Week 1 Challenge
Objective:
To calculate the loads and apply them in Staad pro and perform structural analysis.
Inputs available:
Width of bridge deck=10.2m,
Span of bridge=12m,
Pier size=2.5m dia,
Seismic zone=IV,
Wind speed=47 km/hr,
Unit weight of soil=19 kN/m^3.
Also, the site is within a 60 km radius of the Bay of Bengal.
Inputs assumed:
Deck slab thick=250mm,
Parapet wall, height=1m, and thick=300mm,
Unit weight of RCC=25 kN/m^3,
Unit weight of PCC=24 kN/m^3,
Unit weight of Rebar=78.5 kN/m^3,
Unit weight of brick=22 kN/m^3,
Unit weight of finishes=24 kN/m^3.
Dead Load calculation:
Self-weight of Deck slab=(width x thick x unit weight)
=(10.2 x 0.25 x 25) = (6.75 kN/m)
Self-weight of parapet wall=(height x thick x unit weight)
=(1 x 0.3 x 25) = (7.5 kN/m)
No. of parapet wall=2
Self-weight of Box Girder:
=(112.475 kN/m)
| S.NO. | LENGTH (m) | THICK/DEPTH (m) | AREA (m^2) | UNIT WEIGHT (kN/m^3) | TOTAL WEIGHT (kN/m) |
| 1 | 1.5 | 0.225 | 0.3375 | 25 | 8.4375 |
| 2 | 1.5 | 0.35 | 0.525 | 25 | 13.125 |
| 3 | 4.2 | 0.225 | 0.945 | 25 | 23.625 |
| 4 | 1.5 | 0.35 | 0.525 | 25 | 13.125 |
| 5 | 1.5 | 0.225 | 0.3375 | 25 | 8.4375 |
| 6 | 2.05 | 0.25 | 0.5125 | 25 | 12.8125 |
| 7 | 2.05 | 0.25 | 0.5125 | 25 | 12.8125 |
| 8 | 4.02 | 0.2 | 0.804 | 25 | 20.1 |
| TOTAL | 112.475 |