Anchor Tendons Steel section Prestressing of composite steel girders with tendon
Prestressing of composite steel girders with tendon
y万 longitudinal shear longitudinal shear (a)Headed studs (b)Channels longitudinal longitudinal shear shear (e)Bond connectors (c)Bar connectors (d)Tee connectors Some shear connection devices 用于组合梁的连接件形式
Some shear connection devices 用于组合梁的连接件形式
4.2 Beam response and failure modes Simply supported beams are subjected to positive (sagging)moment and shear Typical failure modes for composite beam:critical sections Potential shear failure planes
4.2 Beam response and failure modes • Simply supported beams are subjected to positive (sagging) moment and shear Typical failure modes for composite beam: critical sections. Potential shear failure planes
4.3 Construction methods(施工方法) ·组合梁的工作性能与施工方法有关 Propped construction to support the steel beam until the concrete hardened,(propped at quarter-span points and mid-span);Props are usually left in place until the concrete slab has developed three-quarters of its design strength. .'unpropped construction'casting of concrete without props;Initially,the steel beam alone resists its own weight,and that of the formwork. wet concrete,and placement loads
4.3 Construction methods （施工方法） • 组合梁的工作性能与施工方法有关 • ‘Propped construction ’ to support the steel beam until the concrete hardened, (propped at quarter-span points and mid-span); Props are usually left in place until the concrete slab has developed three-quarters of its design strength. • ‘unpropped construction’ casting of concrete without props; Initially, the steel beam alone resists its own weight, and that of the formwork, wet concrete, and placement loads
B shored h 11112 unshored 6ulpueg Mpl.s 工 deflection Bending moment relationship for unshored(curve A)and shored(curve B)composite beams and steel beam(curve C)
Bending moment relationship for unshored (curve A) and shored (curve B) composite beams and steel beam (curve C)