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Improved Design Algorithm for Rectangular Beam Sections with Confined Concrete
The flexural capacity of reinforced concrete members can be greatly improved if these members are confined by closely spaced rectangular steel hoops. On the other hand, in structural design, the ultimate strength calculations of reinforced concrete sections are generally made on the basis of the yield strength of reinforcement, neglecting strain hardening in steel. This is a conservative approach. However, if strain hardening is taking place the calculated value of the neutral axis depth based upon the yield strength will be less than the actual value; and the use of an underestimated value of the neutral axis depth will result in an overestimated ultimate curvature and consequently rotational capacity of the relevant plastic hinge. In such a case, the reliability of limit design and seismic design may be affected unfavorably. In this context, behavior models can be developed for confined concrete, and for steel including the strain hardening effects. Based upon these models a reliable and accurate algorithm can be developed for analysis and design.
Improved Design Algorithm for Rectangular Beam Sections with Confined Concrete
The flexural capacity of reinforced concrete members can be greatly improved if these members are confined by closely spaced rectangular steel hoops. On the other hand, in structural design, the ultimate strength calculations of reinforced concrete sections are generally made on the basis of the yield strength of reinforcement, neglecting strain hardening in steel. This is a conservative approach. However, if strain hardening is taking place the calculated value of the neutral axis depth based upon the yield strength will be less than the actual value; and the use of an underestimated value of the neutral axis depth will result in an overestimated ultimate curvature and consequently rotational capacity of the relevant plastic hinge. In such a case, the reliability of limit design and seismic design may be affected unfavorably. In this context, behavior models can be developed for confined concrete, and for steel including the strain hardening effects. Based upon these models a reliable and accurate algorithm can be developed for analysis and design.
Improved Design Algorithm for Rectangular Beam Sections with Confined Concrete
A. Guenduez (author)
1990
3 pages
Report
No indication
English
Structural Analyses , Construction Materials, Components, & Equipment , Construction Equipment, Materials, & Supplies , Algorithms , Beams(Supports) , Reinforced concrete , Structural design , Stress analysis , Structural steels , Ultimate strength method , Flexural strength , Strains , Reinforcement(Structures) , Hardening(Materials)
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