Numerous studies have been carried out to explore the response of a structure featuring an innovative structural design, with particular emphasis on investigating the performance of shear walls and bracings with modifying their arrangements and material characteristics. In earthquake design guidelines for both concrete and steel buildings, compliance with life safety (LS) and performance level (PL) requirements is imperative. However, it has been observed that the existing lateral load-resisting system, while effective, may not sufficiently withstand strong ground motion accelerations. To address this challenge, a novel lateral load-resisting system has been developed by integrating two established methods—shear walls and bracings. This structural arrangement combines a gravity load-resisting technology (a classical moment resisting frame) with two lateral load-resisting schemes (shear walls and bracings). Analytical finite element analysis, employing a nonlinear dynamic approach, has been conducted to explore the behavior of structures amid tremor conditions. A wide range of parameters have been considered for comparative research, focusing on the El-Centro and Alaska earthquakes with magnitudes of 7.1 and 7.9, respectively. Various damping percentages, including 0, 2, 3, 5, 7, and 10%, have been examined concerning base shear, story drift, spectral displacement, and spectral acceleration.

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Nonlinear Dynamic Response of Structures Located in Tehran: A Comparative Study Based on El-Centro and Alaska Earthquakes

  • Aditya Kumar Tiwary,
  • Harpreet Singh

摘要

Numerous studies have been carried out to explore the response of a structure featuring an innovative structural design, with particular emphasis on investigating the performance of shear walls and bracings with modifying their arrangements and material characteristics. In earthquake design guidelines for both concrete and steel buildings, compliance with life safety (LS) and performance level (PL) requirements is imperative. However, it has been observed that the existing lateral load-resisting system, while effective, may not sufficiently withstand strong ground motion accelerations. To address this challenge, a novel lateral load-resisting system has been developed by integrating two established methods—shear walls and bracings. This structural arrangement combines a gravity load-resisting technology (a classical moment resisting frame) with two lateral load-resisting schemes (shear walls and bracings). Analytical finite element analysis, employing a nonlinear dynamic approach, has been conducted to explore the behavior of structures amid tremor conditions. A wide range of parameters have been considered for comparative research, focusing on the El-Centro and Alaska earthquakes with magnitudes of 7.1 and 7.9, respectively. Various damping percentages, including 0, 2, 3, 5, 7, and 10%, have been examined concerning base shear, story drift, spectral displacement, and spectral acceleration.