Using your plate as boat hull implies a complex load profile probably involving compression, shear and bending, possibly even torsion. In such cases, it is effectively impossible to give a simple ...

Given that the water level will probably remain almost entirely stable, dead loading is the way to go. In fact, the only time I imagine the water level would change is if the pool is emptied for ...

I assume you mean a beam with three spans of equal length $L$ under the effect of a uniform distributed load, like the one displayed below. Also, I assume you're asking about the maximum displacement ...

You've got your terms confused. The maximum shear stress at the midpoint is equal to $$\tau_{max} = 1.5\frac{V}{A} = 1.5\overline\tau$$ where $\dfrac{V}{A}=\overline\tau$, which is the average ...

No. In fact, SLS frequently leads to a higher factor of safety than ULS. This is because ULS deals with whether or not the structure will collapse. It does not care whether the structure will stand ...

The most common way to model this structure is as follows (ignore the fact that the proportions are a bit off): So, all of the diagonals are pinned-pinned. You'll notice in the schematic, however, ...

Adding to @Air's answer, there's also the issue of boundary conditions. A simple span where neither support allows for axial displacements will have a slight gain in length, including along the "...

A hinge is a point where there is no restriction on rotation. For other points on a beam, the rotation to the left of a point must be equal to the rotation to the right of that same point; that is, ...

Let's start talking not about hinges, but supports. Specifically, why do supports generate the forces (including bending moments, if applicable) they do (or don't)? Think of a simply supported beam ...

As @pauloz1890 has already stated in his answer, if you add a hinge to a beam-column connection, you will eliminate the bending moment on your column (assuming no horizontal loads are applied). That ...

I understand your structure is as follows (where the circular version is just an example of a "curved" link): One thing that is clear is that this structure is isostatic, therefore the external ...

When trying to figure out whether or not a given reaction will exist at a given support, it's worth remembering what a reaction actually is. A reaction is the means by which the support resists the ...

A point of inflection is defined as the point where a function changes from convex to concave or vice versa. For a function $f(x)$, this is frequently mathematically defined as the point where f''(x)... View answer Accepted answer 5 votes To answer your question, you just need to break the inclined force into its component X and Y forces: \begin{alignat}{4} f_x &= \dfrac{20}{\sqrt{1^2+1.5^2}}&&=11.09\text{ kN} \\ f_y &... View answer Accepted answer 5 votes Elements under compression such as the vertical columns in your tower can collapse in two very different ways. The first is via simple crushing of the member. This happens when the applied load ... View answer 5 votes On average, it's best to limit the number of layers of rebar. There are a few reasons for this. Firstly, the more layers you have, the more complex the construction of the beam becomes. The first ... View answer Accepted answer 5 votes Obviously this depends on the relative size of the sections. Assuming that the rectangular section's smallest dimension is equal to (or greater than) the square section's side and their thicknesses ... View answer Accepted answer 5 votes Your general idea is correct. Your fingers apply a force which can be translated to a moment at the rotation axis. The reaction forces applied by the object to be cut must generate an equal moment at ... View answer Accepted answer 4 votes Some other answer have touched upon this, but I think it needs to be made explicit: Your mistake is in thinking that civil engineering is about making the lightest structure possible. It's not. ... View answer 4 votes You are unfortunately most likely correct, and your description even grazed right by the official terminology for such things: hostile design/architecture. As other answers have mentioned, such a ... View answer 4 votes One of the foundational principles of structural engineering is obviously safety. And one of the foundational aspects of safety is the ability to show warning signs prior to any accidents. In the case ... View answer 4 votes This is an isostatic structure, which means it can be "trivially" solved (once one is more experienced) by hand. The first thing to do is to calculate the reactions. In this case you can see that all ... View answer 4 votes While this beam presents five constraints (X_A, Y_A, M_A, Y_F, Y_G), it is in fact statically determinate. A statically indeterminate structure is one where there are more unknowns (... View answer 4 votes The first thing to note is the fact that, without some sort of bracing within BCEF, the structure is unstable. As-is, that square is completely flexible, and can flatten completely: CE can move down-... View answer Accepted answer 4 votes While I agree with AndyT's philosophy of simply using the solved equations, it is important to learn the origin of these solutions, so here we go. The mistake you made was that you didn't perform the ... View answer 4 votes The \propto symbol represents proportionality. So, whatever is on the left hand side is directly proportional to cross-sectional area and inversely proportional to volume. Now, as to the actual ... View answer Accepted answer 4 votes Model 1 is always better, but may need some modifications Whenever you have two reinforced concrete elements, you always need to facilitate the transfer of internal stresses between them. This is ... View answer Accepted answer 4 votes No, as the Wikipedia article states, a uniform load's unit is in "force per unit length" (F/L), which means it is a load applied along a given distance. So, if you have a 102 g beam, it weighs ... View answer Accepted answer 4 votes Beams have a property we call moment of inertia (I) which controls how strong they are to resist bending. For rectangular beams, the equation isI = \frac{bh^3}{12}$where$b\$ is the cross-...