Reinforced Conrete Design

Question 1

Design new doubly reinforced beam?

Answer 1

Draw Section
d’/d Check & Chart
Equation [C1]
Force Diagram
Equations [C9-12]
Rebar Selection

Question 2

Analysis of existing doubly reinforced beam?

Answer 2

Force Diagram
d’/d Check & Chart
Force Equations to find x
(x<225 limit)
Check if fsc has yielded
Force equations with new values
Maximum moment capacity

Question 3

Design of new T-Beam?

Answer 3

Draw Slab/Beam system
Loading analysis
Draw BMD and SFD
Spec (cover/bond)
Calculate effective slab bredth
Determine N/A position

Question 4

Analyis of existing T-Beam?

Answer 4

Draw force diagram
Assume only flange in compression
Force equations
Fccw<Fst
OR //
Fccw>Fst

Question 5

Punching shear stress design

Answer 5

Draw slab
Calculate column perimeter
Calculate applied shear (Ved) < 4.5
Establish control perimeter (2d)
Calculate shear at control perimeter
Use chart A to establish if shear links required
Determine outer perimeter
Calculate area of reinforcement needed & no of legs
Detail

Question 6

Column design?

Answer 6

Draw column profile
Find out if minor or major axis dominates
d’/h to find out which chart (d’=46mm)
Calculations for each axis
Get required area of rebar

Question 7

Design new slab

Answer 7

Draw loads and spans
Specs to get h and d. (L/d = 25 initial)
Analyse loading (1.35DL + 1.5LL)
Draw BMD and SFD
Bending to find As [C3-C5] for each moment
Compare to minimum (0.135%bd)
Shear calculation (Ved/0.9bd)
Check for punching shear
Details

Question 8

Beam shear check?

Answer 8

Draw SFD, BMD and curtailment
Calculate shear stress (shear force/0.9bd)
Charts A, B, C, D
Calculate minimum links (Asw & S)
Transition and curtailment of links