Recent content by mdub12

  1. M

    Section and plastic modulus of built up members

    never mind, pretty sure it has to be all calculated by hand
  2. M

    Want to be an Engineering Student - a few questions

    you don't need to already be really good in math to be an engineer, it's just going to be a lot harder. you can learn anything if you put enough time and effort into it. but as for being an engineering major, any type of engineering is going to be the hardest of majors compared to any other...
  3. M

    Section and plastic modulus of built up members

    is there a simple way to determine the section modulus of a member made of a W and WT shape welded together, one on top of another about the x-axis. the steel manual has the properties for the individual sections; would the section modulus of each be able to be added together or will i have to...
  4. M

    Is an English A Level More Useful Than Chemistry for Aspiring Physicists?

    do A level classes count for credit in college? if so, take the english so you won't have to take it in college.. your going to want to take chemistry in college, so you have a good understanding of it when you need to use it in more advanced classes
  5. M

    Schools Maximizing Your Chances of Getting into Grad School for Structural Engineering

    im currently a 4th year civil engineering student hoping to go to grad school for structural engineering. it seems that a masters degree is required for most all structural engineers. with just an undergrad degree i will only be taking a few structural courses, which doesn't seem adequate for...
  6. M

    Arch Bridge Shear and Bending Moment?

    i don't think he has given you any assignment yet, he's just telling you what your going to be doing
  7. M

    Structural analysis stiffness method

    I figured it out.. AD = Adm + kD AD = 0 K11 = EA/L + (EA/(L+e))cos2(30) + EA/L cos2(60) = 2EA/L Adm = PL/EA = ecos(30) --> P = EAe√3/2L --> D = √3e/4 AR1 = Arm + FrD AR1 = EA√3e/4L AR2 = -5EAe/8L AR3 = EA√3e/8L
  8. M

    Shear and moment diagrams: help with moment diagram

    your reactions at A and B are miscalculated I get 23.333 at A and 18.667 at B
  9. M

    Structural analysis stiffness method

    http://www.flickr.com/photos/53948823@N08/6193375731/ I need to solve this problem but with member 2 as L+e instead of L, and omit the load.. Since I only see one degree of freedom, i don't know how to set up the matrix to solve for the 3 forces. I have K11 = EA/L + (EA/(L+e))cos2(30) +...
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