Nicolas Luco
Nico is a Research Civil Engineer in the Earthquake Hazards Program.
Science and Products
Filter Total Items: 71
The 2018 update of the US National Seismic Hazard Model: Ground motion models in the central and eastern US
The United States Geological Survey (USGS) National Seismic Hazard Model (NSHM) is the scientific foundation of seismic design regulations in the United States and is regularly updated to consider the best available science and data. The 2018 update of the conterminous US NSHM includes major changes to the underlying ground motion models (GMMs). Most of the changes are motivated by the new multi-p
Authors
Sanaz Rezaeian, Peter M. Powers, Allison Shumway, Mark D. Petersen, Nicolas Luco, Arthur Frankel, Morgan P. Moschetti, Eric M. Thompson, Daniel McNamara
The 2018 update of the US National Seismic Hazard Model: Where, why, and how much probabilistic ground motion maps changed
The 2018 US Geological Survey National Seismic Hazard Model (NSHM) incorporates new data and updated science to improve the underlying earthquake and ground motion forecasts for the conterminous United States. The NSHM considers many new data and component input models: (1) new earthquakes between 2013 and 2017 and updated earthquake magnitudes for some earlier earthquakes; (2) two updated smoothe
Authors
Mark D. Petersen, Allison Shumway, Peter M. Powers, Charles S Mueller, Morgan P. Moschetti, Arthur Frankel, Sanaz Rezaeian, Daniel McNamara, Nicolas Luco, Oliver S. Boyd, Kenneth S. Rukstales, Kishor S. Jaiswal, Eric M. Thompson, Susan M. Hoover, Brandon Clayton, Edward H. Field, Yuehua Zeng
A subset of CyberShake ground-motion time series for response-history analysis
This manuscript describes a subset of CyberShake numerically simulated ground motions that were selected and vetted for use in engineering response-history analyses. Ground motions were selected that have seismological properties and response spectra representative of conditions in the Los Angeles area, based on disaggregation of seismic hazard. Ground motions were selected from millions of availa
Authors
Jack W. Baker, Sanaz Rezaeian, Christine A. Goulet, Nicolas Luco, Ganyu Teng
Tall building performance-based seismic design using SCEC broadband platform site-specific ground motion simulations
The scarcity of strong ground motion records presents a challenge for making reliable performance assessments of tall buildings whose seismic design is controlled by large-magnitude and close-distance earthquakes. This challenge can be addressed using broadband ground-motion simulation methods to generate records with site-specific characteristics of large-magnitude events. In this paper, simulate
Authors
Kuanshi Zhong, Ting Lin, Greg Deierlein, Robert Graves, Fabio Silva, Nicolas Luco
Selecting three components of ground motions from Conditional Spectra for multiple stripe analyses
For complex structures where the seismic response depends appreciably on the vertical (V) component of ground motion (GM) (e.g., base-isolated buildings, long-span bridges, dams, nuclear power plants), incremental dynamic analysis (IDA) is commonly utilized to estimate seismic risk, where the V components of GM are selected and scaled based on the corresponding horizontal (H) components. The resul
Authors
N. Simon Kwong, Kishor S. Jaiswal, Nicolas Luco, J. W. Baker
Proposed AASHTO guidelines for performance-based seismic bridge design
No abstract available.
Authors
Thomas P. Murphy, Lee Marsh, Stuart Bennion, Ian G. Buckle, Nicolas Luco, Donald Anderson, Mervyn Kowalsky, Jose Restrepo
Assessing the long-term earthquake risk for the US National Bridge Inventory (NBI)
We estimate annualized earthquake loss associated with over 600,000 bridges located throughout the contiguous United States. Each year, the Federal Highway Administration, in partnership with State Departments of Transportation, undertake a massive exercise to update the National Bridge Inventory (NBI) by combining data from states, federal agencies, local jurisdictions, and tribal governments. Th
Authors
Kishor S. Jaiswal, N. Simon Kwong, S. S. Yen, D. Bausch, Kuo-wan Lin, Nicolas Luco, David J. Wald, J. Rozelle
Procedures for developing multi-period response spectra at non-conterminous United States sites
This study complements proposals to the Provisions Update Committee of the Building Seismic Safety Council that would incorporate multi-period response spectra (MPRS) in the 2020 edition of the NEHRP Recommended Seismic Provisions for New Buildings and Other Structures (2020 NEHRP Provisions) and related proposals to the ASCE 7-22 Seismic Subcommittee of the American Society of Civil Engineers for
Authors
Mai Tong, Robert D. Hanson, Charles A Kircher, Sanaz Rezaeian, Nicolas Luco
Risk-targeted alternatives to deterministic ground motion caps in U.S. seismic provisions
Since their inception over 20 years ago, the maximum considered earthquake ground motion maps in U.S. building codes have capped probabilistic values with deterministic ground motions from characteristic earthquakes on known active faults. This practice has increasingly been called into question both because of spatially non-uniform risk levels that are produced (risk being higher mainly in coasta
Authors
Jonathan P. Stewart, Nicolas Luco, John D Hooper, C. B. Crouse
Probabilistic seismic hazard analysis at regional and national scale: State of the art and future challenges
Seismic hazard modelling is a multi-disciplinary science that aims to forecast earthquake occurrence and its resultant ground shaking. Such models consist of a probabilistic framework that quantifies uncertainty across a complex system; typically, this includes at least two model components developed from Earth science: seismic-source and ground-motion models. Although there is no scientific presc
