Experimental analysis of covering layer-prestressed wire rope reinforced bridges

Authors

  • Dandan Hu Harbin University
  • Baozhen Yan Heilongjiang Province Highway Bridge Survey Design Co. Ltd.

DOI:

https://doi.org/10.14311/CEJ.2025.04.0035

Keywords:

Polyurethane cement-prestressed wire rope, Reinforced bridges, Comparative analysis, Load tests

Abstract

With the application of prestressed steel wire rope in bridge reinforcement project, mortar or composite mortar as the embedded material of steel wire rope is also gradually exposed to low strength, easy to crack, easy to fall off, and affect the durability of the wire rope and other shortcomings. Polyurethane-cement (PUC) composite, as a polymer concrete material, is characterized by light weight, high strength, high toughness, and good adhesion and corrosion resistance. In this paper, two kinds of reinforcement methods, PUC prestressed steel wire rope and prestressed steel wire rope, were used respectively, and the load test before and after reinforcement was carried out, and the effectiveness of the reinforcement methods was verified through the collection of parameter information, such as strain and deflection, before and after reinforcement. Although the PUC-strengthened bridge is less than the mortar-strengthened bridge each piece of girder arranged 15 pre-stressing steel wire rope, but the two bridges strengthened girder stiffness increase amplitude is comparable, under the action of the symmetrical load, the middle girder are increased by 13%, after the reinforcement of the bridge in the measured deflection to meet the highway load standard requirements of class Ⅱ. The PUC overlay layer has a good adhesion with the original beam body, and no cracks were found. However, the mortar overlay layer has cracks of varying degrees. The crack width is 0.15 mm, and the average spacing is approximately 150 mm.

 

Received:                                           05.12.2024

Received in revised form:                08.09.2025

Accepted:                                           06.11.2025

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Published

2025-12-31

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Section

Articles

How to Cite

Experimental analysis of covering layer-prestressed wire rope reinforced bridges. (2025). Stavební Obzor - Civil Engineering Journal, 34(4), 525-541. https://doi.org/10.14311/CEJ.2025.04.0035