Seismic Damage Probability Assessment of Isolated Girder Bridges Based on Performance under Near-Field Earthquakes

Round 1

Reviewer 1 Report

Comments to the authors:

• Section of Introduction, the review of present work is insufficient, which in turn makes the research weak. Other literature on numerical models for the same purpose (or similar) can be added, addressing to the assumptions, main challenges and advancements. In the published literature, there are several approaches to assess the seismic vulnerability of bridges due to fragility curves, such as: judgmental or expert-based fragility curve, empirical fragility curves, analytical methods such as the elastic spectral method, nonlinear static analysis, nonlinear time history analysis, etc. The authors need to mention the several approaches to assess the seismic vulnerability of bridges in the Introduction. For example, you can take a look at this article: https://doi.org/10.1080/13632469.2018.1477637
• What is the advantage of using the copula technology method to obtain fragility curves?
• Section 2.4, the authors need to show the basic steps to obtain fragility curves with a flowchart.
• The authors need to show the cross-section of the columns in Section 3.1.
• The quality of the figures in the paper should be improved.

 

 

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

The paper "Seismic damage probability assessment of isolated girder bridges based on performance under near-field earthquakes" reports an interesting work about the use of the Copula technique to obtain the fragility curves for RC isolated continuous girder bridges, taking into account different earthquake damage indicators. After an introduction, the calculation method is described in Section 2 and Section 3 reports an application of the proposed method to a case study. In Section 4 the discussion of the results obtained is reported before the Conclusions indicated in Section 5. The paper is generally well organized in the Sections above mentioned but it has some aspects to improve before publication in Applied Science Journal:

• Introduction: in the sentence "All previous earthquake disaster statistics show that these bridges will cause serious damage to earthquake" (lines 30-31) consider as reported in 10.1016/j.engfailanal.2020.104727 - 10.1016/j.engfailanal.2019.104170 - 10.1016/j.soildyn.2019.105778 - 10.3390/INFRASTRUCTURES5060052
• lines 121 - 122 review the sentence
• Eq. 7 the subscript 21 is incorrect
• Eq. 13 replace the symbol * with ⋅
• line 186 correct the subscript i according to the previous Eqs.
• Section 3 describe in more detail the Case Study 
• lines 244 - 245 add an appropriate reference which explains in detail the behaviour of the contact unit Gap unit used in this work
• Table 1 correct all the u.m. (MPa - N/m³ - kN/m - kN)
• improve de quality of the Figures 4 - 5 - 6 - 7 - 8 
• Section 5: in the conclusions better highlight the novelty of the research
• improve the English of the manuscript 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

I believe the manuscript has been significantly improved and it is ready for publication in Applied Sciences Journal.