Authors
M. C. Gerstenberger, W. Marzocchi, T. J. Allen, M. Pagani, Janice Adams, L. Danciu, Edward H. Field, H. Fujiwara, Nicolas Luco, K-F Ma, C. Meletti, Mark D. Petersen
Proposed multi-period response spectra and ground motion requirements of the 2020 Recommended Provisions and ASCE 7-22
This paper summarizes a comprehensive set of proposals to the Provisions Update Committee of the Building Seismic Safety Council that would incorporate multi-period response spectra (MPRS) in the 2020 edition of the NEHRP Recommended Seismic Provisions for New Buildings and Other Structures (2020 NEHRP Provisions) and related proposals to the ASCE 7-22 Seismic Subcommittee of the American Society
Authors
Charles A Kircher, Sanaz Rezaeian, Nicolas Luco
The 2018 update of the US National Seismic Hazard Model: Overview of model and implications
During 2017–2018, the National Seismic Hazard Model for the conterminous United States was updated as follows: (1) an updated seismicity catalog was incorporated, which includes new earthquakes that occurred from 2013 to 2017; (2) in the central and eastern United States (CEUS), new ground motion models were updated that incorporate updated median estimates, modified assessments of the associated
Authors
Mark D. Petersen, Allison Shumway, Peter M. Powers, Charles Mueller, Morgan P. Moschetti, Arthur Frankel, Sanaz Rezaeian, Daniel E. McNamara, Nicolas Luco, Oliver S. Boyd, Kenneth S. Rukstales, Kishor S. Jaiswal, Eric M. Thompson, Susan M. Hoover, Brandon Clayton, Edward H. Field, Yuehua Zeng
USGS National Seismic Hazard Model User-Needs Workshop
The National Seismic Hazard Model Project (NSHMP) will be summarizing the 2023 National Seismic Hazard Model (NSHM) and presenting a preliminary future vision for the 2029 NSHM release. Day 1 will consist primarily of presentations as well as discussion and questions, and Day 2 will be focused on user participation.
New USGS map shows where damaging earthquakes are most likely to occur in US
USGS scientists and our partners recently revealed the latest National Seismic Hazard Model, showing that nearly 75% of the United States could experience a damaging earthquake, emphasizing seismic hazards span a significant part of the country.
Science and Products
Filter Total Items: 71
The 2018 update of the US National Seismic Hazard Model: Ground motion models in the central and eastern US
The United States Geological Survey (USGS) National Seismic Hazard Model (NSHM) is the scientific foundation of seismic design regulations in the United States and is regularly updated to consider the best available science and data. The 2018 update of the conterminous US NSHM includes major changes to the underlying ground motion models (GMMs). Most of the changes are motivated by the new multi-p
Authors
Sanaz Rezaeian, Peter M. Powers, Allison Shumway, Mark D. Petersen, Nicolas Luco, Arthur Frankel, Morgan P. Moschetti, Eric M. Thompson, Daniel McNamara
The 2018 update of the US National Seismic Hazard Model: Where, why, and how much probabilistic ground motion maps changed
The 2018 US Geological Survey National Seismic Hazard Model (NSHM) incorporates new data and updated science to improve the underlying earthquake and ground motion forecasts for the conterminous United States. The NSHM considers many new data and component input models: (1) new earthquakes between 2013 and 2017 and updated earthquake magnitudes for some earlier earthquakes; (2) two updated smoothe
Authors
Mark D. Petersen, Allison Shumway, Peter M. Powers, Charles S Mueller, Morgan P. Moschetti, Arthur Frankel, Sanaz Rezaeian, Daniel McNamara, Nicolas Luco, Oliver S. Boyd, Kenneth S. Rukstales, Kishor S. Jaiswal, Eric M. Thompson, Susan M. Hoover, Brandon Clayton, Edward H. Field, Yuehua Zeng
A subset of CyberShake ground-motion time series for response-history analysis
This manuscript describes a subset of CyberShake numerically simulated ground motions that were selected and vetted for use in engineering response-history analyses. Ground motions were selected that have seismological properties and response spectra representative of conditions in the Los Angeles area, based on disaggregation of seismic hazard. Ground motions were selected from millions of availa
Authors
Jack W. Baker, Sanaz Rezaeian, Christine A. Goulet, Nicolas Luco, Ganyu Teng
Tall building performance-based seismic design using SCEC broadband platform site-specific ground motion simulations
The scarcity of strong ground motion records presents a challenge for making reliable performance assessments of tall buildings whose seismic design is controlled by large-magnitude and close-distance earthquakes. This challenge can be addressed using broadband ground-motion simulation methods to generate records with site-specific characteristics of large-magnitude events. In this paper, simulate
Authors
Kuanshi Zhong, Ting Lin, Greg Deierlein, Robert Graves, Fabio Silva, Nicolas Luco
Selecting three components of ground motions from Conditional Spectra for multiple stripe analyses
For complex structures where the seismic response depends appreciably on the vertical (V) component of ground motion (GM) (e.g., base-isolated buildings, long-span bridges, dams, nuclear power plants), incremental dynamic analysis (IDA) is commonly utilized to estimate seismic risk, where the V components of GM are selected and scaled based on the corresponding horizontal (H) components. The resul
Authors
N. Simon Kwong, Kishor S. Jaiswal, Nicolas Luco, J. W. Baker
Proposed AASHTO guidelines for performance-based seismic bridge design
No abstract available.
