Feasibility study for blind-bolted connections to concrete-filled circular steel tubular columns

摘要: The design of structural frameworks for buildings is constantly evolving and dependent on regional issues such as loading constructability. One the most promising recent developments low to medium rise construction in terms efficiency construction, robustness aesthetic appearance utilises concrete-filled steel tubular sections columns a moment-resisting frame. These are coupled rigid or semi-rigid connections composite steel-concrete beams. This paper includes results pilot experimental programme leading towards development economical, reliable that easily constructed this type must provide requisite strength, stiffness ductility suit gravity conditions well combined with governing lateral wind earthquake loading. aim develop stiffer, less expensive easier construct than those current use. A proposed fabricated T-stub connection be used connect beam flanges column. T-stubs connected column using "blind bolts" extensions, allowing installation from outside tube. In general, use extensions dramatic increase strength tension, since load shared between membrane action tube wall anchorage bolts through into concrete.