Comparison of the performance of concrete-filled steel tubular and hollow steel diagrid buildings

[摘要] In the recent construction scenario, diagrid structures are becoming a popular high-rise building structural system. Diagrid structures consist of diagonals in the perimeter and an interior core. The corner and interior vertical columns are not required due to the structural efficiency of diagrid structural systems. Steel and concrete are commonly used material for diagrid. An alternate material for diagrid is concrete-filled steel tube (CFST). CFST incorporates the advantages of both steel and concrete. In CFST, the inward buckling of the steel tube is effectively prevented by the filled concrete. The compressive strength of concrete increases due to the tri-axial state of stress in concrete induced by the steel tube. The longitudinal as well as lateral reinforcement to the concrete core is also provided by the steel tube. This paper compares the performance of CFST and steel diagrid buildings using linear static analysis. For this purpose, a 12 storey and 36 storey building are analysed using finite element method and CFST diagrid building is found to perform better.

[发布机构] Department of Civil Engineering, NIT Calicut, India^1

[效力级别] 机械制造

[关键词] Compressive strength of concrete;Concrete-filled steel tubes;Concrete-filled steel tubular;High rise building;Lateral reinforcement;Linear static analysis;Structural efficiencies;Structural systems