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Computational fluid dynamics (CFD) simulations for structural wind engineering applications require a fully developed boundary layer approach flow with horizontal homogeneity and zero pressure gradient for accurate characterization of wind loading on a
Jack Baker, Edward Almeter, Dustin Cook, ABBIE LIEL, Curt Haselton
This paper proposes a model to quantify dependencies in component damage in the FEMA P-58 seismic performance assessment methodology, and to simulate damage realizations with the desired dependencies. The model is compatible with the prior FEMA P-58
While recent advancements have been made in performance-based earthquake engineering to stochastically quantify functional recovery times for individual buildings, most of the modern building stock is designed according to prescriptive codes and standards
Negar Mohammadgholibeyki, Maria Jose Echeverria, Amir Safiey, Dustin Cook, Maria Koliou, ABBIE LIEL
Damage from past earthquakes has significantly impeded post-earthquake building function, threatening community resilience, and motivating consideration of functional recovery in building design and assessment. This study examines whether it is feasible to
Juan Fung, Yating Zhang, Dustin Cook, Siamak Sattar, Katherine Johnson
This article reviews current research and development efforts to advance the science supporting post-earthquake recovery-based performance objectives for buildings and critical lifelines in the United States. In particular, the article highlights advances
Retrofit and repair of structures occur under differing circumstances but are both necessary to improve existing building stock and increase resilience of communities against hazards. FRP is an attractive option for both retrofit and repair because of its
The development of risk-targeted design loads for recovery-based design first requires consensus around acceptable levels of building risk, specifically in terms of recovery-based performance objectives such as reoccupancy and functional recovery. This
A 4-story steel moment-frame building designed according to ASCE 7 was used in a numerical parameter study to assess the effects of modeling features on peak drift demands. Features studied included strength, stiffness, ductility, and degradation along
Andrew Sen, Dustin Cook, ABBIE LIEL, Tarbin Basnet, Russell Berkowitz, Ariel Creagh, Wassim Ghannoum, Ayse Hortacsu, Insung Kim, Hamid Koodiani, Dawn Lehman, Laura Lowes, Adolfo Matamoros, Farzad Naeim, Siamak Sattar, Rob Smith
The U.S. consensus standard for seismic evaluation and retrofit of existing buildings, ASCE/SEI 41, establishes provisions for seismic analysis procedures that vary in complexity and fidelity. Although ASCE/SEI 41 provides detailed nonlinear dynamic
Dustin Cook, Andrew Sen, Tarbin Basnet, Hamid Koodiani, Ariel Creagh, Abbie Liel, Russell Berkowitz, Wassim Ghannoum, Ayse Hortacsu, Insung Kim, Dawn Lehman, Laura Lowes, Adolfo Matamoros, Farzad Naeim, Siamak Sattar, Rob Smith
ASCE/SEI 41 is the consensus U.S. standard for the seismic evaluation and retrofit of existing buildings. Although the performance-based engineering standard is based on decades of research and the result of significant vetting by ASCE and other committees
Brian O'Connor, Karah Osburn, Jennifer Mitchell, Heidi Szabo, Marc Levitan
The purpose of this fact sheet is to provide a brief overview of building envelope considerations and load path improvements to reduce damages to wood framed, one- and two-family residential structures when subjected to tornadoes rated on the Enhanced
Erik Perfetto, James Taylor, Karah Osburn, Brian O'Connor, Marc Levitan, Jennifer Mitchell
This instructional guidance is for design professionals and building officials to help them determine when a building or other structure is required to be designed to minimum tornado loads and how to calculate design tornado forces. This guide is in
Zhidong Zhang, Matthew Speicher, Amanpreet Singh, Tara Hutchinson, Benjamin Schafer
This study proposes a modeling protocol for the lateral performance of cold-formed steel (CFS) framed wall-lines that contain both steel sheet sheathed shear walls as well as gravity walls and may include the impact of non-structural finish on these wall
The National Institute of Standards and Technology has developed advanced Database-Assisted Design (DAD) procedures for the design of structural members subjected to direction-dependent wind loads. Recently, a DAD_ETABS procedure that uses the ETABS
Recently significant attention has been paid to the regional risk assessment of infrastructure systems as proper risk assessment can lead to informed decision and recovery strategies. This paper presents the regional risk assessment of bridge systems using
Aging buildings and ever evolving design codes imply the need of implementing retrofit techniques to ensure the safety and functionality buildings under current operating loads as well as extreme hazard events. Fiber reinforced polymer (FRP) composites are
Fiber reinforced polymer (FRP) has become more prevalent and accepted as a construction material, and particularly as a retrofit technique. However, there remains a need for design guides and standards for FRP-retrofitted components and structures
Matthew Speicher, Zhidong Zhang, Benjamin W. Schafer
The objective of this paper is to evaluate the impact of applying the ASCE 41-17 performance-based design provisions on a 2-story case study building previously design and tested during the CFS-NEES research project. The latest version of the American
Christopher Segura, Siamak Sattar, Mohammadamin Hariri Ardebili
In seismic performance evaluations, the force-deformation response of a structure is typically assessed using a deterministic analytical model, and inherent uncertainty is often neglected. For reinforced concrete structures, a source of uncertainty is
This article discusses the background and motivation of work conducted at NIST to advance first-generation performance-based design procedures in ASCE 41.