同济大学：《钢和混凝土组合结构设计原理与应用》课程教学资源（教案讲义）Chapter 5 Shear Connection 组合梁的抗剪连接

Chapter 5 Shear Connection 组合梁的抗剪连接 By Professor Shiming Chen Lecture Notes for Presentation 2013

Chapter 5 Shear Connection 组合梁的抗剪连接 By Professor Shiming Chen Lecture Notes for Presentation 2013

SUMMARY The forces in a typical composite beam are reviewed and their action on the connectors is described. Several basic forms of connectors are introduced. Design values for ultimate strength and their experimental evaluation Full connection is explained together with the use of reductions of connector strength by recourse to moment interaction diagrams

SUMMARY • The forces in a typical composite beam are reviewed and their action on the connectors is described. • Several basic forms of connectors are introduced. • Design values for ultimate strength and their experimental evaluation • Full connection is explained together with the use of reductions of connector strength by recourse to moment interaction diagrams

5.1 Introduction Shear connection is an important feature in steel- concrete composite construction抗剪连接件是将钢梁与混 凝土板组合在一起共同工作的关键部件。 .If slip at the interface is free to occur,each component (steel beam/concrete slab)will act independently. .If slip at the interface is eliminated,the slab and steel beam will act together as a composite unit.The resulting increase in strength and stiffness depends on the extent to which slip is prevented. .The use of mechanical shear connectors is essential for the satisfactory performance of composite beams

5.1 Introduction Shear connection is an important feature in steel￾concrete composite construction 抗剪连接件是将钢梁与混 凝土板组合在一起共同工作的关键部件。 •If slip at the interface is free to occur, each component (steel beam/concrete slab) will act independently. •If slip at the interface is eliminated, the slab and steel beam will act together as a composite unit. The resulting increase in strength and stiffness depends on the extent to which slip is prevented. •The use of mechanical shear connectors is essential for the satisfactory performance of composite beams

Endslip Na endslip Wo0m Na interaction Partial interaction Complete interaction 汤☑ Composite steel beam and concrete slab interaction 混凝土板与钢梁的相互作用

Composite steel beam and concrete slab interaction 混凝土板与钢梁的相互作用

入 Elastic stress --------Ultimate plastic stress Beam section a)No connection Bending stress Shear stress b)Full connection 组合梁与非组 合梁截面上的 应力分布 Strain Bending stress Shear stress

组合梁与非组 合梁截面上的 应力分布

The Shear Transfer Mechanisms-General adhesion and chemical bond 。interface friction mechanical interlock ·dowel action

The Shear Transfer Mechanisms-General • adhesion and chemical bond • interface friction • mechanical interlock • dowel action

JACK LOAD WITH LOAD CELL CRACK INDUCER DEFLECTION TRANSDUCER a END SLIP TRANSDUCER P[kN].s[mm] P[kN] 100 50 80 Edge studs 60 5019 40 民古脚响 3819 20 10 20 40 60 80 100 0 0 80120 160 6[mm] b) Shear transfer mechanism. Fc+AFc c+AFc

好疗生 SHOT-FIRED WELDED STUD PINS CONNECTOR CHANNEL ANGLE FRICTION GRIP BOLT T-CONNECTOR HORSESHOE C-CONNECTOR BAR CONNECTOR Typical shear connectors

0 q/qu.max 19x100mm 1.0 0.8 0.6 19x75mm 0.4 0.2 0.5 1.0 1.5 2.0 2.5 s [mm] a) b) Test on shear connectors. (a)Push-out specimen.(b)Non dimensional load-slip relationship

Test on shear connectors. (a) Push-out specimen. (b) Non dimensional load-slip relationship

开孔钢板连接件一受力方向焊接的开孔钢板 PBS(Perfobond Strip) *抗剪刚度大，抗疲劳性能好 ● *圆孔中贯通钢筋，抗剪强度增大 *焊接容易 00000000000090

•◆ 开孔钢板连接件—受力方向焊接的开孔钢板 PBS (Perfobond Strip) • *抗剪刚度大，抗疲劳性能好 • *圆孔中贯通钢筋，抗剪强度增大 • *焊接容易