Week 2 Challenge
Aim: To apply the IRC live loads and model in Staad pro and perform the structural analysis.
Given data:
Width of the bridge= 7m
Span of bridge=24m
Pier diameter= 2m
Wind load= 42km/hr
Unit weight of soil= 18kN/m3
Location of bridge in seismic zone III
Theory:
Live load: The live load on the bridge, is moving load on the bridge throughout its length. The moving loads are vehicles, Pedestrians etc. but it is difficult to select one vehicle or a group of vehicles to design a safe bridge. So, IRC recommended some imaginary vehicles as live loads which will give safe results against the any type of vehicle moving on the bridge.
Type of loading
- IRC class AA loading
- IRC class A loading
- IRC class 70R loading
- Footway loading
Width of carriageway is 7m(5.3m<7m<9.6m) it is design for two lane and live loading are apply will be two class A loading or one class 70R(w) loading.
Calculation:
No. of load generation= (span length + Total distance of vehicle)/Length of per increment.
No. of load generation = (24+19)/1=43
Draw two node with distance of 12m
Draw a circular pier with dia. 0f 2m
Draw all cross-sectional pier
Draw all longitudinal pier and crass girder
Draw all longitudinal T girder with dimension of height 1.9m thinness 0.5m
Draw in foundation plate mat
Insert fixed support in plate mat
Draw plate with thickness of 200mm for deck slab
Apply live load in Y direction increment in X direction with 43 load generation.
|
Distance |
1.1 |
3.2 |
1.2 |
4.3 |
3 |
3 |
3 |
|
|
Load(kN) |
27 |
27 |
114 |
114 |
68 |
68 |
68 |
68 |
After live load apply the go for Run analysis
Result:
Load generation 21 and his Displacement
Load generation 21 and his reaction
Load generation 21 and his beam result
Load generation 21 and his plate result
