USING THE FINITE ELEMENT METHOD TO ANALYSIS THE EFFECT OF ECCENTRICITY LOADS

Abstract

Since it transmits the loads from the slabs and beams to the foundation, the column is typically thought of as the fundamental structural component of the building. Building columns may be constructed to antiquated requirements, making them susceptible to damage from natural calamities like storms or earthquakes. Numerous experimental investigations on typical damaged and undamaged concrete columns have demonstrated the benefits of the strengthening methods mentioned above. ABAQUS 2022 software was utilized for modeling in this numerical study, which simulates an experimental operation with nine columns, one of which was loaded to failure and is regarded as a control column. Each specimen in the finite element model is made up of an upper and lower end plate, a concrete core, a stainless steel pipe, and reinforcement in between the pipe and the end plates. S4R elements from ABAQUS imitate the stainless steel pipe and stiffeners, whereas C3D8R elements simulate the concrete core and end plates. When simulating the interaction between concrete and stainless steel pipe, the primary surface is described as the interior of the stainless steel pipe, with core concrete serving as a representation of the secondary surface. The discretization of the primary surface network is configured to be the same as that of the secondary surface, and the nodes of the primary and secondary surfaces coincide, reducing the likelihood of node intersection and ensuring good computational accuracy and model convergence. Based on the convergence study, the unit grid discretization is adjusted to 16 mm to balance calculation efficiency and accuracy.