<p>In this paper, the precast shear wall connected by Ultrahigh Performance Concrete (UHPC) and dislocated rebars was proposed. Compared to the cast-in-place shear wall, the precast shear wall connected by UHPC and dislocated rebars has a shorter lap-spliced length for connecting rebars, and the splicing accuracy could be ensured. Pseudo-static tests were conducted on three full-scale shear walls, including one cast-in-place and two precast shear walls with lap-spliced length of 6D (rebar diameter) and 10D, respectively. The failure mode, hysteresis curve, skeleton curve, ductility, stiffness degradation and energy dissipation of shear walls under cyclic loading were investigated. The results showed that the precast shear wall with UHPC and dislocated rebars connection had similar peak load to the cast-in-place specimen. However, the hysteretic curve of cast-in-place specimen exhibited greater plumpness and amplitude compared to that of the two precast walls. The shear wall connected by UHPC and dislocated rebars met the ductility demands of the Chinese code and FEMA356. In addition, a finite element (FE) model is established to further investigate the seismic performance of shear walls under different axial load ratios. In general, the precast shear wall connected by UHPC and dislocated rebars demonstrated remarkable seismic performance.</p>

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Investigation on the seismic behavior of precast RC shear walls connected by UHPC and dislocated rebars

  • Zuanfeng Pan,
  • Jiaqi Shang,
  • Jinfan Zhang

摘要

In this paper, the precast shear wall connected by Ultrahigh Performance Concrete (UHPC) and dislocated rebars was proposed. Compared to the cast-in-place shear wall, the precast shear wall connected by UHPC and dislocated rebars has a shorter lap-spliced length for connecting rebars, and the splicing accuracy could be ensured. Pseudo-static tests were conducted on three full-scale shear walls, including one cast-in-place and two precast shear walls with lap-spliced length of 6D (rebar diameter) and 10D, respectively. The failure mode, hysteresis curve, skeleton curve, ductility, stiffness degradation and energy dissipation of shear walls under cyclic loading were investigated. The results showed that the precast shear wall with UHPC and dislocated rebars connection had similar peak load to the cast-in-place specimen. However, the hysteretic curve of cast-in-place specimen exhibited greater plumpness and amplitude compared to that of the two precast walls. The shear wall connected by UHPC and dislocated rebars met the ductility demands of the Chinese code and FEMA356. In addition, a finite element (FE) model is established to further investigate the seismic performance of shear walls under different axial load ratios. In general, the precast shear wall connected by UHPC and dislocated rebars demonstrated remarkable seismic performance.