Questions tagged [structural-engineering]
Questions related to the integrity, design requirements, or analysis of structures.
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How does a church built from stones survive 70 years under water?
Following the recent news about the Sau reservoir in Spain, the draught revealed an 11-century stone church which has been under water for 70 years since 1962 when the reservoir was built.
How is it ...
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Combined shear stress due to shear force and torsion
Let's assume I have a rotating shaft supported with bearings at both ends. This shaft is exposed to a point load (by means of another bearing) at some point and a torque. I want to calculate shear ...
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DLC wear resistance
I read that a thickness of one micrometer of DLC coating (which, if I understood correctly, shows similar properties to diamond), increases the lifespan of an item plated with it from a week to more ...
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I'm Missing Something on Problem 3 in Section A5.4 of Bruhn's Analysis and Design of Airplane Structures
I've been working through the 1943 edition of Bruhn's Analysis and Design of Airplane Structures. I found an archive.org pdf version of the 1948 edition that includes answers to select problems, as ...
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$𝛕_{xz}$ in the flanges of T and I Sections
When we have a T or I section under a shear force $V_y$ I usually must account for a horizontal shear force across the section's Z axis ($𝛕_{xz}$). I understand why a transverse shearing force would ...
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What does "dc" stand for in this Positive Bending Moment for Plastic resistance of a composite concrete slab formula?
I'm designing a building with a composite slab with profile sheeting and steel structure, while trying to test the resistance of the composite slab in "composite phase" to bending moment I ...
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Is it OK to separate fire and structural analyses when analyzing a fire induced building collapse?
This is from NIST NCSTAR 1-6
It seems to me there are problems with this approach. The heat distribution depends on fire spread and ventilation paths, which in turn depend on the shape of tjr ...
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Conflicting steel strength Vs temperature graphs, NIST NCSTAR vs Engineering Toolbox
This graph is from NIST NCSTAR 1-6C
And this graph is from the Engineering Toolbox.
As you can see, neither the NIST yield or tensile curves match with the ET structural steel curve. Why? And which ...
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Find the internal bending moment, Mc
A 7meter,m, long cantilever beam whose weight per meter is 19Newton, N, carries a load that varies uniformly from 43N/m, (Newton/meter), at the inbuilt side, point A, to 0 at the free end, point B. ...
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What is the shear force at point B? Is it +P or -P or zero? I am not able to find any source that gives the right information
I am not able to understand here that what should be the value of Shear force at point B. It seems to be a discontinous point, as there is point load there, but can we say about the exact value of ...
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Counterweight requirement and platform design for motorised speaker stand stability
I recently bought my dream speakers (Dutch & Dutch 8c), but at the cost of having to preserve a minimalist interior for the sake of household peace. To that effect, I plan to construct motorised ...
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Ando dots or holes in concrete walls
I am making a concrete poured wall with holes where the bars to support the wood frame remain. Question is with plywood supporting frame what is the greatest distance between bars that will still ...
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Does the magnitude or range of interaction of a force affect which layer dominates the mechanical response of a multilayered structure?
Suppose I have a two-layered material, with a stiff and thin outer layer (high E) and a soft (low E) and thick inner layer.
Intuitively, it feels like the effect of short-ranged forces (e.g., van der ...
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How is the number of memebers in a truss calculated?
In a fully connected truss (each node connected to all other nodes), the number of members (bars) is equal to $n(n−1)/2$ where $n$ is the number of nodes.
I don't understand the derivation of this ...
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Contradiction in Convolution Solution
In this question, I solved the convolution for triangular pulse and the solution was
Now take k = 1, m = 1 , And as R = Ku/P0, R =
So, for t<td u(t) is a function of t and for t>td its a ...
