Finite element analysis of behavior and ultimate strength of composite column

Abstract

Composite sections are found to be a novel technique in modern day scenario of construction. This stands tall than the ordinary and conventional type of constructions. Columns as a structural element play a vital role in structural frame. This research comments on the behavior of composite columns. The main objective of this study is to analyze the behavior of steel-encased concrete composite columns as experimentally under axial compression and the mode of failure under ultimate failure and yield point. The steel-concrete composite system combines the formability and rigidity of reinforced concrete with the ductility and strength of structural steel to meet the demand for earthquake-resistant constructions. Three specimens were chosen for this study: one was a composite column, the other two were ordinary RC columns and structural steel columns. The raw materials' natural properties are assessed. As a result, material testing for cement, fine aggregate, and coarse aggregate was completed, as well as a concrete mix design. A comparative analysis of the local and post-local buckling behavior of different composite sections has been studied and the column sections have been designed according to Eurocode 4 (ENV 1994) to determine the plastic resistance of the section. These three specimens underwent compression test and the results are tabulated and compared. The corrosion resistance and fireproof nature (resistance to fire at higher temperatures) that are transmitted into the member are related to the steel being encased within the concrete. These are the two major drawbacks of any steel construction combined with an earthquake-resistant structure. Rather than a traditional steel construction, earthquake structures benefit from this type of load handling capabilities. The portion can be used before it completely collapses if proper design factors are taken into account.

Structural Performance of Reinforced Concrete Columns with Bracing Reinforcement

“…The strength, ductility, and stiffness of columns with these types of reinforcement were enhanced. Ayyasamy et al [13] investigated empirically and numerically the performance of composite columns encased by steel. The investigation results revealed that the composite column encased by steel had more strength than the conventional RC column and I-steel column.…”

Variation Study of the Construction Cost of a 15-Story R/C Building Based on the Seismic Risk Zone

“…This means that the elements of the load-bearing body under the design earthquake ensure minor and repairable damages [32]- [38]. Furthermore, they minimize the damages for earthquakes of lower intensity and with a higher probability of occurrence, when imposing the "design" seismic actions with an acceptably small probability of exceeding them during the life of the structure [39], [40]. With the flexural yielding of critical areas, i.e., the formation of plastic joints, the load-bearing body is able to turn into an elastoplastic mechanism, which continues to respond to the peaks of seismic movements with prac-tically constant intensity, releasing in each cycle a significant part of the seismic energy it has absorbed [20], [32], [34], [41]- [44].…”