Experimental and numerical study of hollow core slabs strengthened with mounted steel bars and prestressed steel wire ropes

Li, Xinghua; Wu, Gang; Popal, Mohammed Shafiq; Jiang, Jianbiao

doi:10.1016/j.conbuildmat.2018.08.073

Cited by 31 publications

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fiber composite material bonding strengthening method cannot overcome the brittle failure characteristics of the components (Xun et al, 2022). Finally, the external prestressed strengthening method has a complex construction process that significantly impacts traffic (Li et al, 2018). Therefore, the development of high-performance materials to strengthen existing RC hollow slab beams will be one of the effective ways to solve the above problems.…”

Section: Introductionmentioning

confidence: 99%

Effect of interface treatment on the flexural performance of existing RC bridge beams strengthened with UHPC

Song,

Li,

Kong

et al. 2024

Front. Mater.

View full text Add to dashboard Cite

As one of the most innovative cement-based materials, ultra-high performance concrete (UHPC), with excellent durability and mechanical properties, has been widely used in strengthening existing bridges. In this study, in-situ four-point bending tests were carried out to investigate the flexural behavior of precast reinforced concrete (RC) hollow slab beams in service for 15 years strengthened with UHPC. Among them, three hollow slab beams were strengthened with UHPC, and the interface treatment was chiseling, planting rebars, and a combination of chiseling and planting rebars, respectively. The remaining one without any strengthening treatment was used as the control specimen. To evaluate the enhancement effect of different interface treatments on UHPC-strengthened beams, the cracking load, ultimate load, crack development and failure modes of UHPC-strengthened beams were analyzed. Results indicated that the stiffness, deflection capacity and flexural capacity of UHPC-strengthened beams was significantly improved. Meanwhile, the stiffness of UHPC-strengthened beams in the pre-damage stage was increased by 49%–94%, when compared with the unstrengthened beam. Correspondingly, the ultimate flexural capacity was increased by 29%–38%. The interface chiseling treatment was more favorable to enhance the deformation capacity of UHPC-strengthened beams. The interface planting rebar treatment was more favorable to enhancing the ductility of UHPC-strengthened beams. The crack development was effectively suppressed by the interface chiseling and planting rebars together. This contributes to a higher load capacity reserve for UHPC-strengthened beams. The bearing capacity under serviceability limit state of the UHPC-strengthened beams was increased by 1.25, 2, and 2.5 times through the interface treatments of chiseling, planting rebars, and a combination of both, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of interface treatment on the flexural performance of existing RC bridge beams strengthened with UHPC

Song,

Li,

Kong

et al. 2024

Front. Mater.

View full text Add to dashboard Cite

show abstract

“…Steel wire rope, which featured with good flexibility as well as its availability and its cheap price is suitable for use as a strengthening material for many structural members [16,17].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2023

Inf. Sci. Lett.

View full text Add to dashboard Cite

In this paper, the torsional behavior of strengthened beams, which were subjected to constant and incremental repeated loads is studied. Repeated loads have a negative effect on the strength of beams as they reduce the beam's resistance to external loads. External strengthening is usually used to increase the strength of beams for different applied loading. The near-surface mounted technique is a type of strengthening recently used to improve the strength of beams. The experimental program includes testing of twelve beams. All beams have the same dimensions and the same reinforcement. Nine of those beams are strengthened with different configurations of steel wire rope, and three beams are non-strengthened (reference beams). The results show that the decreasing of the spacing between wires (increasing the amount of steel wires) leads to an increase in the beam torsion strength and a decrease in the twist angle of beams. All strengthened beams show high resistance to the repeated load, especially constant repeated load, the increased torsional capacity has reached to 181.12% in beams under constant repeated load compared to the related beam subjected to monotonic load.

show abstract

“…This problem can be solved by replacing the composite mortar with polyurethane cement (PUC) because PUC has the advantages of high strength and toughness. The prestressed steel wire rope (PSWR) strengthening method is an innovative active strengthening method that anchors steel wire ropes on the beam and tension is applied [39,40]. It is easy to apply tension because of the small diameter of the steel wire rope [41,42], so tensioning construction can be carried out with simple devices.…”

Section: Introductionmentioning

confidence: 99%

Static Load Test Analysis of T-Beam Bridge Shear Strengthening by Prestressed Steel Wire Rope Embedded in Polyurethane Cement (PSWR-PUC)

Liu

Jian

et al. 2023

Sustainability

View full text Add to dashboard Cite

Many bridges suffer from aging and deterioration problems and need to be strengthened. PSWR-PUC is an emerging structural strengthening technology that enhances the load-bearing capacity of concrete bridges by embedding prestressed steel wire ropes into polyurethane cement. This paper focuses on investigating the shear reinforcement effectiveness of PSWR-PUC. Firstly, the composition of PSWR-PUC is introduced. Subsequently, two T-beam bridges in similar service condition are selected, and shear strengthening schemes involving PSWR-PUC and externally bonded steel plates are devised. Lastly, static loading tests are conducted, and the deflection and strain data of the two bridges before and after reinforcement intervention are analyzed. The results indicate that both strengthening methods improve the bridge load-carrying capacity. However, compared to the bridge strengthened with the externally bonded steel plate method, the deflections in the bridge strengthened with PSWR-PUC decreased by 36.8% and 42.1%, the strains decreased by 18% and 23%, and the shear stiffness was improved to a greater extent. These results verified that the PSWR-PUC strengthening method is effective for improving structural capacity and performance. This study will contribute to an in-depth understanding of the performance characteristics and application scope of PSWR-PUC shear strengthening technology, and it provides a scientific basis and guidance for practical engineering applications.

show abstract

Experimental and numerical study of hollow core slabs strengthened with mounted steel bars and prestressed steel wire ropes

Cited by 31 publications

References 14 publications

Effect of interface treatment on the flexural performance of existing RC bridge beams strengthened with UHPC

Effect of interface treatment on the flexural performance of existing RC bridge beams strengthened with UHPC

Untitled

Static Load Test Analysis of T-Beam Bridge Shear Strengthening by Prestressed Steel Wire Rope Embedded in Polyurethane Cement (PSWR-PUC)

Contact Info

Product

Resources

About