Soil Mechanics

So far in this post series, we introduced the most basics of structural related concepts, (most of which of which we will also use in this section too) and now we can move on to geotechnical branch of civil engineering. As we mentioned before, geotechnical branch is mainly separated into two as soil mechanics and […]

Stress vs Strain, Elasticity Modulus

Stress vs Strain, Elasticity Modulus

After discussing stress and strength, the next important item to know is the relation of stress versus deformation. Imagine a material which is somehow perfectly rigid. In other words, it never deforms, no matter how large, even infinite, load you apply on it. In nature no such material exists. Every material, no matter how strong, […]

Mohr’s Circle

Mohr’s Circle

In many cases, when performing structural or geotechnical calculations, it is important to know the possible effects of stresses that act on materials not from just one direction, as we saw above, but from multiple directions, which happens quite a lot. The effect of stresses acting from multiple directions will cause the materials to fail […]

Concept of Stress

Concept of Stress

Many things in civil engineering are expressed in terms of stress, rather than forces (loads). The stress (pressure) is found by dividing the force (load) by area. So, Stress = Force / Area So it has units of Newtons per milimeter square, N/mm2 (Mega Pascal – MPa), or pounds per inch square,  lbs/inch2 (psi) for […]

Strength / Mechanics of Materials

In previous section, we dealt with external forces acting on bodies, but we didn’t care about the actual material itself. We thought about ideally rigid materials. We did not consider how strong were our materials, what happens to materials, when forces act on them, how much they deform or and at what point they break. […]

Types of supports

Types of supports

Although we described the concept already, lets summarize here the three types of supports you see in structures and how they are shown: Note that if in real life the beam had supports like that, in fixed support case, it would not move. In hinge supported case, it would only rotate around hinge, as there […]