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Earthquakes and Structures Volume 21, Number 5, November 2021 , pages 551-562 DOI: https://doi.org/10.12989/eas.2021.21.5.551 |
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Peak floor acceleration prediction using spectral shape: Comparison between acceleration and velocity |
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José I. Torres, Edén Bojórquez, Robespierre Chavez, Juan Bojórquez, Alfredo Reyes-Salazar, Víctor Baca, Federico Valenzuela, Joel Carvajal, Omar Payán and Martín Leal
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| Abstract | ||
| In this study, the generalized intensity measure (IM) named INpg is analyzed. The recently proposed proxy of the spectral shape named Npg is the base of this intensity measure, which is similar to the traditional Np based on the spectral shape in terms of pseudo-acceleration; however, in this case the new generalized intensity measure can be defined through other types of spectral shapes such as those obtained with velocity, displacement, input energy, inelastic parameters and so on. It is shown that this IM is able to increase the efficiency in the prediction of nonlinear behavior of structures subjected to earthquake ground motions. For this work, the efficiency of two particular cases (based on acceleration and velocity) of the generalized INpg to predict the peak floor acceleration demands on steel frames under 30 earthquake ground motions with respect to the traditional spectral acceleration at first mode of vibration Sa(T1) is compared. Additionally, a 3D reinforced concrete building and an irregular steel frame is used as a basis for comparison. It is concluded that the use of velocity and acceleration spectral shape increase the efficiency to predict peak floor accelerations in comparison with the traditional and most used around the world spectral acceleration at first mode of vibration. | ||
| Key Words | ||
| efficiency; intensity measure; peak floor acceleration; seismic response; spectral shape | ||
| Address | ||
| José I. Torres: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n,C.P. 80040, Culiacán, Sinaloa, México Edén Bojórquez: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n,C.P. 80040, Culiacán, Sinaloa, México Robespierre Chavez: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n,C.P. 80040, Culiacán, Sinaloa, México Juan Bojórquez: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n,C.P. 80040, Culiacán, Sinaloa, México Alfredo Reyes-Salazar: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n,C.P. 80040, Culiacán, Sinaloa, México Víctor Baca: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n,C.P. 80040, Culiacán, Sinaloa, México Federico Valenzuela: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n,C.P. 80040, Culiacán, Sinaloa, México Joel Carvajal: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n,C.P. 80040, Culiacán, Sinaloa, México Omar Payán: Department of Mechanical and Mechatronic Engineering, Tecnológico Nacional de México Campus Culiacán, Culiacán, Sinaloa, México Martín Leal: Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calzada de las Américas y B. Universitarios s/n,C.P. 80040, Culiacán, Sinaloa, México | ||