Study on the Impact Resistance of FRP Pasted onto a Blastproof Partition Wall under Out-of-Plane Repeated Impact Load
Round 1
Reviewer 1 Report
This paper investigates the impact resistance of FRP pasted to the blastproof partition wall under out-of-plane repeated impact load. This research falls within the scope of the Journal. However, after reading carefully the manuscript, I agree to its publication in condition to Major Revision. Despite considerable works made in this study, I believe this paper lacks sufficient explanations of: (1) literature review, (2) novelty, (3) methodology and (4) results discussion. Specific reasons are stated in the following:
1. The literature review needs to be enhanced to show the limitations of the previous studies.
2. The novelty and necessity of this paper are questionable. They should be clearly presented in the last paragraph of introduction section of the revised paper.
3. Only one reference published in 2022 was reviewed in this study. It is suggested that more relevant studies published in 2022 be cited in the revised paper.
4. There are some grammatical errors in the text. For instance, page 2, line 71, "FRP reinforced reinforced” should be replaced by "FRP-reinforced reinforced”. Please check whole manuscript to resolve these issues.
5. In an academic text, some explanations should be provided below each title and sub-title. Please add some explanations under all titles and sub-titles to briefly describe the content of the title and sub-title (For instance, 2. Experimental contents).
6. Figure 1 should be replaced by a better color figure.
7. In Table 1, it seems that all Impact parameters provided for all specimens are the same. If it is correct, so there is no need to provide the Impact parameters in the table. Just describe them in the text. Accordingly, Table 1 will be shortened.
8. A figure should be added to the revised paper to show all specimens described in Table 1.
9. The details of the glue used to bond the FRP sheet to the wall should be presented in the revised paper.
10. The position and direction of strain gauges used to measure the strain data should be explained in Section 2.3.
11. The details of the finite element model developed in this study are vague. For instance, type of element, number of elements, model boundary conditions, interaction between the components, model loading, type of analysis and time step should be fully provided in the revised paper.
Author Response
Thanks very much for your comments. We have changed one by one according to your comments.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
attractive. I think, this manuscript lacks from the below comments:
1. The language should be double-checked. I have seen several mistakes, and this article should proofread during the possible revision. After a double-check of the English used to try to avoid any typographical error.
2. The introduction and literature review section should be improved. Bring along as much as you can the baseline scientific proof for the knowledge you are going to explore in further sections. The literature is better to be updated based on the most recent works. In that, I suggest using the novel technique in predicting engineering complex problems, similar to your case of study. Following relevant novel intelligent works and ideas into your work.
I. Predicting Electrical Power Output of Combined Cycle Power Plants Using a Novel Artificial Neural Network Optimized by Electrostatic Discharge Algorithm, Measurement, 2022,198,111405
II. Subset simulation with adaptable intermediate failure probability for robust reliability analysis: An unsupervised learning-based approach. Structural and Multidisciplinary Optimization, 2022
III. Predicting Compressive Strength of Manufactured-Sand Concrete Using Conventional and Metaheuristic-Tuned Artificial Neural Network. Measurement, 2022,194:11093.
IV. Efficient metaheuristic-retrofitted techniques for concrete slump simulation. Smart Structures and Systems,27 (5), 745-759.
V. Predicting the splitting tensile strength of concrete using an equilibrium optimization model. Steel and Composite Structures, 2021,39(1): 81-93.
Author Response
Thanks very much for your comments. We have changed one by one according to your comments.
Point 1: The language should be double-checked. I have seen several mistakes, and this article should proofread during the possible revision. After a double-check of the English used to try to avoid any typographical error.
Authors: Thanks very much for your comments.
Reply: We checked the whole article and revised it.
Point 2: The introduction and literature review section should be improved. Bring along as much as you can the baseline scientific proof for the knowledge you are going to explore in further sections. The literature is better to be updated based on the most recent works. In that, I suggest using the novel technique in predicting engineering complex problems, similar to your case of study. Following relevant novel intelligent works and ideas into your work.
Authors: Thanks very much for your comments.
Reply: We 've already cited the reference and checked the whole article, changed the order of the literature.
Response 2:
- Subset simulation with adaptable intermediate failure probability for robust reliability analysis: An unsupervised learning-based approach. Structural and Multidisciplinary Optimization, 2022,65:172.
- Predicting the splitting tensile strength of concrete using an equilibrium optimization model. Steel and Composite Structures, 2021,39(1): 81-93.
Swesi et al. [11] conducted a lateral impact load test on twenty carbon fiber reinforced polymer (CFRP)coated reinforced concrete columns. CFRP reinforcement can improve its resistance, but largely depends on the internal structure of the CFRP fiber material. Pham et al. [12] used FRP for flexural reinforcement of beams, and U-shaped FRP reinforcement method has better impact resistance and bending resistance than the vertical FRP reinforcement method. Under the action of impact load, CFRP bonded concrete structures are more sensitive to local defects, and the damage caused by CFRP failure may be more serious [13-14].
