i watch this video 2-3 time .... but all calculation you have done in step 2... is out of my mind. can you explain this in full detail. like how moment at A 185KN come and at B 95KN. PLZ Do help me... i have exam on this topic and this is very imp ...... OR plz ref. me any book on which portal frame are explain so well manner.
S Agrawal Moment at A is found by finding reactions before splitting the member i.e. in the entire structure , the equation to find Ma would be (considering Ma clockwise) Ma + 20*3 + 16*5 + 6*5*2.5 - 10*3 = 0 The moment at B is found after splitting the members,the equation for finding Mb (considering Mb clockwise) is: Mb + 26*5 - 185 - 20*2 = 0 I hope you got this.
Step3: in DC member I guess the moment present is probably causing sagging so Mx equals to +1 I guess? Since in AB member you took opposite sign convention as that of DC member? Waiting for reply.
Sum of moments at A taking anti clockwise as positive = 0. Ma-6(5)(2.5)+10(3)-20(3)-16(5)=0, Ma is therefore 185. Same direction as initially assumed, thus anti clockwise
sir please explain that in step no 3 for member AB while applying 1 kn load at horizontal redundant,why u have taken moments in same direction for both ends in member AB,kindly resolve this,i will be very thankful
That really depends on you, you can consider either of them to be positive but you have to stick with it in entire numerical. Standard sign conventions cannot be enforced as different countries follow it differently.
Thank you nd good explanation But still not getting very first reactions and moment. If you don't mind please can you provide how that 26,30,185 have got?
bro in m3 equation why did you assign all (-) sign as we can see two mx equation BE and CB had clockwise moment you got me in real bad confusion right here :(
sir, can i know which software r u using for these calculation?how u draw these loading diagram its just amazing and must attractive....thank u sir ........just keep it on.......lots of love
At 6:37 you have got a clockwise moment at C i.e. 20kNm. Shouldn't it be +130kNm. You missed the 30kN vertical force. Is this deduction correct, or am I missing something here?
+Kshitij Kumar while writing moment equations it is not clockwise or anticlockwise that is positive or negative it is based on sign convention that you follow for drawing bending moments for eg sagging positive and hogging negative, for more details you can watch a video on channel that is completely dedicated in understanding moment sign conventions
Kshitij Kumar perhaps hogging and sagging is just one sign convention, another sign convention is Clockwise moments from left hand side are positive Anticlockwise moments from left side are negative Clockwise moments from right side are negative Anticlockwise moments from left side are positive After knowing these sign convention watch the video again you might understand
sona nanu please check a video about bending moment sign conventions that is on my channel in that i have covered all conventions used for writing bending moment.
gaurav thakur it is simple summation of forces in x direction, then in y direction and then summation of moments at A=0, using static equilibrium equations u get the reactions at A
you the only one explained flexibility frame perfectly and easily(to me), thank you.
You are right man
Just amazing, made it very simple to understand and solve
You did a fantastic job here
best explaination skill.. loved your concepts...
Amazing explanation .... please provide more related videos .....thank u
Thankyou so much for this video it was of great help to me
What a nice explanation man... Awesome good 👍🏻👍🏻👌🏻👌🏻👌🏻
thanks a lot from Bangladesh
Amazing. ❣️
sooper bro
nice explained in clearly
U should elaborate the concept to find moment..this is the only part to understand . Rest is easy
thank you so much...........
i watch this video 2-3 time .... but all calculation you have done in step 2... is out of my mind. can you explain this in full detail. like how moment at A 185KN come and at B 95KN. PLZ Do help me... i have exam on this topic and this is very imp ...... OR plz ref. me any book on which portal frame are explain so well manner.
S Agrawal Moment at A is found by finding reactions before splitting the member i.e. in the entire structure , the equation to find Ma would be (considering Ma clockwise)
Ma + 20*3 + 16*5 + 6*5*2.5 - 10*3 = 0
The moment at B is found after splitting the members,the equation for finding Mb (considering Mb clockwise) is:
Mb + 26*5 - 185 - 20*2 = 0
I hope you got this.
Thanks you😊
20x3+16x6-10x3+6x5x2.5=185
26x5-185-21x2=95
Bhayya how to apply 10*3
@@gudlaspandana9294 Because the horizontal point load 10kN acting 3m from A
oooo lovelyyy
Thank u sir...
Step3: in DC member I guess the moment present is probably causing sagging so Mx equals to +1 I guess? Since in AB member you took opposite sign convention as that of DC member? Waiting for reply.
Sir in step 2 moment at c is 20 we got clock wise..we need to put anticlockwise to counter act but u put clockwise
how did 185 come at A
I couldn't understand how generate the mx equation in cd segment ??
