PARAMETRIC STUDY OF WEB-POST BUCKLING FAILURE ON PROTECTED COMPOSITE CELLULAR STEEL BEAM (CSB) AT ELEVATED TEMPERATURE
DOI:
https://doi.org/10.11113/jurnalteknologi.v87.21386Keywords:
Vertical deformation, web-post buckling, intumescent coatings, fire, finite element simulation, steel structuresAbstract
Cellular Steel Beam (CSB) are Widely recognized and used in steel structures due to their numerous benefits, including visually appealing design, flexible structural elements, exceptional structural integrity, and the ability to incorporate utility conduits within the web beam section. These beams are often integrated into construction systems, often requiring the alteration of solid steel beams through the introduction of web holes to preserve their structural integrity. This study investigates the various forms of CSB failure that may arise from the insertion of circular web holes. High temperatures are a significant environmental factor that significantly impacts the performance of CSB, with failure modes associated with elevated temperatures including Vierendeel bending, web-post buckling, and vertical deformation. The study uses extensive finite element simulations with the ABAQUS program to numerically simulate and investigate the performance of shielded CSB with web apertures under increased temperature conditions and applied stresses. The study presents a novel methodology involving the use of intumescent coatings with different thicknesses to provide complete coverage of the CSB, aiming to improve the stiffness of the beam when exposed to high temperatures. The simulation findings show that the use of thicker intumescent coatings leads to marginal enhancements in the reduction of vertical deformation and web-post buckling. These findings are of practical significance for professionals in structural engineering and architecture involved in designing and evaluating structures based on composite steel and concrete materials in fire-prone areas, contributing to the advancement of resilient structural engineering.
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