Abstract
Abstract This study focuses on performance of CFT column to foundation connections subjected to combined axial and lateral cyclic loading. Experimental investigations were carried out on five specimens with exposed column base and embedded column base connections. The parameters considered were number of stiffeners and embedment depth of CFT column. The force - displacement response of all the specimens were compared. Providing increased number of stiffeners, increase the strength of connection. An additional mesh provided on the embedded connection was found to be good in improving the ductility of the connection which is a feasible solution for composite structures in earthquake prone regions.
Highlights
Composite construction is gaining importance and have been widely used now-a-days in the construction industry.The most common types of composite sections are the steel reinforced concrete column (SRC), which is cast by encasing a structural steel section in concrete and the concrete-filled steel tube (CFT) column
Experimental investigation on concrete filled steel tubular column to foundation connections subjected to combined axial and lateral cyclic loading column is partly embedded inside concrete, the base moment is mainly resisted by bearing between the column and the surrounding concrete
The energy absorption has increased around 70% by providing the mesh reinforcement in specimen CFST0.75D-8S-M-05 with exposed column foundation connection specimen CFST-0D-4S-01
Summary
Composite construction is gaining importance and have been widely used now-a-days in the construction industry.The most common types of composite sections are the steel reinforced concrete column (SRC), which is cast by encasing a structural steel section in concrete and the concrete-filled steel tube (CFT) column. Concrete filled steel tubular columns have many advantages and better structural properties, such as high strength under compression loading, enhanced ductile behaviour and good capacity in terms of energy absorption. Experimental investigation on concrete filled steel tubular column to foundation connections subjected to combined axial and lateral cyclic loading column is partly embedded inside concrete, the base moment is mainly resisted by bearing between the column and the surrounding concrete. To evaluate the seismic performance of embedded CFT column-base connections, experiments carried out [Moon et al (2013)]. In the present study, experimental investigation on performance of column foundation connections under lateral cyclic loading was carried out with an aim to propose a new connection with better energy dissipation capacity
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