Abstract
Two specimens of nonductile reinforced concrete (RC) frame (ND-1) and nonductile RC frame retrofitted by corrugated steel plate shear walls slotted with columns (ND-2) are established by finite element. These specimens have same dimensions and steel skeletons. Finite element models had been verified by the existing experimental results. The hysteresis curves, skeleton curves, ductility, and stiffness curves of Specimen ND-1 and Specimen ND-2 are compared. The results show that the reinforcement effect is significant. Twenty-four models are built to study the seismic behavior on different influence parameters. The parameters are slit width, thickness of corrugated steel plate shear walls, concrete strength of nonductile RC frame, and boundary conditions of corrugated steel plate shear walls at slotted parts. The results indicate that the strength is declined with the increase of slit width. With the increase of thickness and concrete strength, the strength and stiffness are enhanced. The strength is larger with the boundary than without. Slit width and thickness have an important impact on the stiffness. Concrete strength and boundary conditions have little impact on stiffness. The strengthened nonductile RC frames have enough ductility.
Highlights
In earthquake zones of China, there were number of older, low-rise concrete buildings which have not been retrofitted for earthquake safety. ese two-storey to five-storey structures may meet the old building-code standards
It indicated that the strength had been improved 100.76% when the nonductile RC frame was strengthened with corrugated steel plate shear walls. e ductility was improved from 2.86 to 3.67
Boundary conditions of corrugated steel plate edge at slotted parts were related Specimens ND-5, ND-6, ND-7, ND-8, ND-9, ND-10, ND-22, and ND-23. e selected slit width was on the basis of Zhao [20] team research. e thickness of corrugated steel plate shear walls was divided into 0.4 mm, 0.6 mm, and 0.8 mm
Summary
In earthquake zones of China, there were number of older, low-rise concrete buildings which have not been retrofitted for earthquake safety. ese two-storey to five-storey structures may meet the old building-code standards. In earthquake zones of China, there were number of older, low-rise concrete buildings which have not been retrofitted for earthquake safety. Ese two-storey to five-storey structures may meet the old building-code standards. New building codes reflected later earthquake engineering research and incorporated structural elements that allowed concrete buildings to bend and stretch a bit during earthquakes. Some scholars [1,2,3,4,5,6,7,8,9] have studied the seismic performance of nonductile frame structures and corrugated steel plate shear walls. Wu et al [10] developed a multiscale model of nonductile frame. E hysteresis curves and skeleton curves of nonductile frame were analyzed by the developed model. Sae-Long et al [11] proposed a fiber frame element for nonductile RC columns
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