Experimental Research on Seismic Behavior for Lightweight Aggregate Concrete-Filled Steel Tubular Frame
In order to research the seismic behavior of lightweight aggregate concrete-filled rectangular steel tubular (CFRST) frame, four test specimens were experimentally studied under constant axial load and cyclically lateral load. The form of beam section and steel ratio of column section were considered as experimental parameters. The results show that the lightweight aggregate CFRST frame has plump hysteretic loops without obvious shrinkage phenomenon; the displacement ductility coefficients is between 3.00 and 3.74, which can meet the requirement of ductile frames; the bearing capacity, ductility and energy dissipation capability improve with the increase of the steel ratio; when the steel ratio is the same, the steel beam frames have plumper hysteretic loops, the ductility and energy dissipation capability increase to some extent, the stiffness degradation is slower compared with the CFRST beam frames. Conclusively, the lightweight aggregate CFRST frame has excellent seismic behavior and mechanical performance and there is the value to further research.
C. Y. Gao and B. Li, "Experimental Research on Seismic Behavior for Lightweight Aggregate Concrete-Filled Steel Tubular Frame", Advanced Materials Research, Vols. 163-167, pp. 2194-2198, 2011