Recent content by scutterbob

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    Making Water Less Dense: A Chemistry Challenge

    You might also achieve your goal by simple aeration. The air or other gas can lower the effective density of the water.
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    Law of physics for beam sizes

    The load type will make a difference, point load vs uniform loads. The beam depth but more specificly the section modulus and moments of inertia determine the strength and stiffness of the beam, and of course the material strength. P = point load L = Span Length W = uniform load (kip/ft or...
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    Need help with factors affecting suspension bridge failures

    I will also add in, learn what concrete and cement are and that they are not interchangeable. Vortex shedding, resonance and insufficient stiffness to the lateral loads were issues. Newer suspension bridges decks are actually designed to produce a net downward force which stabilizes the system...
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    How could the frequency of a guy wire be measured?

    There are several ways but most if not all require some calibration. If you are set on using frequency you need to be able to record a signal from an acceloramater or similar device (LVDT, strain gage, etc). You would want to know your boundry conditions are they do effect the best equation to...
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    Are Storey and Foundation Depths Proportional in Multi-Storey Buildings?

    Well, to be honest I'd never heard of intensity 10. Normally we speak of peak ground accerations. And seismic design spectral acceleration values Ss and S1 which are well explained here: http://www.structuremag.org/article.aspx?articleID=526 Anyway, uhmm you can design for nearly any...
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    What are the different types of woods used in construction?

    http://www.awc.org/standards/nds.html
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    Free 3D Structure Design Sim for Balsa Wood Modeling

    You might be able to use the 2d anyway depending on what your structure is, and what the program your using allows. If you model is planar and those planes are orthogonal, there isn't really interaction in theory anyway... but if you're making a space frame or truss, then its probably got more...
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    What civil engineering travels most?

    I worked for a small company 13 when I joined around 50 when I left. Check the trade publications. Like Road and Bridge for bridge work. Normally inspection work is done by bridge design, or sometimes strictly inspection companies. Depending on your state you might be able to see what jobs the...
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    Are Storey and Foundation Depths Proportional in Multi-Storey Buildings?

    σσNo, 2 to 6 storeys would probably not have to use piles again it absolutely depends on the local soils and other possible hazards. In coastal areas where scour is possible, then yes they almost certainly would have to be on piles and that still might not carry them through a hurricane. In...
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    Mirror Reflection: Tracking Sunlight with Arduino

    Well that wikipedia link I posted pretty much tells you what you need to know. Another source would be the NREL. http://www.nrel.gov/ A simple search for arduino and heliostat brought up: http://www.solbot.at/ a little digging can answer your questions.
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    What civil engineering travels most?

    I worked in bridge inspection for about 5 years. In that time I visited about 25 states, and Japan. Normal trips were 2 weeks in length, and then 2 weeks at home. Everything has its good and bad points. Still have friend working in it, that have traveled even more. Others who never leave the...
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    SSSI (structure-soil-structure interaction)

    Here is a site with many seismic SSI apps http://nisee.berkeley.edu/elibrary/list?a=1056&start=1 However, since you're mechanical, I'm guessing that could be your forcing function. I'll need to dig more for low strain SSI, as it is somewhat different. DYNA5 comes to mind, also GTstrudl...
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    Looking for some sort of 'cable quick release'

    If you're still looking for ideas, I know load wise you are still on your own but these exist. http://www.perfski.com/Waterskis/Trick-Skis/Masterline-Robbins-Trick-Release.html
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    Orifice plate effect on impeller flow rate

    Strangely enough orfice plates are often used for flow rate measurement ;) http://en.wikipedia.org/wiki/Orifice_plate Also, the pump curve would be useful, should come with your pump.
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    Moment of intertia for corrugated pipes

    Normally you'd just calculate the a unit moment of inertia, in^4/in and depending on how perfect you want the value, you either approximate it as the inner tube if it is a simple pipe with the corrugations applied to the outside as stiffeners, and use parallel axis theory to combine. Most...
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