Structural behaviour of distressed and strengthened post-tensioned box beams

• Main Authors: Ohu, Rachael Bukola, Thanoon, Waleed Abdulmalik, Noorzaie, Jamaloddin, Abdul Kadir, Mohd Razali, Jaafar, Mohd Saleh
• Format: Article
• Language: English
• Published: ACC Limited 2009
• Online Access: http://psasir.upm.edu.my/id/eprint/16867/1/Structural%20behaviour%20of%20distressed%20and%20strengthened%20post-tensioned%20box%20beams.pdf; http://psasir.upm.edu.my/id/eprint/16867/; http://icjonline.com/apr2009.htm#2
• Institution: Universiti Putra Malaysia

This study focuses on the behaviour of post-tensioned box beams with snapped prestress cables. It also includes an investigation into the effectiveness of using select strengthening methods on distressed box beams. All beams were subjected to flexural-shear-torsional loads. The results show that snapping 15% of the prestressing cable area resulted in a 74% increase in deformation at service load and a 22% decrease in ultimate load. The snapping of prestress wires also increased the stresses in the snapped cables by 70%. All the strengthening techniques used effectively restored the beam performance at service and overcame the effect of cable snapping.