static ananlysis and design of g+ 20 rcc framed structure by using e tabs software by vaidehi
- 1. PRESENTED BY VAIDEHI V STATIC ANALYSIS AND DESIGN OF G+20 RCC FRAMED STRUCTURES BY USING ETABS SOFTWARE
- 2. ABSTRACT Practical knowledge is an important and essential skill required by every engineer. For obtaining this skill, an apartment building is analyzed and designed, seismic zone II with (G+20) stories having a car parking facility provided at basement floor. The building has a shear wall around the lift pit. The modelling and analysis of the structure is done by using ETABS and the designing was done. Design of slab, stair case are done manually. The design methods involve load calculations manually and analyzing the whole structure by ETABS. The design methods used in ETABS are limit state design confirming to IS code of practice. From analysis, the parameters like storey displacement, storey drift, base shear and story shear, bending moments are determined and also comparative study is done for both the methods. Keywords: RCC Buildings, seismic zone II, storey displacement, storey drift, Base shear, axial forces, bending moments.
- 3. INTRODUCTION It is not an easy task to build a beautiful and strong building which can withstand against harshed conditions. We all know that today technology has achieved milestones in every field, and that's why even civil engineering needs to be upgraded. This has led to several changes in how civil engineers work and perform. Not just the use of technology has made lives way easier but has also because of the development of some really helpful software, encouraged civil engineers to give their best. “etabs-extended 3d analysis of building systems”, is a engineering software. It is an engineering software that is used in construction and planning and designing of buildings. It has provided a very different options and opportunities to make structures efficiently and in less time with full safety. It is loaded with an integrated system consisting of modeling tools, code-based load analysis, solution to the problems techniques. It can handle the complex and big building models and associated requirements. Etabs software is widely in use nowadays for construction of buildings.
- 4. MULTISTOREY BUILDING A multi-story building is a structure that upholds at least two stories over the ground. There is no formal restriction on the height of such a building or the number of floors a multi-story building may contain, though taller buildings do face more practical difficulties. But, from a structural engineer's point of view the tall building or multistoried building can be defined as one that, by virtue of its height, is affected by lateral forces due to wind or earthquake or both to an extent that they play an important role in the structural design. Tall structures have fascinated mankind from the beginning of civilization. The Egyptian Pyramids, one among the seven marvels of world, built in 2600 B.C. are among such antiquated tall designs. Such designs were built for protection and to show pride of the populace in their civilization. The development in present day multistoried structure development, which started in late nineteenth 100 years, is expected to a great extent for business and private purposes.
- 5. The development of the high-rise building has followed the growth of the city closely. The process of urbanization, that started with the age of industrialization, is still in progress in developing countries like India. Industrialization causes migration of people to urban centers where job opportunities are significant. The land available for buildings to accommodate this migration is becoming scarce, resulting in rapid increase in the cost of land. Thus, developers have looked up the sky to make profits. The result is multistoried buildings, as they provide a large floor area in a relatively small area of land in urban centers.
- 6. ABOUT ETABS ETABS is an engineering software product that caters to multistory building analysis and design. Displaying apparatuses and formats, code-based load remedies, examination strategies and arrangement procedures, all direction with the lattice like calculation novel to this class of design. Fundamental or high-level frameworks under static or dynamic circumstances might be assessed utilizing ETABS. For a refined appraisal of seismic execution, modular and direct- coordination time-history investigations might couple with P-Delta and Large Displacement impacts Nonlinear connections and concentrated PMM or fiber pivots might catch material nonlinearity under monotonic or hysteretic conduct. Instinctive and coordinated highlights make uses of any intricacy functional to carry out. Interoperability with a progression of plan and documentation stages makes ETABS an organized and useful instrument for plans which range from straightforward 2D casings to expand present day tall structures.
- 7. IMPORTANCE OF SEISMIC ANALYSIS Seismic study is a very important study. It helps in understanding the behavior of structures of various types subjected to earthquake loads, and how we can protect the inhabitants of that structure in the event of an earthquake. Seismic concentrate additionally assists with understanding the different kinds of seismic waves that start, assisting us with planning the zones of continuous quakes and stable zones. The study of seismic activity of a particular zone helps in establishing minimum standards of safety for that zone, making life easier to continue post-earthquake.
- 8. AIM AND OBJECTIVE The objectives are as listed below: The objective is to design the G+20 building (structural system) by using ETABS To prepare a 3D model of a multi-storey RCC building using ETABS software. Analyze building for seismic analysis and Dead load, Live load and Earthquake load using static method and dynamic method structure. Comparison of static and dynamic methods, displacement, story drift, base shear To design the building against the effect of seismic forces or to make the structure earthquake resistant. To get the knowledge and to design the structural elements like beams, columns, slabs
- 9. DESIGN PHILOSOPHY A. Structure Details And Materials 1) Type of Structure Building = G+20 Residential 2) Depth of foundation = 2m Below GL. 3) Depth of plinth =1.5 m 4) Floor to floor height = 3.m 5) Seismic Zone = II Zone 6) Importance Factor= 1 7) Response Reduction Factor = 5
- 10. 8) Soil Type = Medium Type II 9) Live load = 3 KN /M2 10) Thickness of wall = 300mm and 150mm 11) Column size = 300 x 500mm 12) Beam size = 300 x 450mm 13) Grade of concrete M35 , grade of steel fe 415 14) Safe bearing capacity 300 kn/m2 15) Slab =250 mm , Shear Wall = 250mm 16) AAC blocks having unit weight 6 kn/m2
- 11. B. Load and Details 1) Internal wall under primary beam = 5.4 kN / m 2) External wall under primary beam =5.61 kN / m 3) Parapet wall = 5.61 kn / m 4) Super impose load on floor = 4 KN/m² 5) Live load = 3 kN / m² 6) Live load on terrace and head room = 1.5 kN / m² 7) Earthquake load = as per 1993 part 1 2016 8) Wind loads auto select in etabs
- 12. CONCLUSION 1.This project has given an opportunity to re-collect and co-ordinate the various methods of designing and engineering principles which we have learnt in our earlier classes. 2) E tabs is based on limit state method 3) The forces and support reaction are minimum as the response factor is taken zone 2 4)Design was done by successfully verified manually as per IS 456-2000
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