Abstract
This study aimed to study the cyclic behavior of two-side-connected precast-reinforced concrete infill panel (RCIP). A total of four RCIP specimens with different slit types and height-to-span ratios modeled at a one-third scale were tested subjected to cyclic lateral loads. The failure mode, hysteretic behavior, lateral strength, stiffness degradation, ductility, and energy dissipation capacity of each RCIP specimen were determined and analyzed. The specimens experienced a similar damage process, which involved concrete cracking, steel rebar yielding, concrete crushing, and plastic hinge formation. All the specimens showed pinched hysteretic curves, resulting in a small energy dissipation capacity and a maximum equivalent viscous damping ratio lower than 0.2. The specimens with penetrated slits experienced ductile failure, in which flexural hinges developed at both slit wall ends. The application of penetrated slits decreased the initial stiffness and lateral load-bearing capacity of the RC panel but increased the deformation capacity, the average ultimate drift ratios ranged from 1.41% to 1.99%, and the lowest average ductility ratio reached 2.48. The specimens with high-strength concrete resulted in a small slip no more than 1 mm between the RC panel and steel beam, and the channel shear connectors ensured that the RC infill panel developed a reliable assembly with the surrounding steel components. However, specimens with concealed vertical slits (CVSs) and concealed hollow slits (CHSs) achieved significantly higher lateral stiffness and lateral strength values. Generally, the specimens exhibited two-stage mechanical features. The concrete in the CVSs and CHSs was crushed, and flexural plastic hinges developed at both ends of the slit walls during the second stage. With increasing concrete strength, the initial lateral stiffness and lateral strength values of the RCIP specimens increased. With an increasing height-to-span ratio, the lateral stiffness and strength of the RC panels with slits decreased, but the failure mode remained unchanged.
Highlights
Traditional reinforced concrete (RC) shear walls typically act as the main lateralresistant seismic components of high-rise buildings in seismic regions because they possess high lateral stiffness and lateral load-bearing capacity
A two-story single-bay steel frame infilled with high-performance fiber-reinforced concrete infill panels has been analyzed through hybrid simulation [15], and it was found that the retrofitting effectively improved the energy dissipation capacity
This paper presents a new slit type—a hollow concealed vertical slit—which is realized by introducing the foam board
Summary
Traditional reinforced concrete (RC) shear walls typically act as the main lateralresistant seismic components of high-rise buildings in seismic regions because they possess high lateral stiffness and lateral load-bearing capacity. Smith [1] experimentally investigated the mechanical behavior of an infilled steel frame without shear connectors through monotonic loading tests using 42 small-scale specimens. Based on the studies mentioned above, Sun et al [20,21] developed a novel RC shear wall with unpenetrated concealed vertical slits (CVSs), i.e., a thin concrete wall was placed in the seams between parallel slit walls This novel reinforced concrete infill wall (RCIW) with CVSs was embedded in the PR steel frame, and a series of cyclic tests were performed. A total of four RCIWs with different slits and height-to-span ratios were designed and subjected to cyclic loads, and the seismic behavior, including the hysteretic curve, lateral strength, stiffness degradation, energy dissipation, and interface slip, were analyzed and compared.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
