Lecture _3

65562602

(Reinforced Concrete Design)

Phakin Loyjaroen Reinforced Concrete Design

1 2552 .

3(Reinforced concrete beam design)

(Load Transferred to Beam from Slab)

(Load Transferred to Beam from Slab)

(Load Transferred to Beam from Slab)

Tributary area = (m =S/L < 0.5) B1 = (Secondary Beam) B3 = (Primary Beam) Span B3

(Load Transferred to Beam from Slab)

Tributary area = 0.5SL sq.m Load on beam = 0.5wSL kg/m Floor load = w kg/sq.m

(Load Transferred to Beam from Slab)

Two-way Slab Span ratio m = S/L

(Load Transferred to Beam from Slab)

(Two-way Slab) Span ratio m = S/L

(Short span (BC)): (Floor load) = w kg/sq.m (Tributary area) = S2/4 sq.m (Load on beam) = wS/4 wS/3 kg/m

(Load Transferred to Beam from Slab)

(Two-way Slab) Span ratio m = S/L

(Long span (AB)): (Floor load) = w kg/sq.m (Tributary area) =

(Load on beam) =

(Load Transferred to Beam from Slab)

50 10.30 . 2 ..2547 11 1 2-4 10 8

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

ACI

(Continuous Beams and One-way Slabs)

ACI

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

(Continuous Beams and One-way Slabs)

2 (spandrel beams) ( ) 1.5 T/m. 3 T/m. 2 ABC

(Continuous Beams and One-way Slabs)

1) 2) LL/DL = 3/1.5 = 2 < 33) (L2-L1)/L1 = (6.5-6)/6 = 0.083 < 0.2

(Continuous Beams and One-way Slabs)

(Location of Reinforcement)

(Location of Reinforcement)

(Location of Reinforcement)

(Location of Reinforcement)

(Location of Reinforcement)

(Location of Reinforcement)

(Location of Reinforcement)

(Behavior of Beam under Load Working Stress Conditions)

(Behavior of Beam under Load Working Stress Conditions)