Explain how to solve \ \ Problem (1)\ Design the sections below for the provided required strength

(\\\\Mu )

. Note that section has a block-out (a void) for electrical conduit. Compute As,

max

and determine

\\\\phi Mn

provided by this

As

, max. If

\\\\phi Mn

is less than

\\\\Mu

, design the sections as doubly reinforced. Select the bars, calculate the actual effective depths, and

\\\\phi Mn

. Check the strains in tension and compression reinforcement. Use normal weight concrete with

fc^(')=24MPa,fy=414MPa,\\\\phi 10

bars for shear reinforcement,

50mm

clear cover,

\\\\Mu =

675 kN.m.\ first assume of

d=h-100,d^(')=72.5mm

\ (10 Marks)\

100mm150mm100mm

Problem (1) (10 Marks) Design the sections below for the provided required strength (Mu). Note that section has a block-out (a void) for electrical conduit. Compute As, max and determine Mn provided by this As, max. If Mn is less than Mu, design the sections as doubly reinforced. Select the bars, calculate the actual effective depths, and Mn. Check the strains in tension and compression reinforcement. Use normal weight concrete with fc=24MPa,fy=414MPa,10 bars for shear reinforcement, 50mm clear cover, Mu= 675kN.m. first assume of d=h100,d=72.5mm