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<p>In response to the challenges of prolonged construction cycles, high costs, and environmental degradation associated with coal-pressed village reconstruction projects in northern Shaanxi mining areas. The study proposes a monolithic assembled concrete shear wall structure with non-connected vertical distribution reinforcement (SGBL monolithic assembly shear wall structure). The structural system employs non-continuous reinforcement in prefabricated wall elements, using extrusion grouting connections combined with cast-in-place boundary members, optimizing construction efficiency and enhancing environmental sustainability. To evaluate its seismic performance, five scaled specimens with low shear-span ratios were designed and analyzed through refined finite element models under cyclic loading. Key parameters influencing failure modes were systematically investigated. The findings reveal that: Specimens transition from flexural-shear failure to shear-dominated failure as the shear-span ratio decreases; Increased shear-span ratio reduces load-bearing capacity while enhancing structural ductility; Wall thickness variations exhibit limited impact on performance, whereas openings reduce load capacity but improve ductility; Effective composite action between precast panels and cast-in-place boundary elements with intact vertical connections demonstrates superior seismic performance. These research outcomes provide theoretical foundations and technical support for implementing this advanced structural system in urban–rural residential constructions within coal mining regions of northern Shaanxi.</p>

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Seismic performance of monolithic shear walls with disjointed steel bars in the northern Shaanxi

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年7月1日

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  • Jun Peng,
  • Zhiqi Li,
  • Hairen Wang,
  • Xiangyu Li

摘要

In response to the challenges of prolonged construction cycles, high costs, and environmental degradation associated with coal-pressed village reconstruction projects in northern Shaanxi mining areas. The study proposes a monolithic assembled concrete shear wall structure with non-connected vertical distribution reinforcement (SGBL monolithic assembly shear wall structure). The structural system employs non-continuous reinforcement in prefabricated wall elements, using extrusion grouting connections combined with cast-in-place boundary members, optimizing construction efficiency and enhancing environmental sustainability. To evaluate its seismic performance, five scaled specimens with low shear-span ratios were designed and analyzed through refined finite element models under cyclic loading. Key parameters influencing failure modes were systematically investigated. The findings reveal that: Specimens transition from flexural-shear failure to shear-dominated failure as the shear-span ratio decreases; Increased shear-span ratio reduces load-bearing capacity while enhancing structural ductility; Wall thickness variations exhibit limited impact on performance, whereas openings reduce load capacity but improve ductility; Effective composite action between precast panels and cast-in-place boundary elements with intact vertical connections demonstrates superior seismic performance. These research outcomes provide theoretical foundations and technical support for implementing this advanced structural system in urban–rural residential constructions within coal mining regions of northern Shaanxi.