Design parameters for columns in the database that tested under axial compression.
Design parameters for columns in the database that were tested under axial compression: The table below presents the essential design variables in the general design of reinforced concrete columns. In this research, these variables play a crucial role in determining the requirements specified in international design codes and specifications. They provide a clear indication for any possible study on concrete columns. The table includes 13 variables in order: concrete section diameter, core diameter, cross-sectional area, the radius of the concrete section, column length, length-to-radius ratio, longitudinal reinforcement ratio, tensile strength of longitudinal bars, elasticity modulus of longitudinal bars, transverse reinforcement ratio, tensile strength of transverse reinforcement, elasticity modulus of transverse reinforcement, and concrete strength. The samples were carefully and precisely collected from various research conducted by previous researchers. All of these samples are from the period starting from 2013 up to 2023, with the vast majority of them being recent samples, specifically from 2018 to 2023. Older research and studies that only used longitudinal reinforcement or samples that did not simulate real-world conditions and code recommendations were avoided. Furthermore, samples with other types of fibers were also excluded because the latest American code is exclusively tailored for GFRP while awaiting future specifications for other fiber types reinforcements. It is worth noting that GFRP is the most common and widely used type in researchs focusing on transitioning from traditional reinforcement to fiber reinforcement in the future. Not many columns reinforced with basalt or aramid fibers were encountered during the collect data from researchs. However, it is acknowledged that there are numerous studies on carbon-FRP (CFRP), and despite this, GFRP remains the most prevalent among all other types. Other fiber types, such as Kevlar, undergo the manufacturing process and are studied, but there aren't many extensive studies on them. This study collected 165 fully reinforced concrete columns with glass fiber-reinforced polymer (GFRP), including 100 circular columns and 65 square columns. All these columns are subjected to axial compression loads. Five variables were targeted from among these variables below, as they are considered the most influential factors in the design of concrete columns. In addition to that, five statistical variables were introduced to provide a comprehensive overview of these samples to the reader. These variables are the minimum value, maximum value, standard deviation, mean, and coefficient of variation. I hope they will be beneficial to researchers in the future. Sincerely, [Mohamed Qassim Kadhim].