Welcome To The Presentation Based On T-beam :WSD Method Singly And

Doubly Reinforced

• Course Tile: Pre-stressed Concrete Sessional

• Course No. :CE 416

Presented by

Md. Muntasir Rahman

ID No. :10.01.03.045

T Beam

• Monolithically casted slab, part of slab act as a part of beam

• Resist longitudinal compression force in a positive moment zone and from a T-section

Figure : T beam

Taction

Where positive bending

moment occurs

Why T Beam occurs in +ve moment zone

In +ve moment zone T.Z situated in bottom part

and C.Z occurs in Top part .So ,The extra part

of slab Strengthen the C.Z

Type Based on Effective Flange Width

Type Based on Effective Flange Width

1)Beam having slabs on both sides

2)Beam having slabs on one side

3) Isolated beam

WSD method

The Design load is Actual load

Structure’s nominal Stress all should be in the elastic limit

Steel Sress strain curve

The material Stress must be in the elastic zone

WSD method

In WSD Method , Stress diagram always linear

Singly And Doubly Reinforced beam

From previous figure

• In singly Beam rebar is only in the tension zone

• doubly reinforcement is in both tension and compression zone ,because it can not develop the compressive force to resist the maximum moment .so, Additional rebar is added in the C.Z

Design Procedure

Design Procedure

Design procedure

Design procedure