Structural Theory 1 Conjugate Beam Method Problem 1 (PH)

[@n0rth_219]

Mali poba kung ang moment ko sa real beam naka clockwise instead na counter clockwise gaya ng sayo?

[@cebox]

What do you mean po? Na nasa taas ang Moment diagram po ninyo? Mali po yun kapag ganun. Kapag nagmano-mano po kayong shear and moment diagram, negative po ang moment diagram nun which is contradicting sa positive po ninyo na moment diagram. Better to practice po yung moment by parts. Simple lang naman po e, if saan iikot ang force, dun nakalocate yung moment diagram niya. For example po sa problem na 'to, nagmoment tayo sa A, so ang 25 kN is iikot pababa papunta A, so nasa baba ang moment diagram. Kung ang 25 kN naman ay directed upward at nagmoment tayo sa A, then iikot yun pataas, kaya nasa taas na side ang moment diagram mo nun. Then about naman sa degree ng diagram, need niyo na po mapratice iyon sa shear and moment diagram under sa StreMa kung 1st, 2nd, or 3rd curve yung moment diagram. (Sorry for the very, very late reply as CE Box is very busy with his Master's Degree, Accreditation, Work Stuff, and Life. Thank you for understanding. Keep in touch with CE Box as we plan to do more video tutorials.)

[@isit.1264]

hays buti pa to madali

[@cebox]

HAHAHAHAHAAHAHAHAHAHA! Madali nga 'to as in. Pero, naging madali na lang ang conjugate beam method since sanay ka na sa Moment by Parts sa Moment Area Theorem. ;) (𝗦𝗼𝗿𝗿𝘆 𝗳𝗼𝗿 𝘁𝗵𝗲 𝘃𝗲𝗿𝘆 𝗹𝗮𝘁𝗲 𝗿𝗲𝗽𝗹𝘆. 𝗪𝗲'𝗿𝗲 𝗷𝘂𝘀𝘁 𝗯𝘂𝘀𝘆 𝘁𝗵𝗲𝘀𝗲 𝗽𝗮𝘀𝘁 𝗳𝗲𝘄 𝗺𝗼𝗻𝘁𝗵𝘀 𝗶𝗻 𝗼𝘂𝗿 𝗽𝘂𝗯𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝘀𝗮 𝗠𝗮𝘀𝘁𝗲𝗿𝗮𝗹, 𝘀𝗮 𝗧𝗵𝗲𝘀𝗶𝘀, 𝘄𝗼𝗿𝗸 𝘀𝘁𝘂𝗳𝗳, 𝗮𝗻𝗱 𝗹𝗶𝗳𝗲. 𝗛𝗼𝗽𝗲 𝗻𝗮 𝗻𝗮𝗸𝗮𝘁𝘂𝗹𝗼𝗻𝗴 𝗮𝗻𝗴 𝗖𝗘 𝗕𝗼𝘅 𝘀𝗮 𝗶𝗻𝘆𝗼𝗻𝗴 𝗽𝗮𝗴𝗮𝗮𝗿𝗮𝗹. 𝗧𝗵𝗮𝗻𝗸 𝘆𝗼𝘂 𝗮𝗻𝗱 𝗚𝗼𝗱 𝗯𝗹𝗲𝘀𝘀!)

[@andreimontes5180]

Sir kunyari po pinapahanap po reaction dito sa support A using cbm which is a fixed support, pano po kakalabasan.

[@christopherbancifra9900]

is there a way na malocate yung max deflection using conjugate beam method? tnx

[@cebox]

Nasa prob 1 palang po kayo. Check all the problems. May ganun po kaming situation na sinolve. 😇

[@christopherbancifra9900]

@@cebox nakita ko na sir, thank you po

[@nabiamaryann3705]

bakit po kaya hindi kasali yung uniform load for concentrated load po?

[@bensauquillo7056]

Pano po pagkuha ng reactions kung ang beam ay may isang hinged support at may dalawang roller support tapos wala siyang internal hinged? Thank you sir in advance.

[@cebox]

Hi. That is statically indeterminate beam. Hindi na po enough ang Equilibrium Condition para sa ganung type of structure. Need na po ng compatibility equations such as deflections, etc.

[@bensauquillo7056]

@@cebox Nag double integration method rekta na ko para makakuha ng 3rd equation. Eqn 1 ko is from Fy=0 tapos Eqn2 ko is nag moment ako then 3rd Eqn is from DIM sa deflection method. Pwede po yun? Thanks

[@cebox]

Wait. Parang hindi ako familiar sa ganyang concept na kukunin ang unknown gamit ang DIM. Hmmm, mas alam ko yung slope deflection method para sa indeterminate beams. Anyway, meron din naman na DIM para sa Indeterminate Beam but nor familiar with it. Try Slope Deflection Method.

[@bensauquillo7056]

@@cebox so ung y' lang gagamitin ko since may mag ze zero slope naman sa beam? try ko po gawin

[@libanilmiguedi4505]

why in the moment diagram 125 is negatif ? knowing that the rotation of that moment is anticlokwise meaning positive moment

[@hdksosphskkss4404]

? it depends if you assign clockwise or counter clockwise to be positive. I can also assign left as positive if i want to.

[@cebox]

@Liban llmi Guedi: That process is what we call "moment by parts". It is recommended to use moment by parts in Moment-Area Theorems and Conjugate Beam Method. If you will manually do the shear and moment diagram, you will end up with the same moment diagram that we used in this video. Anyway, it is not "anticlockwise" but it is "counterclockwise" if that's what you are trying to say. (Sorry for the very, very late reply as CE Box is very busy with his Master's Degree, Accreditation, Work Stuff, and Life. Thank you for understanding. Keep in touch with CE Box as we plan to do more video tutorials.)

[@jayrestrella4960]

Paano po if Loc and Max Deflection yung hinahanap s beam kaya po ba ma solve gamit ang conjugate beam? Para stick n lang ako s isang method. Thanks po s reply

[@cebox]

Yes. Pwede po. May example po rin ako na ganun under sa Conjugate Beam Method. Tingan niyo na lang po sa playlist na ito: tinyurl.com/4ckyn93c Anyway, hindi po kayo pwede magstick lang sa isang method. You need to study all 3 methods, kasi maoobserve mo po kung ano ang magandang gamitin depende sa type at location ng mga support sa isang beam. May disadvantage and advantages kasi sila.

[@oliverandersons2305]

paano po kung may specific location ng deflection hinahanap sir?

[@cebox]

So if deflection at specific location or point, under conjugate beam, that is the moment at specific point. Magmoment ka lang sa point na yun then that is the deflection at that point. P.S. Sorry for the very late reply. Abala sa Masteral and work.

[@alynettejoycemerza5857]

Sana wag niyo po ishort cut

[@cebox]

We'll release again this topic under sa Strength of Materials by next week. Expect niyo na may solution na rin para sa mga reaction.