An Assessment of Selected Programs at the National Institute of Standards and Technology Engineering Laboratory Fiscal Year 2020 (2021) / Chapter Skim
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3 Structural Performance Under Multi-Hazards (SPUMH) Program
3 Structural Performance Under Multi-Hazards (SPUMH) Program
Pages 19-27
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From page 19... ...
The research thrusts have motivated a wide range of projects, including the investigation of the Joplin Missouri Tornado and Hurricane Maria; improvement in the nation's wind design standards and practices; development of design provisions for tornado resistance; development of computational wind engineering procedures for using computational fluid dynamics; research into the effects of ASR in existing concrete structures; development of a life-cycle condition assessment platform; and continued work on developing robust, collapse-resistant structures, following on the World Trade Center investigations performed in the past. Collaboration with the EL fire science researchers would yield information on the effects of fire on structural performance.
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From page 20... ...
In recent years, NIST has performed a series of wind hazard studies that have resulted in updated wind hazard maps adopted by the building codes and nation's standards. The staff's national wind hazard study conducted in 2014-2015 resulted in adoption by the American Society of Civil Engineers (ASCE)
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From page 21... ...
Challenges and Opportunities On the basis of feedback received from the ASCE 7 standards committee, the tornado hazard maps and design provisions were developed to target the same level of structural reliability provided by the building code for wind resistance. Because the probability that a building will actually be subjected to a tornado is very small, the protection is against only moderate tornado events (EF-I or II)
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From page 22... ...
The project approach is categorized into the following three components: evaluation of structural robustness based on experimental validation; enhancement of structural robustness through the development of improved structural connections; and technology transfer through the development of guidelines, standard provisions, and acceptance criteria. Accomplishments This is a developing research area that builds on the disproportionate-collapse work performed in the early 2000s related to the World Trade Center and Pentagon investigations.
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From page 23... ...
The structural engineering personnel address a broad range of topics that are generally associated with structural collapse issues. They have developed deep experience in studying structural failures, such as those associated with the destruction of the World Trade Center.
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From page 24... ...
and technical notes; publication of papers and articles in journals and conference proceedings; best practices documents and guidelines, as well as pre-standards in partnership with industry; and working directly with standards development organizations and the model building code development organizations to introduce technical requirements into industry practices. The group contributed to publication of a large series of NCSTARs associated with studies of the cause of collapse of the New York World Trade Center Buildings during the period 2002-2005.
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From page 25... ...
NIST successfully worked with the International Code Council to develop a standard for design and construction of storm shelters5 that was adopted by the International Building Code. In addition, NIST has developed a set of probabilistic tornado hazard maps for the contiguous United States and introduced requirements for tornado-resistant design for inclusion into the ASCE 7-22 standard that will require design of important structures for resistance of moderate (EF-I and II)
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From page 26... ...
NIST is in a unique position to offer standardized solutions to structural database interoperability. RECOMMENDATION: In order to permit broad impact of the linking of wind engineering and design tools with the Database Assisted Design program, the NIST program should consider, beyond the current collaboration with a single software supplier, collaborative development of open-source software.
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From page 27... ...
Effectiveness of Dissemination of Outputs Interaction with organizations responsible for building codes development and implementation, benchmarking, design, and related research yields a two-way advantage -- it provides knowledge to NIST researchers, and it enhances NIST's reputation and influence. RECOMMENDATION: The Structures Group should develop industry benchmarks and guidelines for the application of computational wind engineering and computational fluid dynamics as applied to the design of buildings.
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