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The fact that design of concrete slabs or beams uses straight reinforcing bars running orthogonally doesn't have much to do with the geometry of slab, beam or a deck, etc. It has to do with the fact that straight bars can take large amount of tensile stress and with their counterpart compressive concrete take large moments, without any tendency to peel ...


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You are misunderstanding what the assumptions are. The only lines which are assumed to remain straight and normal to the axis (but not inextensible) are those perpendicular to the plane of neutral bending of the beam. If the beam bends in two planes, since the theory assumes small displacements and linear behaviour you can combine the deflections in each ...


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Auditoriums and arenas have much larger clear spans ; It just takes large steel beams or trusses . The beam sizes will be strongly affected by the loads you plan for the upper floors.


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Yes, it is possible by using trusses, 2D or 3D. Or special configuration on adjacent span beams such that those beams can cantilever into the clear space by say 25' from each side thus reducing the effective span to 80' by 40' while using high strength concrete and post strees cable or some other expensive complex mixture of these. One has to consider the ...


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I would calculated the I being allocated to two different materials, foam and paper. one way of getting a sense of the difference between the two is to let the paper beam on its side flatwise, and measure the E of the paper by neglecting the contribution of foam, if it is not paper on both sides glue 2 back to back to make it so. Because in that ...


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As recommended by @Solar Mike, the most "professional" solution is to let the end-user decide. Give them some input mechanism (a textbox, slider or dropdown, for example) so they can define which value to adopt. This is what you'll see in basically any modeling software you'll find in the wild. However, it's also very important to note the observations made ...


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To rigorously solve for deflections of indeterminate structures, the most feasible method is the Direct Stiffness Method (aka matrix methods). This is generally the approach finite element method software packages (FTool, SAP2000, RISA, etc.) are implementing when dealing with line elements. For structures with a relatively small number of degrees of ...


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Make it user definable and provide the info about the ranges as you stated. Consider whether you should limit the extremes of value...


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I don't want to take away the opportunity to work out the exact details for yourself, but I'll talk about the thought process I would use to approach these questions, and hopefully that will help clarify things. Firstly, while I understand that the problem statement says to complete (a) before (b), I think at the point that you're getting stuck, it makes ...


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