Recent content by allblue123

Any chance that you could take a look at those question too? Its very last minute for me as I'm taking the paper on tuesday. :)

One more attachment :)

First question: find the horizontal displacement (extension?) of the horizontal member My attempt: I have eliminated all the zero force members and calculated forces in remaining. However, for the work done equation I'm not sure whether to use 200 kN as the force or the total force in the...

I'm really out of ideas with this one unfortunately >_< I did a free body diagram at the left vertical member but I'm not quite sure how I can derive the last equation from it. I noticed that I had vertical reaction at B the wrong way, which made the previous horizontal force at B positive...

Ah again, I'm so silly! Makes perfect sense now :) Almost through the paper! ^_^ I'm a bit confused with question 5, since the two vertical sides of the portal frame are not at the same length, I'm ending up with too many unknowns when resolving vertical, horizontal and moments. At the top...

Sorry for the late reply. Now I've taken a closer look, I noticed that the triangle of forces aren't in equilibrium. For example at the left most members (as in the picture) if I start resolving at 50 kN vertical member, the tension members came out as 70.7 kN and horizontals at 50kN each...

Silly me, I kept thinking there was a horizontal force at top right corner >_< I think it makes things a lot clearer now. :) I didn't label the zero force members.

Hello, thank you very much for your help so far. However, I'm very confused with the second problem. I have come under the suspicion that the left member of the two vertical members in the middle might be in compression. Perhaps could you please give me more hint as to which members I...

Hello thank you for replying, I have made a new thread in engineering help forum for wider viewing as you've suggested :) please take a look at it for me: https://www.physicsforums.com/showthread.php?p=3467319#post3467319 thanks Edit: here is my solution to one of my question in case...

Forces in members Homework Statement Determine which members are in compression, tension, and zero force members Homework Equations Can you please check the members for me please? The Attempt at a Solution Please see the attachment for my attempt :)

Structures (civ Eng) urgent help Hello, I've got two resit exams coming up in over a week for Civil engineering first year structures 1a and 1b. I've been attempting several past papers and there were some questions I desperately need help with. I'm not sure if this is exactly the...