Computers and Concrete

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Software for application of Newton-Raphson method in estimation of strains in prestressed concrete girders

  • Received : 2011.02.18
  • Accepted : 2011.12.08
  • Published : 2012.08.25
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Abstract

Structures suffer from damages in their lifetime due to time-dependant effects, such as fatigue, creep and shrinkage, which can be expressed by concrete strains. These processes could be seen in the context of strain estimation of pre-stressed structures in two phases by using numerical methods. Their aim is checking and validating existing code procedures in determination of deformations of pre-tensioned girders by solving a system of nonlinear equations with strains as unknown parameters. This paper presents an approach based on the Newton-Raphson method for obtaining the stresses and strains in middle span section of pre-stressed girders according the equilibrium state.

Keywords

Acknowledgement

Supported by : Ministry of Education and Science

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