Video from my You tube channel

Subscribe to My You tube channel

Calculating of cracking moment for hollow rectangular 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 shape is symmetrical. therefore neutral axis located at the center of rectangular X=33.75cm

moment of inertia=(45*67.5^3)/12-(15*22.5^3)/12=1,139,062.5cm^4=0.01139m^4



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