High-temperature tensile constitutive data and models for structural steels in fire

Luecke, William E.; Banovic, Stephen W.; McColskey, Joseph D.

doi:10.6028/nist.tn.1714

Cited by 24 publications

(54 citation statements)

References 29 publications

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“…These differences in shape lead to differences in the inelastic stability limits of columns and laterally unsupported beams. Another example of differences in material properties can be found in a recent study conducted at the National Institute of Standards and Technology (NIST) where the listed properties are different than those listed in EC3 (Luecke 2014). Noteworthy, that the mechanical properties in AISC 360 (AISC 2010) are comparable to that of EC3.…”

Section: Specified Materials Propertiesmentioning

confidence: 94%

Challenges and alternative approaches for simulating the response of steel structures exposed to fire

Mahmoud¹,

Ellingwood²,

Memari³

2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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Although structurally significant building fires are rare events, their occurrence can cause substantial damage and may lead to partial or complete system collapse. While fireproofing has proven to be effective in mitigating the effect of severe fires, it is rated for only a certain time and will eventually fail to provide adequate protection during a large or extended fire event. Furthermore, fireproofing typically is rated using a standard fire exposure, such as ISO 834 or ASTM E119, neither of which represent realistic fire exposures in an actual building. With the worldwide move toward performance-based fire protection engineering, understanding and quantifying system behavior through advanced numerical simulations, especially during the heating and cooling phases of realistic fire exposures, is essential for establishing proper performance-based provisions for fire engineering that ensure both safe and economical design. This paper highlights current challenges in simulating the effect of fire on steel components and frames, including proper representation of loading and boundary conditions, geometrical nonlinearities, material inelasticity, and numerical instabilities. The structural models considered include 2-D line elements, 3-D continuum elements, and multi-resolution models. In addition, the advantages and drawbacks of these models are highlighted and the implication of their features is discussed. The highlighted modeling approaches and the corresponding results shown can be used by engineers for selecting the most economical and effective techniques for simulating the response of components and structural systems to scenario fire hazards accurately. KEY WORDSFire, finite element analysis, steel structural buildings, reduced beam section connections.

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Section: Specified Materials Propertiesmentioning

confidence: 94%

Challenges and alternative approaches for simulating the response of steel structures exposed to fire

Mahmoud¹,

Ellingwood²,

Memari³

2015

Proceedings of the Second International Conference on Performance-Based and Life-Cycle Structural Engineering (PLSE 2015)

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“…High temperature thermal and mechanical material properties of steel are available [15,58,59]. Most are for steels used in buildings but recent studies have been made on steels used in bridges such as A709 and A588 weathering steel [60,61].…”

Section: (C) Constitutive Materialsmentioning

confidence: 99%

“…The literature review indicates that the high temperature properties of steel (structural, reinforcing steel) are available (e.g. [72,59]). However, there is large variability in similar data obtained from different sources.…”

Section: (C) Materials Testsmentioning

confidence: 99%

International R and D Roadmap for Fire Resistance of Structures Summary of NIST/CIB Workshop

Yang¹,

Bundy²,

Gross³

et al. 2015

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This report summarizes the results of the global meeting to develop the International R&D Roadmap for Fire Resistance of Structures (the Roadmap) held May 21-22, 2014, in Gaithersburg, Maryland. The workshop was sponsored by the National Institute of Standards and Technology (NIST) and the International Council for Research and Innovation in Building and Construction (CIB) and hosted by NIST. The workshop provided a forum to identify and discuss the research and development needs and programs to implement to advance technical solutions in order to improve the fire resistance of structures through greater use of existing technologies, development and deployment of emerging technologies, and development and implementation of standards and codes for performance-based engineering design. In preparation for the workshop, NIST commissioned three white papers-one on concrete structures, one on steel structures, and one on timber structures-written by topic experts in the respective fields.

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“…A study by the National Institute of Standards and Technology (NIST) (Luecke et al 2011) provides measurements of yield strength at a strain equal to 2 % at elevated temperatures. Those data and the EC3 model (Eq.…”

Section: Mechanical Properties At Elevated Temperaturesmentioning

confidence: 99%

Probabilistic Evaluation Framework for Fire and Fire Following Earthquake

Khorasani

Garlock

Gardoni

2016

Multi-Hazard Approaches to Civil Infrastructure Engineering

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This work provides a probabilistic framework to evaluate the performance of a structure under fire and fire following earthquake, by studying response of the structure for several limit states and incorporating uncertainties in demand and capacity parameters. The multi-hazard framework is then applied to a steel moment resisting frame (MRF) to evaluate the structural performance of the MRF under post-earthquake fires. The study develops probabilistic models for key quantities with uncertainty including fire load, as well as yield strength and modulus of elasticity of steel at elevated temperatures. The MRF is analyzed under several fire scenarios and fire locations. Results show that the location of fire in the frame (e.g., lower vs. upper floors and interior vs. exterior bays) affects the element response. Compartments in the interior bays reach limit states faster than those on the perimeter of the frame, and upper floors reach limit states sooner than lower floors. The post-earthquake damage does not affect the structural response under fire for the considered limit states, but post-earthquake fire increases the drift demand on columns located at the perimeter of the structure. IntroductionThe available codes and guidelines on design of structures for fire are based on performance evaluation at the component level and using deterministic approaches, while fire events and performance of structures at elevated temperatures involve

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High-temperature tensile constitutive data and models for structural steels in fire

Cited by 24 publications

References 29 publications

Challenges and alternative approaches for simulating the response of steel structures exposed to fire

Challenges and alternative approaches for simulating the response of steel structures exposed to fire

International R and D Roadmap for Fire Resistance of Structures Summary of NIST/CIB Workshop

Probabilistic Evaluation Framework for Fire and Fire Following Earthquake

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