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From what I see, in this picture from the Shigley book, if I really had to, I would extrapolate to 0.5 (or more precisely interpolate between the limit cases). The limit cases for very thick plate (d/h=0) and very thin plate ($d/h\approx \infty$) have values for d/w close to 0.7. (I would hazard a guess that these solutions are based on analytical ...


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There have been many attempts to simplify the stress distribution in reinforced concrete beams. In 1937, Whitney proposed the use of a rectangular compressive stress distribution to replace the parabolic stress distribution. After many tests, he chose average stress of 0.85f'c, with a rectangle of depth $a = \beta c.$ Whitney determined that $\beta$ should ...


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So, in such problems, the first thing to do is calculate the support reactions. Thankfully you've already done that correctly, so we can move on from there. Now, something to keep in mind when trying to figure this sort of thing out is the fundamental equation of Euler-Bernouilli Beam Theory: $$\dfrac{\text{d}^2}{\text{d}x^2}\left(EI \dfrac{\text{d}^2w}{\...


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The three diagrams (axial, shear, bending) are the following. Axial is required because the section BC (at 4[m] from the left support) is subject to axial stress the way it is oriented. The sections AB and CD are subjected to shear forces (and the value is constant at 10[Nm]). Finally, the bending diagram. A quick note, on this diagram don't pay attention ...


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According to New Atlas, a solar power plant went online in 2009. The principles are similar to your diagram, but simpler. Mirrors (not lenses) redirect sunlight to a single point atop a tower, which converts water to high pressure steam. The steam is used to spin turbine generators, located on-site. The expended steam is thereby cooled and condensed and used ...


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Generally speaking the main application I can think of for trusses with unbraced compression chords is pony truss bridges. The AASHTO (ugh) Guide Spec for pedestrian bridges might have some information. I also believe the American Wood Council's NDS might have a paragraph with prescriptive requirements for unbraced wood truss chords in compression. It really ...


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Call both the engineer and the builder, strong enough is one thing but meeting specifications ie building regs is another. If the engineer won’t sign it off then you have a problem.


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Standards are experts common sense thoughts on the minimum safe ways to design, build and operate something. Standards are designed for voluntary use and do not impose any regulations. However, laws and regulations may refer to certain standards and make compliance with them compulsory. A building code usually refers to multiple standards, with specific ...


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Code, as it relates to construction, is used mainly as guidelines in cases where there is an obligation to design and build structures or part of them in a certain way. ASCE is just a part of the code. It can have a wide scope, such as classifying building types and their functions. It can classify the behavior of natural phenomena like earthquakes, soils, ...


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Why only on the compressive side: Concrete has an unpredicable tensile behaviour. It is strongly recommended to avoid any tensile stresses on a concrete beam. So, what happens in this case, is that only the section of the beam which is in compression contributes to the load carrying capacity of the structure. That is why the rectangular section is limited to ...


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I worked for a main contractor as project engineer. Taking my experience from one of my project. To be more specific, when we are driving piles into the soil, say we are using hydraulic hammer pile rig to do the driving, we would measure and record the number of blows that required to drive each 300mm depth and consequently the final 10 blows settlement and ...


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Make use of the DOF numbering as "indices" pertaining to the element stiffness coefficients in facilitating the aggregation of the global direct stiffness matrix. Adding a moment release would make the rotational displacements of the connecting member distinct from each other right? So, define a node at the joint where you will apply a moment ...


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