Week 5 Challenge

Aim:- To calculate the applied wind load on the bridge using IS-875-Part-3-2015.

Explanation: - As the bridges are located in different zones of the world wind pressure act on them accordingly. So seeing this every country have developed there own codal provision analyzing the magnitude, intensity and direction of the wind. In this task, the wind pressure is analyzed using IS-875 Part-3 2015 and the wind load on the bridge is applied accordingly.

Calculation:-

From IS875-Part-3 2015 Fig1 basic wind speed in m/s

As the bridge is located in Mumbai Vb= 39m/s---------------------------------(1)

From table 1-clause 6.3.1 page no.9 IS-875-Part-3 2015

K1= 1.06--------------------------------------------------------------------------(2)

From table 2-clause 6.3.2.2 page no.10 IS-875-Part-3 2015

K2= 1-------------------------------------------------------------------------------(3)

From Annex C clause 6.3.3.1 page no.9 IS-875-Part-3 2015

K3= 1-------------------------------------------------------------------------------(4)

From clause 6.3.4 page no.10 IS-875-Part-3 2015

K4= 1.30----------------------------------------------------------------------------(5)

Vz= Vb*k1*k2*k3*k4

Vz= 39*1.06*1*1*1.3

Vz= 53.742 m/s--------------------------------------------------------------------(A)

Pz= 0.67Vz^2

Pz= 0.67*53.742*53.742

Pz=1.935kN/m2--------------------------------------------------------------------(B)

Staad-pro modelling:-

Results and discussions:-