Design of Round Reinforced-Concrete Columns

Tayem, A.; Najmi, Abdelqader

doi:10.1061/(asce)0733-9445(1996)122:9(1062)

Cited by 3 publications

(2 citation statements)

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“…The clear spacing between rebars s clear is therefore calculated by Equation (13); the angle between each adjacent rebar θ r is calculated by Equation ( 14):…”

Section: Structural Analysis Of a Reinforced Circular Concrete Sectio...mentioning

confidence: 99%

“…The work of Ahmed et al [12] and Tayem and Najmi [13] concerned with the optimal design of circular reinforced concrete columns using a nonlinear optimization approach to minimize the material cost considering constraints on axial load capacity, bending capacity, and maximum steel ratio. The hybrid optimization algorithm was also used to minimize the total material cost and for predictive modeling of circular reinforced Research on the optimization of reinforced concrete columns shows the evolution of optimization methods, from linear programming to nonlinear programming [1] to genetic algorithms [2] and particle swarm optimization [3].…”

Section: Introductionmentioning

confidence: 99%

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Sustainable Design of Circular Reinforced Concrete Column Sections via Multi-Objective Optimization

Jelušič,

Žula

2023

Sustainability

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An optimization model for reinforced concrete circular columns based on the Eurocodes is presented. With the developed optimization model, which takes into account the exact distribution of the steel reinforcement, which is not the case when designing with conventional column design charts, an optimal design for the reinforced concrete cross section is determined. The optimization model uses discrete variables, which makes the results more suitable for actual construction practice and fully exploits the structural capacity of the structure. A parametric study of the applied axial load and bending moment was performed for material cost and CO2 emissions. The results based on a single objective function show that the optimal design of the reinforced concrete column cross section obtained for the material cost objective function contains a larger cross-sectional area of concrete and a smaller area of steel compared with the optimization results when CO2 emissions are determined as the objective function. However, the optimal solution in the case where the material cost was assigned as the objective function has much more reserve in axial load capacity than in the optimal design where CO2 was chosen as the objective function. In addition, the multi-objective optimization was performed to find a set of solutions that provide the best trade-offs between the material cost and CO2 emission objectives.

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“…The clear spacing between rebars s clear is therefore calculated by Equation (13); the angle between each adjacent rebar θ r is calculated by Equation ( 14):…”

Section: Structural Analysis Of a Reinforced Circular Concrete Sectio...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sustainable Design of Circular Reinforced Concrete Column Sections via Multi-Objective Optimization

Jelušič,

Žula

2023

Sustainability

View full text Add to dashboard Cite

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Ultimate Moment Capacities of Round Prestressed Concrete Poles

Liu

2000

J. mech.

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An alternative technique for the determination of ultimate moment capacities of round prestressed concrete poles is presented in this paper. The traditional concrete compression area of poles is determined using the conventional iterative design process, the compatibility and equilibrium approach. Moreover, the area of annulus defined by the neutral axis is multiplied by an area reduction factor. It is possible to use numerical methods to calculate the centroid of the reduced annulus. However, the concrete compression zone and strain variation in the longitudinal reinforcement makes the calculation awkward. This paper addresses the problem from a different perspective. No reference to area reduction factor is required in the course of locating the neutral axis. The results are compared in a very satisfactory manner with that obtained using PCI approach. The purpose is to provide formulations that can be easily computerized and implemented on relevant software for the design of round prestressed concrete poles.

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