• mamta prabhakar belekar
• pallavi bhende
• Gaurav Hingwe

Railway Under Bridges (RUBs) constructed using RCC box culverts are widely used for safe and efficient transportation. The structural behavior of these culverts is significantly influenced by factors such as cushion thickness and skew angle. This study aims to investigate the effect of varying cushion thickness and skew angle. This study aims to investigate the effect of varying cushion thickness and skew angle on the performance of RCC box culverts. In this research, a standard RCC box culvert model is analyzed using finite element -based software under different loading conditions, including dead load, live load and earth pressure. Cushion thickness of 0.5m, 1.0m,1.5m and 2.0m along with skew angles of 0-degree, 15 degree, 30degree and 45 degrees are considered. Key parameter such as bending moment, shear force and deflection are evaluated for each case. The results indicates that an increase in cushion thickness reduce stress and bending moments, while higher skew angles lead to increased stress concentration and torsional effects. The study concludes that proper selection of cushion thickness and skew angle is essential for safe and economical design of RCC Box culverts,

Keyword: STAAD, Railway Under Bridge (RUB), RCC Box, Skew, cushion height Civil Engineering, Design Study.

"Parametric study on rcc box for railway under bridge (rub) considering cushion thickness and skew angle connection with delhi railway line to nagpur", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.13, Issue 4, page no.l684-l733, April-2026, Available :http://www.jetir.org/papers/JETIRTHE2229.pdf

"Parametric study on rcc box for railway under bridge (rub) considering cushion thickness and skew angle connection with delhi railway line to nagpur", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.13, Issue 4, page no. ppl684-l733, April-2026, Available at : http://www.jetir.org/papers/JETIRTHE2229.pdf