scholarly journals Numerically Simulated Structural Response of a Bearing Steel Frame with Joints of Varying Stiffness to Fully Developed Fire Conditions

2019 ◽  
Vol 53 (1) ◽  
pp. 32-45
Author(s):  
Mariusz Maślak ◽  
Piotr Wożniczka
Keyword(s):  
Structural Response ◽  
Bearing Steel ◽  
Steel Frame ◽  
Fire Conditions

scholarly journals Progressive Collapse Assessment: A review of the current energy-based Alternate Load Path (ALP) method

2019 ◽  
Vol 258 ◽  
pp. 02012 ◽  
Author(s):  
Nur Ezzaryn Asnawi Subki ◽  
Hazrina Mansor ◽  
Yazmin Sahol Hamid ◽  
Gerard Parke
Keyword(s):  
Dynamic Analysis ◽  
Static Analysis ◽  
Progressive Collapse ◽  
Structural Response ◽  
Steel Frame ◽  
Collapse Mechanism ◽  
Load Path ◽  
Acceptance Criterion ◽  
Current Energy ◽  
Collapse Assessment

The Alternate Load Path (ALP) is a useful method that has generated a considerable recent research interest for the assessment of progressive collapse. The outcome of the ALP analysis can be assessed either using the force-based approach or the energy-based approach. The Unified Facilities Criteria (UFC- 4- 023-03) of progressive collapse guideline - have outlined that the force-based approach can either be analysed using static or dynamic analysis. The force-based approach using static analysis is preferable as it does not require a high level of skill and experience to operate the software plus no effort is required in scrutinising the validity of the analysis results output. However, utilising the static approach will eliminate the inertial effect in capturing the actual dynamic response of the collapsed structure. In recent years, the development of the energy-based progressive collapse assessment is attracting widespread interest from researchers in the field; as the approach can produce a similar structural response with the force-based dynamic analysis by only using static analysis. Most of the current energy-based progressive collapse assessments are developed following the requirements which are given in the progressive collapse guidelines provided by the Unified Facilities Criteria. However, little attention is given to the development of the energy-based approach using the Eurocode standards as a base guideline. This article highlights the merits of utilising the energy-based approach against the force-based approach for a collapsed structure and explains the collapse mechanism of a steel frame in the perspective of the energy concept. The state of the art of energy-based progressive collapse assessment for a structural steel frame is reviewed. The comprehensive review will include insights on the development of the energy-based method, assumptions, limitations, acceptance criterion and its applicability with the European standards. Finally, potential research gaps are discussed herein.

Modelling steel frame behaviour under fire conditions

1991 ◽  
Vol 13 (4) ◽  
pp. 371-382 ◽  
Author(s):  
H.A. Saab ◽  
D.A. Nethercot
Keyword(s):  
Steel Frame ◽  
Fire Conditions

Nonlinear analysis of the progressive collapse for two-dimensional steel frame under fire conditions

2018 ◽  
Vol 5 (2) ◽  
pp. 8718-8726 ◽  
Author(s):  
N. Parthasarathi ◽  
K. Thiagarajan ◽  
K.S. Satyanarayanan ◽  
V. Thamilarasu
Keyword(s):  
Nonlinear Analysis ◽  
Progressive Collapse ◽  
Steel Frame ◽  
Two Dimensional ◽  
Fire Conditions

Stress Impact Analysis of Steel Frame with Different Beam-Column Connection Mode

2013 ◽  
Vol 275-277 ◽  
pp. 1028-1033
Author(s):  
Gang Wang
Keyword(s):  
Impact Analysis ◽  
Structural Response ◽  
Time History ◽  
Horizontal Displacement ◽  
Element Model ◽  
Steel Frame ◽  
Frame Structure ◽  
Natural Period ◽  
Vibration Period ◽  
Steel Frame Structure

This paper uses the SAP2000 to establish different beam column connections of steel frame structure finite element model, comparative analysis of the beam column for the rigid connection, hinged, semi-rigid connections of steel frame structure, the dynamic characteristics of structure displacement and internal force influence. At the same time, the dynamic time-history analysis method for structural displacement supplementary checking, analysis of structural response to seismic wave degree．The results showed that：compared with rigid, the structure of semi-rigid connections to the larger natural period，and with the rotation stiffness decreases vibration period increases; Semi-rigid steel frame connection to reduce the resistance to push the layer stiffness，making the structure of the horizontal displacement increased．

Life safety in single-story steel frame buildings, Part II - probabilistic design

2020 ◽  
Vol 11 (3) ◽  
pp. 379-394
Author(s):  
Joakim Sandström
Keyword(s):  
Steel Frame ◽  
Life Safety ◽  
Fire Damage ◽  
Probabilistic Design ◽  
Content Type ◽  
Structural Fire ◽  
Frame Building ◽  
Frame Buildings ◽  
Steel Frame Buildings ◽  
Fire Conditions

Purpose This paper aims to investigate the probability of unacceptable consequences from structural fire damage in a typical Scandinavian single-story steel frame building and discusses it in relation to life safety. This paper is a complement to the paper “Life safety in single-story steel frame buildings, Part I – deterministic design” by Sandström (2019) which considers the same design philosophy but with a probabilistic design approach. Design/methodology/approach The reliability of a single-story steel frame building is investigated by using crude Monte Carlo simulation by including consideration to the fire conditions. Findings The investigated building does not meet the safety levels as stipulated by EN 1990 for structural fire damage. However, by including consideration to the fire conditions in the compartment, it is shown that the life safety objective is not compromised by the structural fire damage, i.e. the structure remains intact as long as any individuals/firefighters can survive within the fire area compartment. Originality/value This paper presents practical application of a conceptual paper presenting a general approach to structural fire safety design and the life safety objective.

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