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  Authors

Ms Swasti Prangyan Samantaray ,Prof Pravat Kumar Parhi,Dr H S Panda

  Keywords

Temperature, Creep, Shrinkage, PSC Bridge, Continuous Structure, Longitudinal deformation, Vertical deformation and Expansion joint.

  Abstract


There are many factors involved in the longitudinal deformation of a bridge, but the major factors to be considered are thermal induced movements, creep and shrinkage. Therefore, the effect of thermal stresses, creep, shrinkage and the resulting movements should be considered in the design process. However, due to the lack of rational design criteria, the design engineer cannot be certain that a structure is both safe and economical. Consequently, many uneconomical structures result due to either higher initial costs of over-design or the higher maintenance costs of under-design. There is a long term deflection in continuous Pre-stressed Concrete Girders (PSC) due to creep, shrinkage and daily atmospheric temperature variation, inhibiting lower load bearing capacity. It causes decrease in service life of bridge and in the long run requires strengthening with external pre-stressing to secure its original load bearing capacity. The uniform temperature change only causes change in axial length of the member while the temperature gradient causes bending deformations. In the present investigation, the effect of temperature, creep and shrinkage is analysed for continuousPSCgirderbridges of varying spans. Stresses and deformations developed in the structure due to creep shrinkage and temperature are analysed using MIDAS Civil analysis software. The bridge structures are analysed for maximum and minimum stresses, longitudinal displacement, vertical displacement and bending moments on various spans. From the above analysis, it is observed that there is a long term deformation due to time dependent factors and also considerable amount of stresses are developed in the structure. The longitudinal deformation increases with increase in number of spans for which appropriate expansion joints are required to be provided, while the vertical deflection, moments and stresses developed gradually stabilize with the increase in number of spans beyond five spans. It is also noticed that two spans continuity is the worst scenario where flexural moments developed due to various loads are comparatively higher than other span continuity.

  IJCRT's Publication Details

  Unique Identification Number - IJCRT1812271

  Paper ID - 186252

  Author type - Indian Author

  Page Number(s) - 349-359

  Pubished in - Volume 6 | Issue 2 | April 2018

  DOI (Digital Object Identifier) -   

  No Of Downloads - 1194

  Author Country - 751029, India, Bhubaneswar, Bhubaneswar, India, Science & Technology

  Publisher Name - IJPUBLICATION | www.ijcrt.org | ISSN : 2320-2882

  E-ISSN Number - 2320-2882

  Published Paper PDF : - http://www.ijcrt.org/papers/IJCRT1812271

  Published Paper URL: : - http://ijcrt.org/viewfull.php?&p_id=IJCRT1812271

  Published Paper PDF Downlaod: - download.php?file=IJCRT1812271

  Cite this article

Ms Swasti Prangyan Samantaray ,Prof Pravat Kumar Parhi,Dr H S Panda,   "EFFECT OF TIME DEPENDENT FACTORS ON CONTINUOUS PSC BOX GIRDER BRIDGE ", International Journal of Creative Research Thoughts (IJCRT), ISSN:2320-2882, Volume.6, Issue 2, pp.349-359, April 2018, Available at :http://www.ijcrt.org/papers/IJCRT1812271.pdf

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