Continuous Beam Quiz 2

How does the design of main reinforcements contribute to the design procedure of a continuous beam?

• It provides structural support

• It determines nominal cover

• It calculates design load

• It checks for cracks

What is the primary function of the web in the diagram?

• To provide vertical support

• To connect flanges and resist shear forces

• To increase the length of the beam

• To enhance the aesthetic appearance

Which section should be referred to for the protection of steel against corrosion?

• Section 4

• Section 7

• Section 8

• Section 9

What is the main focus of the document regarding concrete construction?

• Cost reduction

• Aesthetic improvement

• Safety and compaction

• Speed of construction

LABEL THIS DIAGRAM CORRECTLY

a

b

c

d

e

f

Outer Support

Near Middle of End Span

At Middle of Interior Span

Interior Support

At Interior Support

1st Interior Support

a

b

c

d

Fst

Fcc

0.567fck

Z=(d-0.4x)

STRESS BLOCK FOR FLANGE BEAM

Neutral axis below flange (M > Mf) – singly reinforced section

a

b

c

d

e

f

g

Fcc1

Fcc2

0.567fck

Z1

0.87fyK

Fst

Z2

Effective width (beff or bf)

a

b

c

d

e

f

beff

b1

b2

beff1

b

beff2

Design procedure of cont. beam

• Determination of the effective width

• Analysis of bending moment and shear force

• Determination of the nominal cover

• Calculation of the effective depth

• Design of main reinforcements

Label below following BM and SF from Table 3.5

a

b

c

d

e

f

g

h

V=0.55F

V=0.45F

Mmidspan=0.09Fl

V=0.6F

Msup=0.11Fl

Mmidspan=0.07Fl

M=0

Msup=0.08Fl