Experimental study on shear behavior of hollow slab beam strengthened with pasting steel plates

Jiawei Wang (Liaoning Communication Planning and Design Institute Co., Ltd, Shenyang, China)
Jinliang Liu (School of Civil Engineering, Northeast Forestry University, Harbin, China)
Guanhua Zhang (Liaoning Communication Planning and Design Institute Co., Ltd, Shenyang, China)
Jigang Han (Liaoning Communication Planning and Design Institute Co., Ltd, Shenyang, China)

International Journal of Structural Integrity

ISSN: 1757-9864

Publication date: 17 June 2020

Abstract

Purpose

Considering the “size effect” and the properties degradation of building materials on the strengthened engineering, in this paper, the technology of pasting steel plate was adopted to shear strengthen a 16 m prestressed concrete hollow slab, which had serviced 20 years in cold regions. The shear properties of shear strengthen beams are analyzed.

Design/methodology/approach

Shear loading test of the shear strengthened beam and the contrast beam was conducted. Then the mechanical characteristics, failure mechanism, the mechanical response and shear capacity of shear strengthened beam and contrast beam had been discussed.

Findings

The failure mode of shear strengthened beam and contrast beam was shear compression failure, and the bond failure between concrete and prestressed reinforcement happened in both of test beams. The shear strengthening method of pasting steel plate can effectively improve the mechanical response for the shear strengthened beam. Compared with the contrast beam, the cracking load and failure shear capacity for the shear strengthened beam can be effectively increased by 12.2 and 27.6%, respectively.

Originality/value

The research results can be a reference for the detection and evaluation of shear strengthened bridges, which are strengthened by pasting steel plate. Engineers can refer to the shear strengthening method in this paper to strengthen the existing bridge, which can guarantee the safety of shear strengthened bridges.

Keywords

Acknowledgements

This study was supported by “the Fundamental Research Funds for the Central Universities.” Conflict of interest: The authors declare that there are no conflicts of interest regarding the publication of this article.

Citation

Wang, J., Liu, J., Zhang, G. and Han, J. (2020), "Experimental study on shear behavior of hollow slab beam strengthened with pasting steel plates", International Journal of Structural Integrity, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/IJSI-04-2020-0038

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Emerald Publishing Limited

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