Week 6 Challenge

Partial safety factors for verification of structural strength (ULS) are considered as per Table 3.2 of IRC:6 - 2014.

The anaysis is carried out using staad pro and a critical case from analysis result adopted for design.

Dead Load Bending moment

Shear force

Displacement

BM for earth pressure

Shear

Displacement

LIVE LOAD SURCHARGE

Left BM

rIGHT

bBM both side

1Shear for Both side LL surcharge

BM diagrame for 70R tracked vehicle on mid span

Shear force for 70R Tracked on edge

Shear diagramme

Q2 Design of the member based the analysis

Dimensions of the section are already given. Tempreture load assumed. live load of 40T Bogie and Class AA also considered.

Provision of reinforcement and checking adequacy of streses in the concrete and reinforcing steel is the task or challange.

For this Bending moment and shear force envelopes are obtained by using ULS, SLS Rare, SLS RARE WITH TEMPRETURE ACCOMPANING, SLS RARE WITH TEMPRETURE LEADING, SLS QUASI PERMANENT, SLS QUASI PERMANENT WITH TEMP ACCOMP., SLS QUASI PERMANENT WITH TEMP LEADING with partial factor. Live load combination separately applied separately without partial factor.

Following summary chart are for different members for corresponding CRITICAL bending moment and shear force obtained.

Check % of steel

Check for shear

Q 3 Reinforcement detailing

Q 4 Change in shear earth fill 5m

Dead Load (Fill on top slab) (surfacing)

Load (UDL) on top slab 5m X 20kN/m3 = 100kN/m

Thickness of W.C. + profile correction course = 68mm

Load (UDL) on top slab 68 X 25 /1000 = 1.7kN/m

Total SIDL load on top slab = 101.7kN/m

After analysing the design shear force is taken