EXPERIMENTAL STUDY OF SEISMIC PERFORMANCE OF SECTION STEEL-STEEL PLATE CONCRETE COMPOSITE WALL¹⁾

This paper proposes an innovative composite wall, named the section steel-steel plate concrete composite shear wall. The seismic behavior of the composite walls is examined and the results of the quasi-static cyclic tests on the walls designed and machined are presented. The failure mechanism, the hysteretic behavior, the stiffness degradation and the energy dissipating capacity are investigated under various axial load ratios and shear span ratios．The test results indicate that the specimens fail in a flexural mode, the steel tubes are torn on the front and the side, characterized by the local buckling of the boundary steel plates and the compressive crushing of the concrete at the wall base．For the composite walls, the plastic deformation ability and the energy dissipation capacity are improved with the increase of the axial load ratios, while the shear span ratio has less effect.