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This article presents an experimental study on seismic performance of three reinforced concrete frames. Three 1/3-scale, one-bay, two-story specimens are constructed and tested in the test. One specimen is bare; another is reinforced by profiled steel sheet shear walls; the third one is filled with infill walls and reinforced by profiled steel sheet shear walls. Experiment investigates some characteristics of three test specimens, such as strength, stiffness, and energy dissipation. Test results show that these characteristics of infilled frame structure have been improved prominently. Comparing with the bare and the second specimen, the strength is enhanced by 307.3% and 109.28%, the stiffness is increased by 103.17% and 12.27%, and cumulative energy is improved by 291.37% and 106.45%, respectively. The results indicate that profiled steel sheet shear walls can cooperate with infill walls effectively and improve seismic performance of reinforced concrete frame structure significantly. The seismic strengthening method, profiled steel sheet shear walls reinforce infilled frame structures, is proved to be efficient.

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This paper presents experimental and analytical investigations of infilled reinforced concrete (RC) frames with steel corrugated shear walls. In the experimental study, two 1/3-scale, one-bay, two-storey specimens were constructed and tested under cyclic load reversals. One specimen was bare, for comparison. Properties affecting seismic performance, such as strength and stiffness of the two specimens, were investigated. However, owing to the inherent complexity of the infilled RC frame and the unique features of the steel corrugated shear walls, the experimental investigation was not sufficient to fully explain the influence of several parameters. Therefore, an analytical investigation based on finite-element models using ANSYS was conducted. Validation of the finite-element models against the experimental results showed good agreement. Critical parameters influencing the behaviour of steel corrugated shear walls, such as thickness and orientation of corrugated sheets, were varied, and the effects on seismic behaviour discussed.

Abstract:In order to investigate the seismic performance of reinforced concrete frame with unequal span, a specimen was tested under low-cyclic loading and the seismic performance of this frame was analyzed based on fiber element method using software OpenSees. Hysteretic curves, skeleton curves, ductility, stiffness degradation and energy dissipating capacity of the frame are compared and analyzed. The experimental and simulate results demonstrate that this frame has a poor seismic performance. Thus, it is suggested that the seismic strengthening criteria of unequal-span frame structure should be raised and the existing buildings of this structure should be retrofitted.