Cracking Moment of Reinforced Concrete Beams - Gross Section vs Transformed Section
Ғылым және технология
In this video, we focus on the first uncracked phase of bending in a reinforced concrete beam. We compute the cracking moment and curvature and cracking using two different approximations:
(1) Gross section - ignore the steel, use concrete only
(2) Transformed section - transform the steel area into equivalent concrete area
The gross section approximation is often used in design, as it is close enough and conservative, but the transformed section may give a more accurate solution.
Chapters:
0:00 Flexure in RC
0:41 Gross vs Transformed
2:30 Gross Discussion
5:54 Gross Example
10:56: Transformed Discussion
14:17 Transformed Example
Пікірлер: 6
Hi Professor, Thanks for the video as always. Was wondering in practice where the cracked moment comes into play? It seems that engineer's are almost always focused on the reinforced design moment strength.
@StructuresProfH
Ай бұрын
The cracking moment is typically only used for serviceability concerns (i.e., deflections). When estimating deflections of concrete beams, the moment of inertia will change depending on whether the beam is cracked or uncracked. I have another video on that topic: kzread.info/dash/bejne/nH1q2dmjktyffdY.html
Thank you, Sir, your lecture is very helpful
@StructuresProfH
9 ай бұрын
You are most welcome!
thank u sir 🙏 🙌 ❣❣❣
@StructuresProfH
Жыл бұрын
You are most welcome!