Abstract：To study the seismic behavior of fabricated steel structural frames with
externally attached composite wall panels (ECWPs), four specimens of semi-rigid
concrete-filled steel tubular (CFST) frames with ECWPs and one specimen of pure
semi-rigid CFST frame subjected to low-cycle reverse loading were tested. The main
investigated parameters were the concrete type of wall panel, the connection type
between walls, the setup of diagonal bracing and the use of wall panel. The
interaction between semi-rigid CFST frames and ECWPs and the corresponding failure
modes under earthquake action were investigated. The hysteretic curves, the
skeleton curves, the degradation curves of strength and stiffness as well as the
energy dissipation capacity were analyzed. Additionally, the structural ductility
was also evaluated in terms of the present specifications. The test results showed
that the semi-rigid CFST frames with bolt connected ECWPs have good hysteretic
behavior, energy dissipation capacity and ductility, so that the collaboration
between semi-rigid CFST frames and ECWPs under strong earthquakes can be
guaranteed; the ductility coefficient μ=2.53~3.81, the elastic ultimate
displacement drift θy=(3.33~5.03)［θe］, and the elastic-plastic ultimate
displacement drift θf=(2.35~2.55)［θp］; the equivalent viscous damping
coefficient ξe=0.147~0.182, and the energy dissipation coefficient E=0.973~1.145.
The damage of composite wall panel mainly occurred near the embedded parts of the
walls, and its overall performance shall be superior to the traditional walls. This
study may provide a good reference for the design theory and the application of the
fabricated steel structures.
