We wish to publish the answers of yesterday’s questions and also appreciate all the students that visited, but more to the ones that participated actively in the duel. It’s quite unfortunate but fortunate that no student got the complete answer. In this regard I advice you to always visit the site daily to learn new thing, ask question(s) in the areas you don’t understand.
(1) For AB is 1.09m & 4.02m. For BC is 3.26m
(2) 4.41KNM
(3) 3.51KNM
(4) SiO2, Al2O3, Fe2O3
(5) The same size, the same length, the same type and the same shape
Below is the solution, please go through painstakingly.
See you next week. Have a wonderful Easter celebration & don’t forget to stay safe.
This solving is not vivid, looking at ur diagram the mBCmax is not right even by mere looking the max moment there suppose to be higher than that of BA nd pls can u with the aid of a diagram show us what a point of contrflexure means
Coming to the solving i solved using 2 widely generally acceptd methods nd having relatively d same ans nd doc dont teach with 3 moment bc it has some shotcomes which i personally have noticed severally sow do we expect d and to b true or is there any proof using any of the 2 above approaches aformentioned for more clearing sir.
Am pleading. Thanks.
Thank you @Henrypeter.In the diagram the point of zero moment was shown. Three moment method don’t have any limitations when it comes to accuracy of the answers gotten. The only setback is when you have more than 3 unknowns, solving it simultaneously won’t be easy. Consult our previous update to know where zero moment occurs. The three methods of analysing indeterminate structures will give birth to same output.on this note the workings are correct .
Then show us with another solving using mdm or slope deflection
2. Look at ur bm diagram at BC, d maximum bm suppose to higher than that of AB. Even by mere looking at it just look very well
By mere looking at it sir, it’s true. When getting your salient moment either of these two ways are used:
1)principle of similarity of triangle and
2) principle of moment over the beam.
It’s advised for one to use the first one, though majority people make use of the second. The difference between the range of answers is from 0-10, you know why? When providing the area of reinforcements, the same diameter of rebar will be used for the midspan.
I still stand on my ground to tell you that either slope deflection, 3moment and MDM will give rise to same answer wholly.
Thanks.
Please be mindful of the kind of words you use here. Justice will be done using slope deflection & moment distribution method later today to buttress on our solutions.