Skip to the main content

Preliminary communication

https://doi.org/10.14256/JCE.3734.2023

Approximate calculation of circular reinforced concrete columns with nomograms

Li Lu
Zhou Dong-hua
Shuang Chao


Full text: croatian pdf 1.317 Kb

page 1075-1082

downloads: 139

cite

Full text: english pdf 1.313 Kb

page 1075-1082

downloads: 288

cite


Abstract

Calculating the reinforcement of circular reinforced concrete (RC) columns involves not only the dual nonlinearity of the geometry and material but also the nonlinearity of the section width. Accurate solutions require iterative calculations. To develop the calculation method manually, the model column method was proposed to compute the second-order effect of the columns, and the strain method was used to calculate the ultimate strength of the sections analytically. The nomograms required to calculate the reinforcing steel content of the columns without iterations were obtained. The nomogram for calculating the section bearing capacity and reinforcing steel has three parameters (axial force, bending moment, and mechanical ratio of the reinforcing steel). Further, the nomogram for calculating the column bearing capacity and reinforcing steel has five parameters (axial force, bending moment, curvature, slenderness ratio, and mechanical ratio of the reinforcing steel), and the relationship between the five parameters can be expressed in a plan, which makes the application convenient. Finally, the calculation results of the nomograph were compared with those of the existing approximate calculation formulas and exact numerical methods, and the accuracy of the nomograms was verified.

Keywords

circular RC column; second-order effect; compression and bending members; reinforcement calculation; nomogram

Hrčak ID:

312986

URI

https://hrcak.srce.hr/312986

Publication date:

31.12.2023.

Article data in other languages: croatian

Visits: 849 *