Study on Optimal Design of Grotto-Eave System with Cable Inerter Viscous Damper for Vibration Control
Round 1
Reviewer 1 Report
The paper has been expanded and rewritten in Sections 3 and 4 compared to the previous version. In addition, the title of the manuscript and some equations were clarified. The references have been expanded to include relevant scientific literature. In summary, all the comments I made in the review have been considered. As it stands, the paper has my recommendation for publication in the journal buildings.
Author Response
Dear Reviewer,
Please see the attachment
Author Response File: 
Author Response.pdf
Reviewer 2 Report
This study investigates the optimal design of cable inerter viscous damper for vibration control of historic buildings. The paper contains useful information that may attract the interests of certain researchers. The following issues should be considered before the publication of this paper.
- The motivation of this paper is not clear from the abstract and the introduction. Why do the authors use the cable inerter viscous damper? What is the advantage of the cable inerter viscous damper compared to existing inerter-based dampers?
- In the abstract, the full name of CIVD should be provided.
- Since the paper considers historic buildings, it is suggested to discuss briefly if the building is able to withstand the force provided by the damper.
- Some punctuations are used, e.g., in the subtitles of Fig. 15.
- Proofreading is suggested.
Author Response
Dear Reviewer,
Please see the attachment
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
Comments to the previous version are properly addressed.
This manuscript is a resubmission of an earlier submission. The following is a list of the peer review reports and author responses from that submission.
Round 1
Reviewer 1 Report
It was necessary to compare some responses of this system with some systems already in use, by several parameters. And then say what this system gives better and what worse than them.
Reviewer 2 Report
In this paper, a cable inerter viscous damper (CIVD) system, which is composed of eaves, connection, and grotto, was proposed for seismic response mitigation. The authors developed a mechanical model for the historical grotto-eave system, which is a great cultural value of the national heritage. The eaves of the grottoes are made of wooden or steel structure. To protect the grottoes, wooden structures are built in ancient times, while steel structures are the modern structural solution. The eaves are lapped on the grotto or inserted into it, so the two parts are connected to a complete system. The material, type, and position of the connection will influence its stiffness. There is a large difference in stiffness between the eaves and the grottoes. When subjected to external excitation, the incongruity of deformation will occur between the eaves and the grotto body. So, the authors were analysed efficient vibration control system, such as the CIVD, which has the flexible arrangement and the small size damper.
The cable inerter viscous damper (CIVD) can enlarge the original apparent mass and damping through rotation. The system can not only realize structural reinforcement and improve the integrity of the structure, but also realize the lightweight of the shock absorber. For the grotto-eave system, the shock absorber cannot be installed directly in the grotto, so the CIVD can be installed inside the wooden eaves.
In the paper, the authors carried out parameter analysis to obtain the minimum additional damping ratio of CIVD under different vibration mitigation ratios. Finally, the dynamic time history analysis of the grotto-eave system installed with CIVD under the action of earthquake is carried out taking into account four ground motions record: EL Centro, Taft, Chi-chi, and Kobe. After a comprehensive analysis, the authors came to the conclusion that the damping element in CIVD has a larger deformation and better energy dissipation capacity compared to the traditional damper.
The research in this paper can provide a reference for the design of an efficient and lightweight vibration mitigation scheme of historical buildings based on an inerter damping system.
The paper deals with an important issue related to the vibration control of the historical grotto-eave system which can be extended to other objects. What is very positive, the authors themselves present the limitations of the proposed analysis which focuses only on macro structural design parameters, which are theoretical in nature. At present, the cable inerter viscous damping device is in the development stage and it will certainly be a continuation of the authors' research in the future.
On assessing the paper very positively, I have a few minor comments.
- The paper briefly deals with current world research on vibration control of historic buildings.
- References could be more extensive.
- For better readability of the contents of the figures, all figures should contain a small description of the variables.
- in the text, two tables have the same number
Reviewer 3 Report
Please find the attached pdf file
Comments for author File: Comments.pdf
