Prestressed Concrete intro

# Prestressed Concrete intro - =-0.666-1.4909 0.0247=-2.13...

This preview shows pages 1–2. Sign up to view the full content.

Prestressed Concrete Assuming the following : Area of reinforcement =774 mm 2 f’c = 35 MPa P=1.1 GPa Section Properties : I=(1/12)x30x55 3 =415937.5 cm 4 . A=30x50=1650 cm 2 Total loads on beam=3T/m Beam weight =23.5KN/m 3 *0.3*0.55=3.8775 KN/m M=wl 2 /8=30000*12 2 /8=540 KN.m Stresses at beam Centerline : f top= - + PA PecI - =- . * + . * * . * . . - * . . McI 1 1 1031650 1 1 103 20 5 27 5415937 5 540 27 5415937 5 f top =-0.666+1.4909-0.0357=0.789 MPa. f bot

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: =-0.666-1.4909+0.0247=-2.13 MPa. Stresses at beam ends : f top =-0.666+1.4909=0.824 MPa. f bot =-0.666-1.4909=-2.156MPa. Deflection Immediately after cables are cut : D due to cable = -=- . * . * * . *( * ) * * . Pel^28EI 7 74 1 1 103 20 5 12 100 ^28 27800 415937 5 = -2.716 cm D due to beam = = * . *( * ) * * . 5wl^4384EI 5 3 8775 12 100 ^4384 27800 415937 5 = 6.338 cm...
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

Prestressed Concrete intro - =-0.666-1.4909 0.0247=-2.13...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online