Estimate prestress losses, Civil Engineering

Given:

beam deminsions:
flange width=22"
FLANGE THICKNESS=7"
WEB WIDTH=7"
SECTION HEIGHT=40"

f'c=5000psi
f'ci=3500psi
fpu=270ksi
Ap=eighteen 1/2" diam strands
superimposed load=.85k/ft: 40' simple span
Type I cement; moist cured
Pretensioned beam

Required:

1. Estimate prestress losses at midspan 90 days after release. (elastic shortening,creep,shrinkage,steel relaxation)

Posted Date: 2/23/2013 1:04:20 AM | Location : United States







Related Discussions:- Estimate prestress losses, Assignment Help, Ask Question on Estimate prestress losses, Get Answer, Expert's Help, Estimate prestress losses Discussions

Write discussion on Estimate prestress losses
Your posts are moderated
Related Questions
1. The center line elevation of the proposed roadway at station is 345+25.50 is 327.36-ft.   The existing ground top of cut elevation (ft) is most nearly: 2. A design engineer c

Define Superposition Method  1. Remove enough redundant supports to reduce the structure to a statically determinate condition 2. Calculate the deflections at the previous l

Plants aeration period: Problem: What is the plant's aeration period? Solution The plant's aeration period is the number of hours that the wastewater is aerated

State the natural frequency of a machine foundation of base area 2m × 2m and weight 150 kN, suppose that the soil mass participating in the vibration is 20% of the weight of founda

Calculate the Modulus of elasticity of concrete A pre-stressed concrete beam, having a cross-section of 150 mm width and 400 mm depth, is used over a span of 8 m. Straight tend

Design of prestressed concrete pipes The design of prestressed concrete pipes should cover the following five stages : (a) Circumferential prestressing, winding with or wit

Method of Greasing : Greasing of fixed end requires 20 to 25 minutes. The lifting is hardly 10 mm, ensuring that the gap is created between saddle block and knuckle pin. Saddle is

Advantages of bonded post-tensioning systems Some advantages of bonded post-tensioning systems over unbonded post-tensioning ones are the following : (a) Large reduction in


A city is trying to decide which of two traffic devices to install. Device A costs $1000 and has useful life of five years.  Device A can be expected to result in $300 savings annu