Analytical Investigation on Concrete Filled Double-Skinned Steel Tubular Column Composite Frame With Bolted End-Plate Connections

摘要

Simulation studies of seismic behaviour of bolt-endplate connected composite structural systems consisting of CFDST columns and steel beams frame with reinforced concrete slabs are presented in this paper. Based on fiber-section model, analytical models were developed to predict the elastic-to-plastic behaviour of the prototype frame. Analysis results indicated that the structural behaviour under the simulated seismic loadings was consistent with the expected performance objects for different earthquake hazard levels corresponding to current seismic design codes, implying that effective seismic performance of composite CFDST frame with bolted connections can be achieved. The primary analytical simulation shows the suggested bolted endplate CFDST system has the potential to offer appropriate strength and adequate stiffness for buildings located in areas of high earthquake intensity, and provides basic information for further experimental researches to validate the seismic performances of the bolted end-plate CFDST structures.