structure should be designed for seismic and wind considerations, type of foundations adopted to structure, life of the structures. The tall buildings are more affected to lateral loads, to withstand the loads we have to consider the parameters for the building. This study consists the tubular concept which will give more spacing for accessible and which is more resistant to the lateral loads. By using this form of structures we can go for high rise structures. The objectives are: 1. Comparative analysis between tube in tube structure and RCC structure. 2. To study the behavior of the RCC structure and tubular structure in seismic conditions. 3. Results are compared between the models with respect to Base shear, Displacement and Drift. 1.2 Advantages of Tube-in-tube structure over RCC structures:  Efficient structural system: The tube-in-tube structure with central tube provides stability against lateral loading as well as gravity loading. Also this system provides enough opening for stairways, elevators and ducts etc.  It is suitable for high rise structure: This system holds good for 40-100 storied structure.  The use of tube-in-tube structure allows speedy construction.  It is suitable for RC, steel and composite constructions. 2. CLASSFICATION OF STRUCTURAL SYSTEMS There are many structural systems such as: 1. Rigid frame System (Moment Resisting Frame System) 2. Braced frame System 3. Shear-walled frame System 4. Coupled Wall System 5. Advanced Structural forms- Tubular Systems The tubular system is to arrange the structural elements in such a way that the system can resist the imposed loads on the structure efficiently especially the lateral loads. This system comprises of various elements i.e. slabs, beams,