Scholarlink

<p>While precast concrete wall systems with rigid steel connections have been extensively studied, research on ductile connections for such systems remains limited. This study proposes a multi-story precast concrete wall-frame system featuring steel hinged connections between beams, columns, and wall panels. The hinge joints at the both ends of walls to the beams induce a controlled rocking behavior for the wall panels, enhancing system flexibility. To further improve seismic performance of the proposed system, two options of steel and hybrid SMA-steel ring dampers are incorporated at the wall corners, activating under rocking motion to dissipate energy. The structural behavior of the proposed system, with various wall panel numbers in each story, is compared to the conventional reinforced concrete wall system for 2-, 6-, and 10-story buildings. For this purpose, extensive numerical models are developed and validate against experimental data. Nonlinear cyclic and time-history analyses demonstrate that the steel ring damper configuration for the proposed system increases energy dissipation by up to 116% compared to conventional reinforced concrete walls. The hybrid SMA-steel dampers provide both self-centering capability and sufficient energy dissipation. Drift reductions of up to 37% are achieved in systems with four small wall panels and steel dampers, though differences between steel and hybrid dampers are marginal (&lt; 10%) for mid-rise buildings. All proposed configurations reduce floor accelerations by up to 62% relative to conventional systems. Notably, the hybrid ring damper wall system reduces residual drift by 90%, significantly improving reparability for low- to mid-rise structures. These findings demonstrate the proposed system’s potential to enhance seismic resilience, achieving an optimal balance of flexibility, energy dissipation, and self-centering in precast concrete construction—particularly when multiple small wall panels and hybrid SMA-steel ring dampers are employed.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Seismic performance of rocking precast concrete walls with adaptive ring dampers: a low-damage system with enhanced flexibility and self-centering capabilities

  • 期刊论文

  • 发表日期：

    2026年6月22日

查看全文
  • Oday Jawad Kadhim,
  • Mojtaba Fathi,
  • Afshin Naserpour

摘要

While precast concrete wall systems with rigid steel connections have been extensively studied, research on ductile connections for such systems remains limited. This study proposes a multi-story precast concrete wall-frame system featuring steel hinged connections between beams, columns, and wall panels. The hinge joints at the both ends of walls to the beams induce a controlled rocking behavior for the wall panels, enhancing system flexibility. To further improve seismic performance of the proposed system, two options of steel and hybrid SMA-steel ring dampers are incorporated at the wall corners, activating under rocking motion to dissipate energy. The structural behavior of the proposed system, with various wall panel numbers in each story, is compared to the conventional reinforced concrete wall system for 2-, 6-, and 10-story buildings. For this purpose, extensive numerical models are developed and validate against experimental data. Nonlinear cyclic and time-history analyses demonstrate that the steel ring damper configuration for the proposed system increases energy dissipation by up to 116% compared to conventional reinforced concrete walls. The hybrid SMA-steel dampers provide both self-centering capability and sufficient energy dissipation. Drift reductions of up to 37% are achieved in systems with four small wall panels and steel dampers, though differences between steel and hybrid dampers are marginal (< 10%) for mid-rise buildings. All proposed configurations reduce floor accelerations by up to 62% relative to conventional systems. Notably, the hybrid ring damper wall system reduces residual drift by 90%, significantly improving reparability for low- to mid-rise structures. These findings demonstrate the proposed system’s potential to enhance seismic resilience, achieving an optimal balance of flexibility, energy dissipation, and self-centering in precast concrete construction—particularly when multiple small wall panels and hybrid SMA-steel ring dampers are employed.