Conventional concrete shear walls lack self-centering capability leading to enduring inter-story drifts after a seismic event. However, post-tensioned shear walls (PTSW), having distinctive self-centering attributes, significantly improve building resilience and lifespan, particularly in seismically vulnerable regions. PTSW behaves like a rocking system, and the use of post-tensioned (PT) tendons further optimizes material use by reducing the need for vertical mild steel reinforcement. Although this rocking system is good in terms of self-centering capability, it has little vibration absorption capacity. Therefore, additional energy-dissipating reinforcements (EDR) are provided, either internally or externally to PTSW, which is called a hybrid post-tensioned shear wall. In the present study, the EDR system is proposed to be external, demonstrating effective rocking behavior with self-centering and substantial energy dissipation. The effect of EDR placement and PT tendon layout on the seismic response of hybrid PTSW has been studied numerically to propose a suitable location for EDR and for various tendon configurations under various design drift conditions.

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Effects of Energy-Dissipating Reinforcement Placement and Post-tensioned Cable Layout on Seismic Response of Hybrid Post-tension Shear Wall

  • F. A. Q. Syed,
  • R. Agrawal,
  • S. R. Dash,
  • G. Mondal

摘要

Conventional concrete shear walls lack self-centering capability leading to enduring inter-story drifts after a seismic event. However, post-tensioned shear walls (PTSW), having distinctive self-centering attributes, significantly improve building resilience and lifespan, particularly in seismically vulnerable regions. PTSW behaves like a rocking system, and the use of post-tensioned (PT) tendons further optimizes material use by reducing the need for vertical mild steel reinforcement. Although this rocking system is good in terms of self-centering capability, it has little vibration absorption capacity. Therefore, additional energy-dissipating reinforcements (EDR) are provided, either internally or externally to PTSW, which is called a hybrid post-tensioned shear wall. In the present study, the EDR system is proposed to be external, demonstrating effective rocking behavior with self-centering and substantial energy dissipation. The effect of EDR placement and PT tendon layout on the seismic response of hybrid PTSW has been studied numerically to propose a suitable location for EDR and for various tendon configurations under various design drift conditions.