CALCULATION OF EARTH QUAKE LOADS

CALCULATION OF  EARTH QUAKE LOADS

1.SEISMIC  COEFFICIENT  METHOD:

Thickness of slab=110mm

Assume size of beam=230×500mm

Assume column size=300×300

Wall  Thickness=230mm

Storey height=4KN/m

2.WEIGHT OF ONE STOREY:

Weight  of  beam =0.23×0.5×13.150×14.420

                                    =21.806KN

Weight  of  Column=(3.2×0.3×0.3×13.150×4)

                                     =15.14KN

Weight of brickwork=(14.420×3.2)-((1.5×3.2)-(1.5×2.1)-(1×1) ×19

                                    =821.146KN

Weight of Slab            =(14.420×6.230) ×0.11×25

                                =   247.05KN

Live Load                   =(14.420×4) ×2

                                    =115.36 KN

Weight of one storey=1220KN

Total Weight Of Building=2440KN

The Proposed Building is situated at Coimbatore

Seismic Zone –lll

Zone Factor Z  =0.16

Sa/g For Soil From Table 3 of BIS -2002-2.5

Damping Of RCC Building =3%

Importance Factor=1

3.TIME  PERIOD  CALCULATION:

Time period=0.09h/√d

Time period=0.09× 6.4/√14.420

                    =0.1516

4.DESIGN OF HORIZONTAL SEISMIC EFFICIENT:

Ah=(Z/2) (Sa/g)/(R/T)

Ah=(0.16/2) (2.5) (3.1)=0.0666

5.DESIGN OF BASE SHEAR

V_b= Ah X_w

Vb=0.666×2440= 1625K       N

Distribution of Basic shear along the height of the building

Q_i =Vb (w_ih_i²/€ w_ih_i²)

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I am Thomas Britto here to share my experiences in the civil engineering field to all my readers.Today many students are struggling to buy books at high prices. So I decided to start a blog and share my experience and knowledge with all my readers.

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