Chapter 4 Steel and concrete composite beams Simply supported composite beams 钢-混凝土组合梁1—简支组合梁 By Professor Chen Shiming Lecture Notes for Presentation 2013
Chapter 4 Steel and concrete composite beams Simply supported composite beams 钢-混凝土组合梁 1 ——简支组合梁 By Professor Chen Shiming Lecture Notes for Presentation 2013
4.1 Introduction In buildings/bridges it is common to find concrete slabs supported on steel beams.If slip at the interface is eliminated,or at least reduced,the slab and steel member will act together. In practice,such action is achieved by studs or other connectors which are welded to the structural steel and embedded in the concrete slab. A composite beam has greater stiffness and generally a higher load capacity than its non- composite counterpart.Consequently,a smaller steel section is usually required
4.1 Introduction • In buildings/bridges it is common to find concrete slabs supported on steel beams. If slip at the interface is eliminated, or at least reduced, the slab and steel member will act together . • In practice, such action is achieved by studs or other connectors which are welded to the structural steel and embedded in the concrete slab. • A composite beam has greater stiffness and generally a higher load capacity than its noncomposite counterpart. Consequently, a smaller steel section is usually required
Composite beams (a)I-shape steel section. (b)Hollow steel section
Composite beams
Steel encased composite sections Rotate top halves about these positions Cutting pattern Shear connectors A Composite slab A Variable sized duck opening Service ducting Composite castellated beams. Section A-A
Steel encased composite sections
Prestressed Composite Beams a) b) d III工工 e)
Prestressed Composite Beams