Research on strengthening stone arch bridge with CFRP rebars

Abstract

Purpose

This paper aims to describe carbon fiber reinforced plastics (CFRP) bars as a way to strengthen a 40-year-old stone arch bridge. To investigate effectiveness of the strengthening method, fielding-load tests were carried out before and after strengthening.

Design/methodology/approach

High-strength CFRP bars with minor radius, high tensile strain and good corrosion resistance were used in this reinforcement. The construction process for strengthening with CFRP bars – including CFRP bars cutting, crack grouting, original structural surface treatment, implant drilling, CFRP bars installation and pouring mortar – was described. Ultimate bearing capacity of the bridge after strengthening was discussed.

Findings

The results of concrete stress and deflection show that the strength and stiffness of the strengthened bridge are improved. The strengthened way with CFRP bars is feasible and effective.

Originality/value

This paper describes CFRP bars as a way to strengthen a 40-year-old stone arch bridge.

Citation

Zhang, K., Li, D., Shen, X., Hou, W., Li, Y. and Xue, X. (2023), "Research on strengthening stone arch bridge with CFRP rebars", International Journal of Building Pathology and Adaptation, Vol. 41 No. 5, pp. 1014-1028. https://doi.org/10.1108/IJBPA-07-2021-0097