Saturday, 24 October 2015

Design of combine Trapezoidal footing

A combined footing supports the load of two or more adjacent columns. Such a footing is provided under the following circumstances:

1) When the columns are very near to each other so that there footing overlap.
2) When the bearing capacity of soil is less, requiring more area under individual footing.

3) When the end column is near a property line so that its foting cannot be spread in that direction.
A combine footing may be rectangular or trapezoidal in plan. The aim is to get uniform pressure distribution under the footing. for this the CG of footing are should coincide with the CG of the combine loads of the two columns. There are four types of combine footing commonly used.
1) Combine rectangular footing
2) Combine trapezoidal footing
3) Strap beam footing
4) Raft footing.

This numerical is of combine trapezoidal footing must watch and download pdf to better understand.

 
 
 
 
 
 
                                                                                                                                 
 
 
 
 
 
 
 
 
 
 
 

Friday, 9 October 2015

Clapeyron's three moment theorem by parag pal Part-2

                               
This video is all about Clapeyron's three moment theorem. In this video the detail solution is given by mi that how to solve the TMT. This type of nums important to analysis the beam.

Clapeyron's three moment theorem by parag pal Part-1


This video is all about Clapeyron's three moment theorem. In this video the detail solution is given by mi that how to solve the TMT. This type of nums important to analysis the beam.

Fixed beam by three moment thm


This video is all about Clapeyron's three moment theorem. In this video the detail solution is given by mi that how to solve the TMT. This type of nums important to analysis the beam.

Non sway portal frame analysis by Kani's method


Kanis method is important to analysis the portal frame as well as the beam. In this method the more number of interations are important. The kanis method having sway and non-sway portal frame which comes in some little difference that is the story moment. Solve the nums by this method as I listed in video. ENJOY

Sway analysis by Kani's method


Moment distribution method


Design of simply supported beam


Analysis of beam by Staddpro


Analysis of portal frame by Staddpro


Analysis of frame structure by Staddpro


Design of rcc building by staddpro


Analysis of steel truss by staddpro


Design of steel truss by staddpro


Design of simply supported beam


Design of one way slab


Design of T-beam


Singly reinforced beam by Limit state method


Friday, 2 October 2015

Permanent way

 A permanent way is the combination of rails, sleepers, ballasts, fixtures and fastenings, etc.

This term is used to distinguish the finished and permanent track from a temporary track which is laid for temporary work, i.e. for transporting construction material etc on major construction sites.

 such a temporary track is removed as soon as the construction completed. the purpose of use of a permanent way is to provide the permanent facility for safety and quick movement of normal  commercial  traffic between the starting and destination stations. permanent way costs nearly 40% of the total investment to the railways.

Requirements of  Ideal  permanent   way:-

 

1. The alignment of the should be correct.

2. The track should process sufficient elasticity. It should also possess sufficient lateral rigidity and stiffness so that it may withstand the lateral thrust and centrifugal forces.

3. The track should be designed that load of the train should be distribute uniformly over it.

4. The gauge of track should be correct and uniform.

5. The track should possess high resistance to damage at the time of derailment and its maintenance cost is minimum.

6. In straight reaches, the rail level should be same while on curves, proper super elevation should be provided.

7. The friction between the wheels of rolling stock and rail should be minimum.

8.The gradient should be uniform joints, point and crossings should be designed and maintained properly.

9.Facilities of repair, replacement etc of damage portion of track should be adequate.