Finite Element Analysis of Flexural Failure of High-Strength Reinforced Concrete Columns Harun Alrasyid, Muhammad Ali Rofiq, Data Iranata
Institut Teknologi Sepuluh Nopember
Abstract
At high-rise buildings, column has an important role to resist gravity and earthquake load. The utilization of high-strength concrete and high-strength steel rebar at high-rise buildings can reduce columns dimension at lower story. In this study, nonlinear finite-element analysis was carried out to model flexure behavior of high-strength reinforced concrete columns subjected to displacement-controlled monotonic loading and constant axial loading. There are two high-strength reinforced concrete column specimens with a 600x600x1800 mm column dimension that will be modeled using 3D finite-element analysis. The variables in this study are the axial loads. The axial load of 0.1Agfc and 0.33Agfc represents the low and high axial load on columns at high-rise buildings, respectively. The columns are designed with high-strength longitudinal reinforcement (fy=685 MPa), high-strength transverse reinforcement (fy=785MPa) and compressive strength of concrete of 70 MPa. Finite-element analysis is carried out with appropriate constitutive modeling of concrete and steel, material behavior parameters, geometric modeling, and mesh. The plasticity model was developed based on concrete damage plasticity models that can predict typical concrete behavior. The finite-element result showed that the prediction of the force-drift relationship curves are relative similar with the experimental results.
Keywords: concrete column, high-strength, non linear, finite-element analysis
Topic: International Symposium of Civil, Environmental, and Infrastructure Engineering
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