Video from my You tube channel

Subscribe to My You tube channel

cracking moment calculation example for inverted T beam

determine the cracking moment for the beam shown in figure 1.
knowing that fc'=27.5 Mpa, and fr=0.7√fc'= 3.67 Mpa=3670kn/m2

Figure 1

the first step is to calculate the neutral axis location

X=moment of area for each part/area of composite section
=((15*45*7.5)+(50*15*40))/(45*15+50*15)=24.56 cm
Figure 2

moment of inertia using parallel axis theorem
the cracking moment will be calculated at the extreme fiber of the tension zone. 
the extreme fiber of tension zone located at 24.56 cm from the neutral axis, y=24.56cm


Popular posts from this blog

Field density test-sand cone method

Example 1: Design of one-way slab

Determinate and indeterminate structure

Pile cap

Zero force member for truss

Tributary area(Loading)

Types of structure

Flakiness Index and Elongation Index of Coarse Aggregates

Cracking moment

Equations of Equilibrium In Structural analysis