Time-Dependent Nonlinear Analysis of Cable-Supported Prestressed Concrete Bridges

by Young-Jin Kang, Seoul Nat Univ, Seoul, Republic of Korea,
Jae-Seok Lee, Seoul Nat Univ, Seoul, Republic of Korea,

Document Type: Proceeding Paper

Part of: Computing in Civil and Building Engineering


A method of analysis and a computer program CFRAME for the material and geometric nonlinear analysis of cable-supported planar prestressed concrete bridges including the time-dependent effects due to load history, temperature history, creep, shrinkage, aging of concrete, and relaxation of prestress is described. The program, based on the finite element method using one-dimensional element, is capable of predicting the response of these structures throughout their various stages of construction and service load history, as well as through the elastic, cracking, inelastic, and ultimate ranges. Changes in boundary conditions and loads, installation and removal of frame elements, stressing, prestressing and removal of stay cables and prestressing tendons can be incorporated for modeling segmental bridge construction operations. Results from a cable-stayed bridge numerical example are presented to illustrate the analysis method and the capabilities of CFRAME.

Subject Headings: Cable stayed bridges | Concrete bridges | Cables | Prestressing | Time dependence | Prestressed concrete | Nonlinear analysis

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