Nonlinear finite element modelling and parametric study of CFRP shear-strengthened prestressed concrete girdersReportar como inadecuado


Nonlinear finite element modelling and parametric study of CFRP shear-strengthened prestressed concrete girders


Nonlinear finite element modelling and parametric study of CFRP shear-strengthened prestressed concrete girders - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Publication Date: 2014-12-16

Journal Title: Construction and Building Materials

Publisher: Elsevier

Volume: 76

Pages: 245-255

Language: English

Type: Article

Metadata: Show full item record

Citation: Qapo, M., Dirar, S., Yang, J., & Elshafie, M. Z. E. B. (2014). Nonlinear finite element modelling and parametric study of CFRP shear-strengthened prestressed concrete girders. Construction and Building Materials, 76 245-255.

Description: This is the accepted manuscript. The final version is available from Elsevier at http://www.sciencedirect.com/science/article/pii/S0950061814012872.

Abstract: This paper presents a three-dimensional nonlinear finite element (FE) model for prestressed concrete girders strengthened in shear with externally bonded carbon fibre reinforced polymer (CFRP) reinforcement. A total strain rotating crack model, where the crack direction changes with the change in the direction of the principal tensile stress, was used for the concrete. In this model, explicit modelling of the concrete shear behaviour after cracking, e.g. via a shear retention parameter, is not required as the crack plane is always a principal plane with no shear stresses. The FE model was validated using experimental results from the literature. An extensive parametric study was carried out to identify the effect of the concrete compressive strength, CFRP width-to-spacing ratio, CFRP thickness, girder effective depth, shear span to effective depth ratio, level of prestress, tendon profile, pre-cracking and CFRP-to-concrete interface model on the predicted shear force capacity. The results suggested that the predicted shear strength enhancement can be significant and increases with the increase in concrete compressive strength, CFRP width-to-spacing ratio, and CFRP thickness but decreases with the increase in girder effective depth and shear span to effective depth ratio.

Keywords: fibre reinforced polymer, finite element, girder, prestressed concrete, shear, strengthening

Sponsorship: The first author gratefully acknowledges the financial support of KRG.

Identifiers:

This record's URL: http://dx.doi.org/10.1016/j.conbuildmat.2014.11.068http://www.repository.cam.ac.uk/handle/1810/246799





Autor: Qapo, MichaelDirar, SamirYang, JianElshafie, Mohammed Z. E. B.

Fuente: https://www.repository.cam.ac.uk/handle/1810/246799



DESCARGAR PDF




Documentos relacionados