AMIE INDIA Students Forum

[prayrona]

3.3.1. Use pre-stress force, self weight, and initial loses
3.3.2. Tension limit = 0.530 ksi; compression limit = 3.480 ksi
3.4. Check positive envelope at service I (positive only, negative will be checked under service III)
3.4.1. Use all final moments, and final loses
3.4.2. Compression limit = 4.200 ksi
3.5. Check positive and negative envelope at service III
3.5.1. Use final service III moments, and final loses
3.5.2. Tension limit = 0.530 ksi; compression limit = 2.800 ksi
3.6. Flexural strength
3.6.1. Actual stress in pre-stressing strand under final conditions
3.6.2. Calculate depth of compressive stress block, and therefore determine if rectangular section can be assumed, or if “T” section can be used
3.6.3. Calculate allowable moment and compare it to actual moment
3.7. Reinforcing limits
3.7.1. Maximum reinforcing
3.7.2. Minimum reinforcing
3.7.2.1. Minimum shall be the lesser of 1.2*Mcr or 1.33*the factored moment. That is to say if the allowable moment is < 1.2*Mcr then calculate the required based on 4/3
3.7.2.2. Calculate Mcr based on the AASHTO standard spec method. The LRFD code does not state a method to be used.
3.8. Shear design
3.8.1. List of all code requirements
3.8.2. Required spacing of transverse reinforcement
3.8.2.1. Effective shear depth “dv”
3.8.2.2. Factored moment
3.8.2.3. Resistance factor
3.8.2.4. Force “Vp”, this force is not present because there are not any harped strands
3.8.2.5. Shear stress in the concrete
3.8.2.6. Calculate the maximum spacing of the transverse reinforcing
3.8.2.7. Calculate phi and beta factors
3.8.2.7.1. Strain in the reinforcement
3.8.2.7.2. Factors from table 5.8.3.4.2-1
3.8.2.8. Nominal resistance of concrete
3.8.2.9. Required strength from reinforcing
3.8.2.10. Required stirrup spacing at point of maximum shear
3.8.2.11. Check minimum allowable transverse reinforcing
3.9. Bursting resistance
3.10. Interface shear (horizontal shear)
3.10.1. Code requirements
3.10.2. Nominal shear resistance
3.10.3. Applied shear
3.10.4. Check of all points
4. Mathcad output of all the above
5. Conspan output
6. Details

[charulatha]

hi prayrona,
i think you are posting some notes related to one subject (i.e. civil)
better try to post under one heading (subject) with no. of post. then only it will be helpful for others to download the notes.

calculation-of-steel-t3032.html
how-to-calculate-the-steel-for-rcc-slab-t3033.html
notes-on-concrete-t3031.html

thanks for sharing..