DESIGN AND ANALYSIS OF G+6 RESIDENTIAL RCC BUILDING

WHAT IS IT ?Residence is one of the important needs of the present world.To meet with this fast growing demand, new forms of grouped living called Apartments are being constructed Construction depends majorly on analyzing and designing of structures. With huge development in technology we are having scope to use softwares like STAAD enables us to cut off huge amount of manual work and time to achieve greater accuracy in analyzing and designing of economical and safe structures

3-D MODEL OF STRUCTURE

IS THE STRUCTURE SAFE ?

ANALYSATION OF STRUCTURE :

Loadings Supports Materials Sectional Properties

LOADS ACTING ON STRUCTURE

TYPES OF LOADING:

Dead Loads Live Loads

Earthquake loads Wind loads Combinations

NORMAL LOADINGSNormal loads consists of Dead and Live loads on the structure. Dead loads IS 1875 PART I Includes self weights of all the members of the structure .Live loads IS 1875 PART II Includes live loads on the structure. It can be taken as 2KN/m for residential buildings.

SPECIAL LOADINGS :

EARTHQUAKE LOADS IS 1893 Loads assumed as lumped loadings.Floor by floor base shear stresses on columns are calculated by using assumed lumped loads.Seismic Shear stress distribution is done floor by floor Building designed according to the seismic shear developed.

SPECIAL LOADINGS :

WIND LOADS IS 1875 PART III Mainly depends on Angle of attack of the wind, Terrain, Topography.. Vz=Vb k1 k2 k3 k1 = Risk coefficient k2 = Terrain factor k3 = Topography factor

SPECIAL LOADINGS :

Pz = 0.6 (Vz )2 Pz = Total Pressure Fz = Ct x A x Pz x GFz = Total Factor Ct = Force Coefficient G = Gust factor Structure is designed for the total force at each floor.

LOAD DISTRIBUTION ON SLAB

WHY DO WE DESIGN ??

Manually the structure is usually designed by calculating bending moments and shear forces. Provide steel required to balance the deflection under guidelines of IS 456 Hand book SP 24 is explanatory notes Detailing is done by using SP 34. Designing is done according to code only.

BENDING MOMENT AND SHEARFORCES OF STRUCTURE

BEAMS AND COLOUMNS

Calculate bending moment. Provide tensional reinforcement as either singly or doubly reinforced depending on requirement. For columns in specific SP 16 is used. For beams and columns shear reinforcement is provided according to code Columns must be designed by considering uni or bi axial moments

SLAB Decide whether it is one way or two way slab. It can be decided by using the ratio of longer to the shorter span. If ratio is

FOOTINGS Calculate the area required to distribute the loadings on the column depending on soil bearing capacity. Use unfactored load in calculating area of footing and factored load in fixing the depth of the footing Bearing stress is maintained safe depending on area of the footing See the footing is safe enough in one way or two way shear which is due to soil reaction pressure. Depth must be adjusted if shear is unsafe.

STAIRCASE :

Fix the tread and rise depending on the requirements. Next calculate the waist slab thickness which is to be provided. Loads are calculated and assumed as uniformly distributed on a simply supported beam according to IS 456, clause 33.2 Bending moment is calculated and steel is designed. Spans and steps are fixed according to code.

CONCLUSION AND REFERENCES

Overall, though we discussed manual methods of calculating every component of the residential building we use STAAD for knowing the area of steel and design columns, beams accordingly. Footings, Slabs, Staircases must be designed completely in manual calculations. Design must be strictly under the guidelines of Codes and Hand books