A prestressing tendon element and its application to segmental prestressed concrete box girders | |
| Author | Prapat Tantiprabha |
| Call Number | AIT Thesis no.ST-81-12 |
| Subject(s) | Tendons (Prestressed concrete) Box beams |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering. School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | A prestressing tendon element, which can simulate accurately the stiffness and prestressing effect of any smooth curved tendon perfectly bonded in a bilinear degenerated shell element, is developed, The tendon element is treated as being an intrinsic part of the concrete host element so that no physical nodes are required to model the tendon. The stiffness of the tendon element is expressed as an equivalent stiffness associated with the degree-of-freedom of the host element. The prestressing force, including friction, is treated by considering equilibrium of each differential element of the tendon. Numerical tests on the element using three points to define the tendon geometry show that satisfactory accuracy is obtained with three Gauss Points Integration Scheme . Convergence is much faster compared to the simple straight truss bar discretization. The proposed element is applied in conjunction with a four-noded bilinear degenerated shell element to analyze a segmentally erected prestressed concrete box girder. The effects of prestressing and erection at different stages on the stress distributions and deflections of the girder are examined. Shear lag from prestressing is found to be quite significant. |
| Year | 1981 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Worsak Kanok- Nukulchai ; Panitan Lukkunaprasit |
| Examination Committee(s) | Loo, Yew-Chaye |
| Scholarship Donor(s) | The Government of the Federal Republic of Germany |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1981 |