SA57: Reaction Influence Line for Indeterminate Beams

[@ducluongminh5175]

it's easy the way you explain to us

[@rexonakhatoon8108]

Great video thank you very much

[@HashemAljifri515]

Hello madam, in order to be able to use the slope deflection method I need to memorize the formulas?

[@DrStructure]

Yes, if you don’t have access to your notes or a textbook, to apply the method, you need to remember the two slope-deflection equations as well as the equations for calculating the fixed-end moments.

[@HashemAljifri515]

@@DrStructure is it practical? I mean anyone could do it if he knows the formula unlike the force method

[@DrStructure]

Yes, it is practical. When you use the method several times, the equations can be recalled from memory with ease.

[@civl112]

Thank you for the great video. If the unit load is placed at n = 1 m, the solutions at 5:48 give RA=13/32, RB=39/64, RC=-1/64. But these do not seem to satisfy moment equation (about A, ccw = +ve) as -1*1 + 2*RB + 8*RC = 0.09375, not zero?

[@DrStructure]

Thanks for pointing out the inconsistency in the formulation. At 5:00, the expression for RA is incorrect. It should have been written as: Ra = (n^3 - 36n + 64)/64. Given that Rc = (n^3 - 4n)/192, the correct expression for Rb becomes: (112n - 4n^3)/192. Therefore, at n = 1, Ra = 29/64, Rb = 9/16, and Rc = -1/64. Now the moment expression about A becomes: (1)(1)-(9/16)(2)+(1/64)(8) = 0.

[@civl112]

@@DrStructure I see, thank you for the prompt reply. BTW your videos are truly amazing. If there's an Oscar or Grammy Award for structural mechanics videos, you definitely deserve one.

[@mashambashonhai4901]

Good day Dr Structure Is the next SA video going to be on Shear influence on indeterminate structures or its now something else?

[@DrStructure]

The next SA video will cover the analysis of indeterminate tapered beams.

[@mashambashonhai4901]

Hie Dr Structures Do you have have any other links to your videos on other programs other than Structures, eg Mathematics, Mechanical engineering, transport engineering etc, i want to encourage others students from different programs because you are very excellent.

[@DrStructure]

Thanks for the comment and the inquiry. Our focus pertains to structural mechanics/engineering topics only. However, it is our hope that others could step in and create comparable, or even better and more effective content for other engineering areas/topics.

[@mashambashonhai4901]

@@DrStructure Ok thank you so much. You have clarified everything.

[@sha0419]

Can you make a video tutorial for Three-moment equation and method of least work?.please .. Thank you !!

[@venkatesh2285]

Is that equation is applicable to all cases??

[@DrStructure]

No, the reaction equations are derived based on the specific beam lengths (i.e., 2 m and 6 m). But, you can generalize the equations for any length beam using the procedure explained in the video.

[@Harry45628]

Can you make a video on design of structure

[@DrStructure]

Yes, eventually we will get to structural design topics.

[@sainathreddyvarikuti4835]

Do u have videos on shear center , shear flow , torsion

[@DrStructure]

Not at this time.

[@sainathreddyvarikuti4835]

@@DrStructure when??

[@DrStructure]

Cannot even give you an estimate on this. But I could say not in the immediate future as we have a few other lectures in the pipeline already.

[@mashambashonhai4901]

Good day Dr Structure Are you going to get to Finite Element Method anytime soon. Also how soon is SA58 video?

[@DrStructure]

SA58 should be ready in about a week. Lectures on Finite Element Method are not forthcoming any time soon. There are some other grounds to cover before we can focus on FEM related topics.

[@mashambashonhai4901]

@@DrStructure Thank you for the response. I will make use of my available resources on Finite Element Method. As of SA 58, will be glad to get it when it becomes available.