Mx in CD is generated about point D. Since CD is divided into two spans therefore you need to write Mx equation for both spans separately
Could you please make a video on when support settlement is there what should be the work we do?
Ok
@@DCBAonline make a video on cantilever method and portal frame method also
SIR HOW DO YOU GET MOMENT =185 , AT POINT A ..?
Sum of moments at A taking anti clockwise as positive = 0. Ma-6(5)(2.5)+10(3)-20(3)-16(5)=0, Ma is therefore 185. Same direction as initially assumed, thus anti clockwise
sir please explain that in step no 3 for member AB while applying 1 kn load at horizontal redundant,why u have taken moments in same direction for both ends in member AB,kindly resolve this,i will be very thankful
How to solve flexibility matrix in excel to calculate Reactions and moments ??
Using matrix functions of excel.
which direction is positive? anti- or clockwise?
That really depends on you, you can consider either of them to be positive but you have to stick with it in entire numerical. Standard sign conventions cannot be enforced as different countries follow it differently.
Thank you nd good explanation
But still not getting very first reactions and moment. If you don't mind please can you provide how that 26,30,185 have got?
kb sanlk they are reactions of the primary structure found by solving 3 simple equilibrium equations Fx=0;Fy=0;M=0
bro in m3 equation why did you assign all (-) sign as we can see two mx equation BE and CB had clockwise moment you got me in real bad confusion right here :(
During mx equation ... don't consider Clockwise or anticlockwise moment... consider hogging (-) n sagging (+) sign
how are you getting 20 moment in point c of bc in step 2?
Summation of Mc=0 (considering Mc clockwise)
Mc + 30*5 - 95 - 6*5*5/2 = 0
Mc = 20kNm
sir, can i know which software r u using for these calculation?how u draw these loading diagram its just amazing and must attractive....thank u sir
........just keep it on.......lots of love
Microsoft Powerpoint 2016
Sir how at pint b the equation of mx is -6x-95 sir please reply me as i am having exam tomorrow pls help me sir thankyou
Excuse me, shouldn't the internal moment at C be 25 kN.m instead of 20 kN.m?
And why do you think this? Can you prove its 25 instead of 20 ?
What is the meanin of EI?? . I cannot get it what you say in the video
Youngs Modulus multiplied by inertia
At 6:37 you have got a clockwise moment at C i.e. 20kNm. Shouldn't it be +130kNm. You missed the 30kN vertical force. Is this deduction correct, or am I missing something here?
Mc = 30*5 - 6*5*5/2 - 95 + 20
@@DCBAonline this is -20 so should'nt it be anti clockwise?
At STEP 3 UNIT LOAD STRUCTURE how the Mx be -1 (except A) as you have taken clockwise moment +ve..?
+Kshitij Kumar while writing moment equations it is not clockwise or anticlockwise that is positive or negative it is based on sign convention that you follow for drawing bending moments for eg sagging positive and hogging negative, for more details you can watch a video on channel that is completely dedicated in understanding moment sign conventions
DCBA online link to that video
DCBA online if we have to see hogging and sagging BM then why did you tell the direction +ve and -ve ?? 😅. It is confusing me
Kshitij Kumar perhaps hogging and sagging is just one sign convention, another sign convention is
Clockwise moments from left hand side are positive
Anticlockwise moments from left side are negative
Clockwise moments from right side are negative
Anticlockwise moments from left side are positive
After knowing these sign convention watch the video again you might understand
sona nanu please check a video about bending moment sign conventions that is on my channel in that i have covered all conventions used for writing bending moment.
Is sway and non sway applicable in flexibility method?? Reply me ASAP coz of exams 🙏😅😅
plz provide Flexibility method for space frame and Truss??????
Ejlal Tariq flexibility for space frame would be complex beyond imagination, truss i will upload later on.
R/sir. i have to learn both space frame and truss as soon as possible. would you plzz help me?????
Mx = -26x-95 right..?
is flexibility matrix same as stiffness matrix?
fazel ally no its not the same, stiffness is the force required for unit deformation and flexibility is the deformation done by unit force.
thanks do you have any videos on stiffness matrix ?
ok found one thanks sir
Where is the link of sinking flexibility sum
th-cam.com/video/nyjAfDLTqdM/w-d-xo.html
didn't understand the reactions at point A.........how it came ?
3:02
gaurav thakur it is simple summation of forces in x direction, then in y direction and then summation of moments at A=0, using static equilibrium equations u get the reactions at A
Sir Answer is not matched please check
how 16kn
Thanks sir
But i have problem at last to calucate moment of 38.9311 at support A
Help me sir i have exam tomorrow
this is not matrix, okay! you're just using subtitution
Plz provide me
not a matrix/flexibility mathod ...total clickbet
Dude then which method do you think this is?
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