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Khanal, Laxman. Numerical study on behavior of unprotected steel H-beams in fire by LS-DYNA explicit solver. Master's Degree(Engineering and Technology). Thammasat University. Thammasat University Library. : Thammasat University, 2020.
Numerical study on behavior of unprotected steel H-beams in fire by LS-DYNA explicit solver
Name: Khanal, Laxman
keyword:
Fire-resistance rating
;
H-beam
;
LS-DYNA
Abstract:
Steel is the most used construction material due to its inherent structural capability and its versatility as a new and green material. However, the major disadvantage for adopting steel as a structural member is due to its inability to resist fire so, an attempt is performed in studying the response of structural steel while subjected to fire numerically. With the calibrated numerical model and selection of suitable element formulation and material model a case study is performed for the performance evaluation of structural steel adopted for commercial building located in Thailand. This study presents the results of numerical analysis of structural steel in fire loading using various material models and different element formulation in LS-DYNA. Among several inbuilt material models and element formulations within the explicit finite element solver LS-DYNA, *MAT225 with Belytschko-Tsay shell element was adopted to predict the fire-resistance rating of HEB 300 hot rolled unprotected steel beam for standard fire furnace test based on ISO 834. A comparison of fire resistance rating was performed between the current numerical results and test results from reliable literature. In addition, the comparisons of deflection and rate of deflection were made the present numerical results and those tests based on EN 1993-1-1 and EN 1993-1-2 criteria. Fire load on beam was applied on nodes by temperature effects based on radiation and convection with varying specific heat values. Following the calibrated modeling approach, a 3D numerical model was developed for structural steel of O-NES tower. From the results of the current analysis, it was observed that the unprotected steel H-beam could not satisfy the limiting deflection criteria based on ISO 834 standard fire curve. Hence, coating is suggested which will protect the steel and enhance the rating. However, from the study performed to predict equivalence of fire severity based on areas beneath the standard and compartmental temperature-time curves for office (iBMB) it was observed that the studied section can fulfill the rating requirement
Thammasat University. Thammasat University Library
Address:
BANGKOK
Email:
preserv@tu.ac.th
Name: Taweep Chaisomphob
Role:
advisor
Created:
2020
Modified:
2022-11-09
Issued:
2022-11-09
วิทยานิพนธ์/Thesis
application/pdf
eng
DegreeName: Master of Science
Level: Master's Degree
Descipline: Engineering and Technology
Grantor: Thammasat University
©copyrights Thammasat University
RightsAccess:
ใช้เวลา
0.030142 วินาที
Khanal, Laxman
| Title | Contributor | Type |
|---|---|---|
| Numerical study on compartmental equivalence of fire resistance rating based on areas beneath method
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Khanal, Laxman;Taweep Chaisomphob | บทความ/Article | |
| Numerical study on behavior of unprotected steel H-beams in fire by LS-DYNA explicit solver
มหาวิทยาลัยธรรมศาสตร์ Khanal, Laxman | Taweep Chaisomphob | วิทยานิพนธ์/Thesis |
Taweep Chaisomphob