On-Site Manufacturing Method for Pre-Tension U-Type Pre-Stressed Concrete Girders and Analytical Performance Verification of Anchoring Blocks Used for Applying Tension Force

Round 1

Reviewer 1 Report

In this manuscript, in this study, author used the on-site pre-tension method integrating the internal reaction arm, to investigate the resistance of the U-type girder bridge at the aim to reduce the weight and the extensive use of material by decreasing the cross-section of the girder. Which is made of concrete deck slab reinforced with composite material. From results presented in the current manuscript, authors reported a remarkable improvement of the resistance and rigidity compared to PSC I-type.

In the opinion of the reviewer, the paper can be recommended for publication in applied science Journal after revisions listed below:

- Analyzing the introductory section, it appears that few new references are cited. It is better to analyze new research 2020-2022 rather than many references from early 2000. The aim here is to see if other researchers already investigated the resistance of U-type girder bridges.

- Add references to the figure 1, 2 and 3

- Sections 2 and 3: it is not clear, if the authors have started to present their work or if it is a state of the art.

- If these sections are a bibliography references need to be added to figure 3 and 5.

- The quality of Figure 7 needs to be improved. It is not possible to see the range of values of applied loads such as shear forces and bending moments.

- Figure 7 d and 7.e what type of moment? (Bending moment for example).

- In the discussions of figure 7. Authors specified the maximum values of displacement, shear force and moment but they do not say if these values are acceptable or not compared to any limit.

- The quality of figure 8 need to be improved or added as supplementary file with bigger scale.

- In Section 3.2.1, the authors should add a description of the mesh used in their model and whether there is a fine mesh and the type of mesh. However, the sensitivity of the mesh must be checked at the aim to ensure the accuracy of results.

- Figure 11. Usually, for steel materials, yield stress versus plastic strain is a curve. Why does this figure contain two segments instead of being a curve?.

Author Response

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Author Response File: Author Response.docx

Reviewer 2 Report

Overall good manuscript! But modifications are required to improve the quality.

Poor literature review. Authors need to discuss latest papers/chapters discussing similar conducted research.

It's not clear whether presented input data has been measured by authors or obtained from literature.

Good technical analysis, yet lack of scientific interpretations of found results (interactions between elements, characterization etc....)

It would be good to add a part discussing real life applications of discussed specimens.

Author Response

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Author Response File: Author Response.docx

Reviewer 3 Report

Please  find some minor comments in the attachment.

Comments for author File: Comments.pdf

Author Response

Please see the attachment.

Author Response File: Author Response.docx