Solution to Questions of the Week and Winners (03/06/2018)

By
Ubani Obinna Uzodimma
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Last week, we presented some questions on structural mechanics, and we wish to publish the answers and congratulate the winners.



Monday (28/05/2018)
We were required to obtain the column moment of the frame loaded as shown below.

We can simply obtain this by summing up the moment at point B due to the externally applied;

Let anticlockwise moment be negative;
MBBelow = (-2 × 2) + (6 × 2.5) = 11 kNm
It is as simple as that. So the correct option A.


Those that got the answers correct are;

  • Thaddeus Odinakachi Ekwughaa
  • Ogundare Folahanmi
  • Guiseppe Martino Erbi
  • Ogungbire Adedolapo
  • Romel Batongbakal
  • Ajit umar Mohanty
  • Abdul Basheer
  • Shrujal Barvaliya
  • Ovie Agbaga
  • Peter O.
A big congratulations to you all for contributing to knowledge and undersyanding.
Wednesday (30/05/2018)
We were required to plot the bending moment of the frame shown below due to the applied unit load;
The frame is statically determinate and stable.
Therefore the moment at point C due to the load at point C is given by;

MC = (1 × 3.0) = 3.0 kNm
This moment of 3 kNm acts as a couple from point C and goes all the way down to point B.

The moment at point A is given by;
MA = (1 × 11) = 11.0 kNm

Therefore, the correct option is A.

Those that got the answer correct are;

  • Guiseppe Martino Erbi
  • Ogungbire Adedolapo
  • Romel Sevilla Batongbakal
  • Feyisetan Kwasima
  • Ajit Kumar Mohanty
  • Charles
  • Thaddeus Odinakachi Ekwughaa
  • Palo Tuleja
  • Shrujal Barvaliya
  • Shah Ezud Din
  • Ovie Agbaga
  • Peter O.
A big congratulations to you all.

Friday (01/06/2018)
We are to calculate the deflection of the structure by considering the main moment diagram and unit state diagram.
Solution;
Deflection = 1/4 × 6 × 2× 2 = 6/EI metres
Those that got the answers correct are;

  • Ogungbire Adedolapo
  • Ogunleye Emmanuel
  • Mezie Ethelbert
  • Giuseppe Martino Erbi
  • Romel Sevilla Batongbakal
  • Ovie Agbaga
Winners
From the rules of the competition, the winners for the week are as follows;
  • Ogungbire Adedolapo
  • Giuseppe Martino Erbi
  • Romel Sevilla Batongbakal
  • Ovie Agbaga

We say a big congratulations to you all, and we sincerely appreciate your valuable contributions. Kindly forward your e-mail addresses for some special gifts. Our sincere appreciation also goes out to those who participated on various social media platforms. God bless you all.


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