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| Graph algorithm for non-uniform reinforcement of circular section of reinforced concrete |
| Received:June 18, 2020 Revised:August 12, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20200618002 |
| KeyWord:circular section strain area non-uniform reinforcement nomogram dimensionless calculation |
| Author | Institution |
| 罗莎 |
昆明理工大学 建筑工程学院, 昆明 |
| 周东华 |
昆明理工大学 建筑工程学院, 昆明 |
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| Abstract: |
| A circular section is one of the section forms of a structural member used in engineering,but it is difficult to calculate the reinforcement of a circular section,which has double nonlinearity (the nonlinearity of material and section width variation).The "Code for Design of Concrete Structures" only gives the transcendental equations for calculating the uniform reinforcement,which must be solved iteratively and cannot be calculated manually.In addition,some members with circular cross-section (such as piers,prefabricated piles and cast-in-place pile of pile foundation,etc. ) have usually large cross-section size,length and large area of the reinforcement.If the uniform reinforcement is adopted,the stress of the reinforcement near the neutral axis is small and its strength cannot be fully and economically used.If a non-uniform reinforcement is used,the area of reinforcement can be greatly saved and the strength of reinforcement and concrete can be fully used.In this paper,stresses are calculated by strains and then the internal forces are calculated to derive the formula for calculating the circular section reinforcement.Finely a dimensionless nomogram to calculate the reinforcement is drawn.By using the nomogram,the reinforcement can be calculated quickly by hand.The diagram has strong universality and can be used for any concrete strength below C50 and any diameter of the cross-section.It is a practical tool for quick calculation of the reinforcement. |
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