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<p>This study investigates the impact of construction methods and engineered cementitious composites (ECC) on the seismic performance of cavity walls through pseudo-static tests on six specimens. Additionally, the N2 method is employed to evaluate the peak ground acceleration (PGA) of the specimens, and a formula is proposed for calculating the lateral bearing capacity of ECC-strengthened cavity walls. The results indicate that the construction method significantly affects the seismic performance of cavity walls, whereas its influence on ECC-strengthened cavity walls is negligible. The ECC overlay scheme demonstrates superior efficacy compared to the ECC strip scheme in improving the seismic performance of cavity walls. The ECC overlay scheme increases the cracking load, ultimate load, deformation capacity, ductility, energy dissipation capacity, and PGA of one-ply stand bricks one-ply lie bricks cavity walls and three-ply stand bricks one-ply lie bricks cavity walls by 183% and 255%, 93% and 244%, 75% and 161%, 53% and 75%, 477% and 742%, and 132% and 391%, respectively. Additionally, it transforms the failure mode of cavity walls from shear failure to flexural-shear failure. The proposed formula for calculating the lateral bearing capacity of ECC-strengthened cavity walls demonstrates a deviation of less than 18% when compared to experimental results, confirming its reliability.</p>

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Experimental Investigation on Seismic Performance of Cavity Wall Strengthened with Engineered Cementitious Composites

  • 期刊论文

  • 发表日期：

    2025年5月5日

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  • Liangyi Zhang,
  • Tiegang Zhou

摘要

This study investigates the impact of construction methods and engineered cementitious composites (ECC) on the seismic performance of cavity walls through pseudo-static tests on six specimens. Additionally, the N2 method is employed to evaluate the peak ground acceleration (PGA) of the specimens, and a formula is proposed for calculating the lateral bearing capacity of ECC-strengthened cavity walls. The results indicate that the construction method significantly affects the seismic performance of cavity walls, whereas its influence on ECC-strengthened cavity walls is negligible. The ECC overlay scheme demonstrates superior efficacy compared to the ECC strip scheme in improving the seismic performance of cavity walls. The ECC overlay scheme increases the cracking load, ultimate load, deformation capacity, ductility, energy dissipation capacity, and PGA of one-ply stand bricks one-ply lie bricks cavity walls and three-ply stand bricks one-ply lie bricks cavity walls by 183% and 255%, 93% and 244%, 75% and 161%, 53% and 75%, 477% and 742%, and 132% and 391%, respectively. Additionally, it transforms the failure mode of cavity walls from shear failure to flexural-shear failure. The proposed formula for calculating the lateral bearing capacity of ECC-strengthened cavity walls demonstrates a deviation of less than 18% when compared to experimental results, confirming its reliability.