Cho et al. [15] completed the drop hammer impact test of seven reinforced concrete beams reinforced with carbon fibers and steel fibers, and the results showed that the flexural bearing capacity of the reinforced test beams was significantly improved. Kantar et al. [16] completed the drop hammer impact test of ten CFRP reinforced beams, and the results show that the CFRP reinforcement method can prevent the beam from fracture and damage, and has stronger energy absorption performance. Pham and Shan et al. [17-19] studied the dynamic properties of different FRP types of constrained concrete. Compared with CFRP, glass fiber reinforced polymer (GFRP) and basalt fiber reinforced polymer (BFRP) have better impact resistance. In terms of numerical simulation, for the finite element simulation of RC beams reinforced by fiber composite materials, the main focus is on the bond-slip performance simulation of the interface between FRP and concrete, and the improvement of FRP reinforcement on the static and dynamic performance of the structure. Zhang et al. [20] proposed an interface constitutive model suitable for fatigue performance analysis of CFRP reinforced concrete beams. Huang et al. [21] conducted a refined numerical simulation of the static and dynamic performance of concrete beams reinforced with basalt fibers. Jin et al. [22] established a shear wall impact resistance model. The impact velocity has a great influence on the local damage degree, and increasing the edge members can reduce the damage degree. Daneshvar et al. [23] studied the drop hammer impact of RC slabs. Under low-velocity impact, the impact resistance has a great relationship with the amount of reinforcement. Jin et al. [24] conducted experimental research on GFRP bars reinforced RC slabs under different impact mass and speed, and obtained that GFRP bars have better energy dissipation capacity during impact. Under the impact load, the failure process of concrete is relatively complex, but researchers can predict the failure probability of concrete by using new technologies to ensure the safety of the structure [25-26].
Reviewer 3 Report
The authors presented an article titled: “Study on the impact resistance of FRP pasted to the blastproof partition wall under out-of-plane repeated impact load”. In this paper, the pendulum impact test was carried out for the first time on six blastproof partition walls pasted fiber reinforced polymer (FRP). Using the method of combining finite element simulation and experiment research, the influence of parameters such as FRP type, layer number and width, and pendulum impact times on the impact resistance of the wall was systematically studied. The article is very interesting, however, there are several points in the article that require further explanation.
Comment 1:
Abstract
Abstract can be improved. Present in the abstract novelty, practical significance of presented method.
Comment 2:
2. Experimental contents
Correct the title of this chapter: Experimental tests
Enter the introductory sentence before subsection 2.1.
Improve the quality of Figure 1 (difficult to read description of dimensions).
Improve the quality of Figure 3 (difficult to read description of machine parts).
Comment 3:
3. Analysis of pendulum impact test results
Enter the introductory sentence before subsection 3.1.
Improve the quality of Figure 7, 8, 9 (difficult to read description of the axis).
Comment 4:
4. Parametric analysis
Enter the introductory sentence before Figure 10. The chapter can not begin from the figure.
Comment 5:
5. Comparison between finite element simulation results and experiments
Enter the introductory sentence before subsection 5.1.
Improve the quality of Figure 14, 15 (difficult to read description of the axis, improve the clarity of the graphs).
Comment 6:
6. Conclusions
Add quantitative and qualitative work results. In addition, it is necessary to more clearly show the novelty of the article and the advantages of the proposed method. What is the difference from previous work in this area? Show practical relevance. Presented conclusions are only a description of the test results. Conclusions should reflect the purpose of the article.
Comment 7:
It will be useful to add a section of Nomenclature in which to sign all the physical quantities and abbreviations encountered in the article. There are many physical quantities in the text and such a section will help to find the description of the necessary element.
For example:
FRP : the fiber reinforced polymer
LRS-FRP : the Large-rupture-strain fiber reinforced polymer
CFRP : the Carbon fiber reinforced polymer
Comment 8:
The article must be proofread by a native English speaker. The literature is well chosen. The article can be interesting and helpful but authors must carefully study the comments and make improvements to the article step by step. Mark all changes in color. After minor changes the article can be considered for publication in the “Coatings” journal.
Author Response
Thanks very much for your comments. We have changed one by one according to your comments.
Author Response File: Author Response.pdf
Reviewer 4 Report
This paper provides the results of a study on the impact resistance of FRP pasted to the blast-proof partition wall under an out-of-plane repeated impact load. In this paper, the pendulum impact test was carried out for the first time on six blast-proof partition walls pasted with fiber-reinforced polymer (FRP). Using the method of combining finite element simulation and experiment research, the influence of parameters such as FRP type, layer number and width, and pendulum impact times on the impact resistance of the wall was systematically studied. Finally, the experimental basis and an economical and reliable protection method are provided for the study of improving the impact resistance of the blast-proof partition wall.
This study provides novel and important results. In addition, this paper is very well organized. Meanwhile, the authors should consider the following issues:
-There is a marked revised paper, including some required revisions and comments, which is attached below. These revisions and comments should be considered. The addition of the following research studies can help to enrich the References part:
1-"Effect of FRP retrofitting application on seismic behavior of a historical building at Nigde, Turkey", 14th European Conference on Earthquake Engineering, Ohrid, 2010.
2-"Analytical investigation of effect of retrofit application using CFRP on seismic behavior of a monumental building at historical Cappadocia region of Turkey" 9th US National and 10th Canadian Conference on Earthquake Engineering, Toronto, Canada, 2010.
Comments for author File: Comments.pdf
Author Response
Thanks very much for your comments. We have changed one by one according to your comments.
Point 1: There is a marked revised paper, including some required revisions and comments, which is attached below. These revisions and comments should be considered. The addition of the following research studies can help to enrich the References part:
Authors: Thanks very much for your comments.
Reply: We 've already cited the reference and checked the whole article.
Response 1:
Effect of FRP retrofitting application on seismic behavior of a historical building at Nigde, Turkey", 14th European Conference on Earthquake Engineering, Ohrid, 2010.
Round 2
Reviewer 1 Report
All comments made by the reviewer are properly addressed. The revised paper is suitable to be published in the Journal.
Author Response
Thank you very much for your comments.
