Optimization of RC chimney design under multivariate loads: some insights by abaqus simulations

Abstract

This research is an FEA of the RC chimney at the NMDC Steel Plant, Bastar, done through Abaqus. The structural evaluation takes wind load (44 m/s for the current plant) and reduction in temperature load up to 28\(^{\circ }\)C as per the guidelines of All India Basic Wind Speed into account. A detailed mesh convergence analysis was conducted, establishing an ideal mesh size of 1 mm, and a time step of 0.002 s was used for precise and effective simulation. The numerical values show the maximum displacement to be 27.56 mm and the maximum stress to be 7.414 \(\times\) 10⁵ MPa and the temperature is also within the ambient temperature which is 28 degree. All the result are within allowable limits for structural integrity. The analysis and checks has done by in accordance to IS 4998-2015. The analysis proves that the RC chimney is structurally sound under all the loading conditions applied. The present study brings out the necessity of precise FEA modeling and appropriate load combination considerations in providing long-term structural integrity to industrial chimneys. The results show the successful application of numerical modeling in simulating RC chimney behavior under wind and temperature actions, providing useful experience for future design, maintenance, and safety inspections of similar structures.