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<p>This experimental study evaluates the seismic performance of two vertical connection types in a novel precast grid composite wall structure (PGCWS): a steel bar anchorage (SW-1) and a mortar cushion connection (SW-2). Quasi-static cyclic tests were conducted on 1:2-scale specimens to assess failure modes, hysteretic behavior, stiffness degradation, and energy dissipation capacity. The results indicate that SW-1 maintains structural integrity and facilitates controlled damage distribution, demonstrating ductile failure with an ultimate drift of 1/45.5, stable hysteresis loops, and high energy dissipation (20,400&#xa0;kN mm). In contrast, SW-2 exhibited premature interface slip, resulting in brittle failure characterized by significant hysteresis pinching, rapid stiffness loss, and substantially lower energy dissipation (11,400&#xa0;kN mm), with a limited ultimate drift of 1/66.5. Based on these findings, performance-based design recommendations are proposed. The steel bar anchorage is advised for mid- to high-rise buildings in high-seismic regions due to its robustness and energy dissipation capability. The mortar cushion connection may be suitable for low- to mid-rise structures where construction efficiency is emphasized, provided that inter-story drift is strictly controlled. This research offers essential experimental evidence to support the practical implementation of PGCWS.</p>

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Experimental study on seismic performance of prefabricated grid composite walls with different vertical connection forms

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月4日

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  • Cheng-hua Zhang,
  • Xiao-long Wang,
  • Qing Qin,
  • Liang Cheng,
  • Zhi-gang Gao,
  • Lei Wang,
  • Hua Zhang,
  • Guang-hong Xiong,
  • Chun-lin Shang

摘要

This experimental study evaluates the seismic performance of two vertical connection types in a novel precast grid composite wall structure (PGCWS): a steel bar anchorage (SW-1) and a mortar cushion connection (SW-2). Quasi-static cyclic tests were conducted on 1:2-scale specimens to assess failure modes, hysteretic behavior, stiffness degradation, and energy dissipation capacity. The results indicate that SW-1 maintains structural integrity and facilitates controlled damage distribution, demonstrating ductile failure with an ultimate drift of 1/45.5, stable hysteresis loops, and high energy dissipation (20,400 kN mm). In contrast, SW-2 exhibited premature interface slip, resulting in brittle failure characterized by significant hysteresis pinching, rapid stiffness loss, and substantially lower energy dissipation (11,400 kN mm), with a limited ultimate drift of 1/66.5. Based on these findings, performance-based design recommendations are proposed. The steel bar anchorage is advised for mid- to high-rise buildings in high-seismic regions due to its robustness and energy dissipation capability. The mortar cushion connection may be suitable for low- to mid-rise structures where construction efficiency is emphasized, provided that inter-story drift is strictly controlled. This research offers essential experimental evidence to support the practical implementation of PGCWS.