Week 4 Challenge
Aim: - To calculate the load applied on abutment (Retaining structure) and analysis it using Staad-Pro.
Explanation:- Abutments (Retaining structures) are the most important sub structures which act as a support for bridge deck as well as it retain the earthwork on it. So considering this it is very important to analysis and design the abutments carefully there by it serves the purpose most effectively and will provide a state of equilibrium to the bridge.
Calcualation:-
- Active earth pressure at toe side:-
- assume the value of saturated density of soil mass is 22 kN/m3
- σ1= 0.32(22-9.81)*3
- σ1= 11.7024kN/m2-------------------------------------(1)
- Active earth pressure at heel side:-
- σ2=Active pressure due to submerged soil+ Active pressure due to dry soil
- Asumme dry density of soil is 18kN/m3
- σ2= 0.32(22-9.81)*3 + 0.32*18*4
- σ2= 23.04kN/m2---------------------------------------(2)
- Vertical pressure on footing
- At toe:-
- σv1=(22-9.81)*3=36kN/m2----------------------------(3)
- At Heel:-
- σv2=(18*7)=126kN/m2---------------------------------(4)
Staad-Pro Modelling:-
Results:-
