New York, NY IMG HI 58° LO 56° Home About Contact
IMG-LOGO
Home Engineering Mechanics Electrical Machines To determine support reaction of a Simply Supported Beam and draw shear force diagram
Electrical Machines Lab Experiments

To determine support reaction of a Simply Supported Beam and draw shear force diagram



Aim

To determine support reaction of a Simply Supported Beam and draw shear force diagram.

Theory:

Shear force is the algebraic sum of all vertical forces either on left hand or right hand of section.

equation

The aim of the experiment is to find support reaction of a given truss (in the present case it is warren type) and verify analytically considering it simply supported. The truss is loaded at three joints and supported on a frame through spring balances at two joints. The readings on the spring balance show the amount of force on the support.

Apparatus Used:

  1. Parallel beam apparatus.
  2. Measuring scale
  3. Sets of weights
  4. Sprit level

Procedure:

  1. Measure the length of the beam and note down the balance readings for no load.
  2. Apply loads at various points on the beam and measure its distance from support.
  3. Note down the readings of balance.
  4. Repeat the above steps with changing loads for at least five sets.
  5. Compare the experimental values with the analytical values.

Observations and Calculations:

S.no Applied Loads/W1/W2/W3 Distance of Load from end/x1/x2/x3 Final reading of spring balance S”A/S”B Experimental Reaction R’A =S”A –SA Analytical Reaction RA % error in RA RA-R'A/RA X100 Experimental Reaction R’B =S”B –SB Analytical Reaction RB % error in RB-R'B/RB X100
1
2
3
4
5
6

Result:

  1. For ____ sets of observations, the observed percentage error in RA is____________________
  2. For ____ sets of observations, the observed percentage error in RB is____________________

Precautions:

  1. Level the beam properly at no load condition.
  2. Keep the loads gently.
  3. Take the spring balance reading properly.
  4. Measure the span and position of the loads carefully.

Viva Questions:

1.Define a beam?

Ans:.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

Q.-2. Define S.F. and B.M.?

Ans:.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

Q.-3.What are various types of beam?

Ans:.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

Q.-4.What are various types of supports?

Ans:.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

Q.-5. What are various types of loadings?

Ans:.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

Q.-6. What is point of contraflexure?

Ans:.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................

.........................................................................................................................................................