• Pragalbh Tripathi
• Anurag Wahane

This study performs a detailed buckling analysis of ISMB 400 steel beams featuring innovative web apertures, utilizing ANSYS software for numerical assessment. A load of 1000 Newtons was applied along with a constant beam length of 1000 millimetres. The study investigates the impact of hexagonal, pentagonal, and square perforations (each with a side length of 100 mm) as well as one, two, and three circular apertures (each with a diameter of 100 mm) on buckling resistance, stress concentration, and structural stability. The results demonstrate that circular openings produce the most consistent stress distribution, effectively reducing stress peaks. In contrast, polygonal openings are likely to elevate stress concentrations at their corners, thereby increasing the risk of buckling. Furthermore, increased perforations heightens stress localization, especially in hexagonal and pentagonal configurations. This research is essential for standardization efforts, offering critical data for structural engineers and infrastructure development in India. It encourages safer and more optimized designs by effectively balancing material efficiency with stability, benefiting engineering practices and society. Study reveal that circular apertures consistently yield the lowest stress peaks and deformation increases, with a 10.3% gain in buckling load for triple openings. Polygonal shapes, particularly hexagons, exhibit up to 830.1% stress amplification and localize buckling risk. Square openings offer the greatest mass reduction (3.74%) but incur high deformation (+17.80%) and reduced buckling capacity (–2.0%).

ISMB 400, buckling analysis, novel shape openings, ANSYS, circular perforation, hexagonal perforation, pentagonal perforation, square perforation, beam stability, structural optimization, standardization, Indian structural engineering.

"Effect of Shape and Quantity of Web Openings on the Buckling Resistance of Hot Rolled ISMB 400 Beams", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 8, page no.f521-f527, August-2025, Available :http://www.jetir.org/papers/JETIR2508571.pdf

"Effect of Shape and Quantity of Web Openings on the Buckling Resistance of Hot Rolled ISMB 400 Beams", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 8, page no. ppf521-f527, August-2025, Available at : http://www.jetir.org/papers/JETIR2508571.pdf