ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Stochasticity on Long-Term Behavior of Steel-/Carbon Fiber-Reinforced Polymer Prestressed Girders

Author(s): Yail J. Kim and David Micnhimer

Publication: Structural Journal

Volume: 118

Issue: 2

Appears on pages(s): 33-47

Keywords: carbon fiber-reinforced polymer (CFRP); long-term; modeling; prestressing; stochastic

Date: 3/1/2021

Abstract:
This paper presents the long-term behavior of bridge girders prestressed with steel strands and carbon fiber-reinforced polymer (CFRP) tendons, based on a stochastic process called polynomial chaos expansion (PCE). Benchmark girders are designed pursuant to existing specifications, and their time-dependent responses are predicted up to 100 years by the incremental time steps and modified step function methods, alongside variable performance levels dependent upon the extent of corrosion. The loss of prestress in the steel-prestressed girders is influenced by the degree of corrosion current density up to 45.4%, while the loss of the CFRP-prestressed girders is stable at a maximum of 15.5%. The geometric configuration of the girders dominates the sensitivity of the flexural capacity when subjected to corrosion. The deflections of both steel and CFRP-prestressed girders, including the corrosion-damaged cases, are within the limit of the American Association of State Highway Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications. Published design provisions on the camber and deflection of those girders are assessed. Additional practical interests lie in the evaluation of deformability for the CFRP-prestressed girders.


ALSO AVAILABLE IN:

Electronic Structural Journal



  

Please enter this 5 digit unlock code on the web page.