Performance-based design | An-Najah Staff

Performance-Based Fire Safety Design of Reinforced Concrete Beams

Sun, 2014-06-01 12:37 — Monther Dwaikat

Journal Title, Volume, Page:

Journal of Fire Protection Engineering, Vol. 17, No. 3, pp. 293-320

Year of Publication:

2007

Link:

http://jfe.sagepub.com/content/17/4/293.abstract

Authors:

M. Dwaikat

Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824-1126, USA

Current Affiliation:

Building Engineering Department, Faculty of Engineering and Information Technology, An-Najah National University, Nablus, Palestine

[email protected]

V.K.R. Kodur

Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI 48824-1126, USA

Preferred Abstract (Original):

A numerical model, in the form of a computer program, is presented for tracing the fire behavior of reinforced concrete (RC) beams over the entire range of loading from pre-fire conditions to collapse under fire. The three stages associated with the analysis of fire resistance; namely, establishing the fire temperature—time development, calculating the heat transfer through the structure from the fire, and the structural analysis are explained. The model, which accounts for nonlinear material properties at elevated temperatures, is capable of predicting the fire resistance of RC beams under realistic fire scenarios, load levels, and failure criteria. The validity of the numerical model is established by comparing the predictions from the computer program with results from full-scale fire resistance tests. Through the results of numerical study, it is shown that the type of failure criterion, load level, and fire scenario have significant influence on fire resistance of RC beams. The computer program can be used to undertake performance-based fire safety design of RC beams for any value of the significant parameters, such as fire exposure, concrete cover thickness, section dimensions, concrete strength, concrete type, and load intensity.

High-Temperature Properties of Steel for Fire Resistance Modelling of Structures

Mon, 2013-04-08 16:08 — Mahmoud M.S. Dwaikat

Journal Title, Volume, Page:

Journal of Materials in Civil Engineering, ASCE, 22(5), 423-434

Year of Publication:

2010

Link:

http://ascelibrary.org/action/showAbstract?page=423&volume=22&issue=5&journalCod...

Authors:

Venkatesh Kodur

Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI (corresponding author)

M.M.S. Dwaikat

Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI

Current Affiliation:

Department of Civil Engineering, An-Najah National University, Palestine

[email protected]

R. Fike

Civil and Environmental Engineering, Michigan State Univ., East Lansing, MI

Preferred Abstract (Original):

Fire is one of the most severe conditions to which structures can be subjected, and hence, the provision of appropriate fire safety measures for structural members is an important aspect of design. The recent introduction of performance-based codes has increased the use of computer-based models for fire resistance assessment. For evaluating the fire resistance of steel structures, high-temperature properties of steel are to be specified as input data. This paper reviews high-temperature constitutive relationships for steel currently available in American and European standards, and highlights the variation between these relationships through comparison with published experimental results. The effect of various constitutive models on overall fire resistance predictions is illustrated through case studies. It is also shown that high-temperature creep, which is not often included in constitutive models, has a significant influence on the fire response of steel structures. Results from the case studies are used to draw recommendations on the use of appropriate constitutive models for fire resistance assessment. Read More: http://ascelibrary.org/action/showAbstract?page=423&volume=22&issue=5&jo...