Authors
Thomas P. Murphy, Lee Marsh, Stuart Bennion, Ian G. Buckle, Nicolas Luco, Donald Anderson, Mervyn Kowalsky, Jose Restrepo
Assessing the long-term earthquake risk for the US National Bridge Inventory (NBI)
We estimate annualized earthquake loss associated with over 600,000 bridges located throughout the contiguous United States. Each year, the Federal Highway Administration, in partnership with State Departments of Transportation, undertake a massive exercise to update the National Bridge Inventory (NBI) by combining data from states, federal agencies, local jurisdictions, and tribal governments. Th
Authors
Kishor S. Jaiswal, N. Simon Kwong, S. S. Yen, D. Bausch, Kuo-wan Lin, Nicolas Luco, David J. Wald, J. Rozelle
Procedures for developing multi-period response spectra at non-conterminous United States sites
This study complements proposals to the Provisions Update Committee of the Building Seismic Safety Council that would incorporate multi-period response spectra (MPRS) in the 2020 edition of the NEHRP Recommended Seismic Provisions for New Buildings and Other Structures (2020 NEHRP Provisions) and related proposals to the ASCE 7-22 Seismic Subcommittee of the American Society of Civil Engineers for
Authors
Mai Tong, Robert D. Hanson, Charles A Kircher, Sanaz Rezaeian, Nicolas Luco
Risk-targeted alternatives to deterministic ground motion caps in U.S. seismic provisions
Since their inception over 20 years ago, the maximum considered earthquake ground motion maps in U.S. building codes have capped probabilistic values with deterministic ground motions from characteristic earthquakes on known active faults. This practice has increasingly been called into question both because of spatially non-uniform risk levels that are produced (risk being higher mainly in coasta
Authors
Jonathan P. Stewart, Nicolas Luco, John D Hooper, C. B. Crouse
Probabilistic seismic hazard analysis at regional and national scale: State of the art and future challenges
Seismic hazard modelling is a multi-disciplinary science that aims to forecast earthquake occurrence and its resultant ground shaking. Such models consist of a probabilistic framework that quantifies uncertainty across a complex system; typically, this includes at least two model components developed from Earth science: seismic-source and ground-motion models. Although there is no scientific presc
Authors
M. C. Gerstenberger, W. Marzocchi, T. J. Allen, M. Pagani, Janice Adams, L. Danciu, Edward H. Field, H. Fujiwara, Nicolas Luco, K-F Ma, C. Meletti, Mark D. Petersen
Proposed multi-period response spectra and ground motion requirements of the 2020 Recommended Provisions and ASCE 7-22
This paper summarizes a comprehensive set of proposals to the Provisions Update Committee of the Building Seismic Safety Council that would incorporate multi-period response spectra (MPRS) in the 2020 edition of the NEHRP Recommended Seismic Provisions for New Buildings and Other Structures (2020 NEHRP Provisions) and related proposals to the ASCE 7-22 Seismic Subcommittee of the American Society
Authors
Charles A Kircher, Sanaz Rezaeian, Nicolas Luco
The 2018 update of the US National Seismic Hazard Model: Overview of model and implications
During 2017–2018, the National Seismic Hazard Model for the conterminous United States was updated as follows: (1) an updated seismicity catalog was incorporated, which includes new earthquakes that occurred from 2013 to 2017; (2) in the central and eastern United States (CEUS), new ground motion models were updated that incorporate updated median estimates, modified assessments of the associated
Authors
Mark D. Petersen, Allison Shumway, Peter M. Powers, Charles Mueller, Morgan P. Moschetti, Arthur Frankel, Sanaz Rezaeian, Daniel E. McNamara, Nicolas Luco, Oliver S. Boyd, Kenneth S. Rukstales, Kishor S. Jaiswal, Eric M. Thompson, Susan M. Hoover, Brandon Clayton, Edward H. Field, Yuehua Zeng
USGS National Seismic Hazard Model User-Needs Workshop
The National Seismic Hazard Model Project (NSHMP) will be summarizing the 2023 National Seismic Hazard Model (NSHM) and presenting a preliminary future vision for the 2029 NSHM release. Day 1 will consist primarily of presentations as well as discussion and questions, and Day 2 will be focused on user participation.
New USGS map shows where damaging earthquakes are most likely to occur in US
USGS scientists and our partners recently revealed the latest National Seismic Hazard Model, showing that nearly 75% of the United States could experience a damaging earthquake, emphasizing seismic hazards span a significant part of the country.