• This involves prestressing the columns with external strands to provide active confinement.
• It is efficient and can be more economical than steel jacketing.
• Installation of such a system can be less disturbing to building occupants.
• The technique is newly developed and on-site implementation is not known.
• Shear strength increase is only due to increase in concrete strength against the jacketing, where the jacket contributes significantly toward shear strength.
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