Challenge

Challenge 5

DDhiraj Satghare5 Oct 2022

Aim:- Prepare and analyze a transverse model of the Deck slab with the following specifications.

Given Data:-

Slab laid on top of 4 I-girders.
Having supports spaced at 2.0m each.
Having the following geometrical properties

Thickness of slab = 0.240m

Width of slab = 1.0m

Procedure:-

Step (1) - Creating Grid Modeling in STAAD.Pro.

Creating node (0,0,0) -> Create another node using coordinate X ( 1.250,3.250,3.250,7.250,8.50)

Now Add Beam using the beam tab.

Step (2):- Assigning Support

Specification -> Support -> Create -> Pinned -> Add -> Select support 2 -> Select node -> Assign to selected nodes -> Assign.

Step (3):- Assign Property to Model.

Specification -> Property -> Define -> Rectangle -> YD:0.24, ZD:1 -> Add -> Select the property -> Select the beam -> Assign to selected beam -> Assign.

3D Model

Step (4):- Applying Loading on Model

I. Dead Load.

Loading -> Load & Defination -> Load Case Detail -> Tital ( Dead Load ) -> Add -> Select Dead Load -> Add -> Self Weight Factor -1 -> Add -> Select Selfweight - 1 -> Assign to view -> Assign.

II. Edge Load.

Loading -> Load & Definition -> Load Case Detail -> Title ( Edge Load) -> Add -> Select Edge Load -> Add -> Nodal Load -> Node -> Fy: -24 -> Add -> Select Load -> Selclect Node -> Assignto selected Node --> Assign

For the moment Mz: 12 and for another side Mz: -12.

III. Plinth Load.

Loading -> Load & Definition -> Load Case Detail -> Title ( Plinth Load ) -> Add -> Select Plinth Load -> Add -> Member Load -> Uniform force (W: -7 , d1:0.75 , d2:1.25, GY) -> Add -> Select Load -> Select Suitable beam -> Assign to selected beam -> Assign.

For Different member beams according to suitable loads

Uniform force (W: -7 , d1:0 , d2:0.5, GY)

Uniform force (W: -7 , d1:1.5 , d2:2, GY)

IV. Live Load (A).

Loading -> Load & Definition -> Load Case Detail -> Title ( Live Load A ) -> Add -> Select Live Load A -> Add -> Member Load -> Uniform force (W: -80 , d1:0.75 , d2:1.25, GY) -> Add -> Select Load -> Select Suitable beam -> Assign to selected beam -> Assign.

For Different member beams according to suitable loads

Uniform force (W: -80 , d1:0 , d2:0.5, GY)

Uniform force (W: -80 , d1:1.5 , d2:2, GY).

V. Live Load (B).

Loading -> Load & Definition -> Load Case Detail -> Title ( Live Load B ) -> Add -> Select Live Load B -> Add -> Member Load -> Uniform force (W: -80 , d1:0.75 , d2:1.25, GY) -> Add -> Select Load -> Select Suitable beam -> Assign to selected beam -> Assign.

For Different member beams according to suitable loads

Uniform force (W: -80 , d1:0 , d2:0.5, GY)

Uniform force (W: -80 , d1:1.5 , d2:2, GY).

VI. Live Load (A + B).

Loading -> Load & Definition -> Load Case Detail -> Title ( Live Load A + B ) -> Add -> Select Live Load A + B -> Add -> Member Load -> Uniform force (W: -80 , d1:0.75 , d2:1.25, GY) -> Add -> Select Load -> Select Suitable beam -> Assign to selected beam -> Assign.

For Different member beams according to suitable loads

Uniform force (W: -80 , d1:0 , d2:0.5, GY)

Uniform force (W: -80 , d1:1.5 , d2:2, GY)

VII. SLS Load Combination.

Loading -> Load & Definition -> Load Case Detail -> Define combination -> Create title as SLS Case 1 -> Select Load -> Insert Factor -> Add.

According to Loads create 4 Types of the case in SLS condition.
All the Load factor is referred from Table 12 IRS CBC code.
Impact factor is first calculated then add with Live Load factor which is given in the code.