A Simplified Analytical Model for Performance Evaluation of Externally Prestressed Concrete End Blocks
IR@SERC: CSIR-Structural Engineering Research Centre, Chennai
View Archive Info| Field | Value | |
| Title |
A Simplified Analytical Model for Performance Evaluation of Externally Prestressed Concrete End Blocks
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| Creator |
Lakshmanan, N.
Saibabu, S. Ramachandra Murthy, A. Chitra Ganapathi, S. Jayaraman, R. Senthil, R. |
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| Subject |
Concrete end blocks
Buried sifcon cylinderical structures Steel structure Friction Corrosion Reinforced concrete |
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| Description |
The strengthening of bridges using external cables requires additional brackets to be attached
to girders in order to anchor the external cables. The behaviour of the anchorage comprising
of a steel bracket with high tensile expansion type anchor bolts is extremely complex. A
simplified analytical model is attempted in this paper for approximately evaluating the
structural load behaviour of the loaded steel bracket with respect to the end block of posttensioned
beam. The expansion type anchor bolt is firmly anchored to concrete by friction
developed by expanded sleeves. Yield and ultimate loads are computed based on
force/moment equilibrium equations. Deformation analysis is carried out based on the
assumption that the ratio of axial deformation to vertical deformation of anchor bolt would
follow the same ratio at the corresponding forces such as yield and ultimate. To validate the
proposed technique, an experimental investigation is carried out on post-tensioned end
blocks. Slip and slope of steel bracket are the measured at various loading stages during the
experiment. It is observed that the computed slip and slopes are in good agreement with the
corresponding experimental observations.
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| Date |
2009
2009 2008 |
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| Type |
Conference paper
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| Identifier |
Proceedings of the Sixth Structural Engineering Convention, SERC 2008, 18-20 December 2008, p.545-554. Jointly Organised by Structural Engineering Research Centre, Indian Institute of Technology, Anna university, Chennai.
http://hdl.handle.net/123456789/275 |
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| Language |
en
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