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<p>Lightweight precast shear walls with advanced connection mechanisms offer promising solutions for sustainable and resilient construction. This study evaluates the seismic performance of lightweight Dual Connection Shear Wall systems (DCSWs) incorporating hybrid coupler mechanisms, combining full-grouted vertical anchorage with horizontally oriented threaded continuity. The lightweight concrete matrix utilized 40% areca nut shell aggregate replacement and 1% jute fiber reinforcement, reducing self-weight while enhancing crack-bridging capacity. Experimental cyclic loading tests under varying axial load ratios (0.01–0·04Agfck) demonstrated that axial load significantly influences strength, ductility, energy dissipation, and stiffness degradation. At 0·03Agfck, the wall exhibited optimal seismic behavior with a peak load of 90.46 kN, ductility of 8.6, and cumulative energy dissipation of 92.72 kN-mm, characterized by fuller hysteresis loops and uniform crack distribution. Higher axial compression at 0·04Agfck increased peak load to 100.95 kN but reduced ductility to 8.52 and energy dissipation to 71.02 kN-mm, highlighting the trade-off between strength gain and brittle failure risk. Strain measurements indicated that full-grouted couplers at the base sustained peak strains of 0.0017–0.0018, ensuring anchorage continuity, while horizontal threaded couplers reached 0.0013–0.0015, enabling effective stress transfer and controlled deformability.</p>

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Influence of axial loads on the behavior of lightweight precast shear wall joints under cyclic loading

  • 期刊论文

  • 发表日期：

    2026年3月2日

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  • A. Hemanth Kumar,
  • S. Prakash Kumar,
  • S. Bharanidharan,
  • K. Karthikeyan

摘要

Lightweight precast shear walls with advanced connection mechanisms offer promising solutions for sustainable and resilient construction. This study evaluates the seismic performance of lightweight Dual Connection Shear Wall systems (DCSWs) incorporating hybrid coupler mechanisms, combining full-grouted vertical anchorage with horizontally oriented threaded continuity. The lightweight concrete matrix utilized 40% areca nut shell aggregate replacement and 1% jute fiber reinforcement, reducing self-weight while enhancing crack-bridging capacity. Experimental cyclic loading tests under varying axial load ratios (0.01–0·04Agfck) demonstrated that axial load significantly influences strength, ductility, energy dissipation, and stiffness degradation. At 0·03Agfck, the wall exhibited optimal seismic behavior with a peak load of 90.46 kN, ductility of 8.6, and cumulative energy dissipation of 92.72 kN-mm, characterized by fuller hysteresis loops and uniform crack distribution. Higher axial compression at 0·04Agfck increased peak load to 100.95 kN but reduced ductility to 8.52 and energy dissipation to 71.02 kN-mm, highlighting the trade-off between strength gain and brittle failure risk. Strain measurements indicated that full-grouted couplers at the base sustained peak strains of 0.0017–0.0018, ensuring anchorage continuity, while horizontal threaded couplers reached 0.0013–0.0015, enabling effective stress transfer and controlled deformability.