Abstract
Prefabricated shear walls have been widely used in engineering structures. Vertical connection joints of the walls are the key to ensure the safety of the structures. Steel–concrete composite structures have been proved to have a good bearing capacity and ductility. In this paper, a new type of prefabricated structure is proposed, in which vertical wall members are connected together through built-in steel sections and cast-in-place concrete. This paper studies the seismic performance of the proposed prefabricated concrete shear wall structure. Hysteretic curves and skeleton curves of the shear wall are obtained based on experimental analyses. A dimensionless skeleton curve model is developed using the theory of material mechanics and the method of regression analysis. A stiffness calculation method for different loading stages is obtained and a restoring force model is proposed. The proposed innovative prefabricated shear wall structure provides good resistance to seismic performance and the related analysis provides a fundamental reference for studies of prefabricated shear wall structures.
Highlights
Shear wall structures have been widely used in multistory and high-rise residential and commercial buildings
The resilience of structures has been evaluated using restoring force models that reflect the relationship between the load and displacement of structures under cyclic loading and measure the ability of shear walls to recover their original shape after an earthquake event
It is observed that stiffness calculation methods of different types of shear walls have been developed, including research on the resilience models of prefabricated concrete shear walls, no research has been conducted on restoring force models of prefabricated concrete shear walls with built-in steel sections
Summary
Shear wall structures have been widely used in multistory and high-rise residential and commercial buildings. Because of the importance of the connections of fabricated wall components, studies on the performance of prefabricated shear walls with different types of connections are reviewed and summarized below with a focus on shear walls reinforced with steel sections and restoring force models. J [4] developed a cyclic restoring force model of fiber-reinforced concrete shear walls in high-rise building structures. [17] developed a cyclic restoring force model for high-strength foamed concrete (HFC)-filled cold-formed thin-walled steel (CFS) shear walls based on experimental studies, which investigated the characteristics of hysteretic and skeleton curves. It is observed that stiffness calculation methods of different types of shear walls have been developed, including research on the resilience models of prefabricated concrete shear walls, no research has been conducted on restoring force models of prefabricated concrete shear walls with built-in steel sections. The compressive strength test of concrete cubes (3 cubes) was carried out on a universal testing machine with an electro-hydraulic servo controlled by a microcomputer (WAW2000), and the mean value of the axial compressive strength of concrete cubes was 35.39 MPa on the 28th day with moist curing
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