Soil Dynamic Constitutive Considering Post-Liquefaction Deformation and Reversible Pore-Water Pressure

Round 1

Reviewer 1 Report

This paper has an interesting subject, and sufficient scientifical basis, but needs several changes and improvements, as follows:

- Please check the journal's guidelines on the format of the list of references and how references are mentioned in the main text, so please make corrections in the whole text.  

- A careful check of grammar, syntax and the connection of phrases is necessary in the whole text (perhaps, please consider the choice of a native English speaker to check the document).

- All abbreviations should be fully explained with refs, when first met (e.g. SANISAND, PM4Sb etc, in the whole text). 

- Please give more details on the performed experiments, e.g. where and how they were performed, based on which standards, test materials and machinery,  etc.  

- The figures should be adequately referenced as Fig.1.a, not only "c", etc , in Section 2

- In Section 2.3 , please explain in detail how these equations 1-8 derive.  

-Please add details on the used software "Soilresp1D", references, how was made etc. 

- The conclusions should be reformatted to show the initiative of this work, in more practical way perhaps, how it can be used, its effects and its future extension possibilities.  

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

This paper studied the stress-strain variation, loading and unloading criterion, and primary function formula of saturated sand after liquefaction, according to the dynamic triaxial test of saturated sand, and proposed a systematic post-liquefaction deformation constitutive model. This paper also set up a time-domain analysis method for simulating the dynamic response of saturated sand before and after liquefaction, combined with the staggered grid method, the multi-transmitting boundary condition, and the effective stress constitutive model before liquefaction. It has reference value for time-domain post-liquefaction deformation constitutive for the liquefiable site seismic response analysis, and can be recommended to be published. However, there are some problems to be clarified in the content and expression of this article.

(1)     The description in this paper is complicated, the title, abstract and conclusion of the article need to be concise, and main body of the article must also be carefully polished.

(2)     In paragraph 1 of 2.3, “The effective stress constitutive model can simulate reversible pore-water pressure, combined with a 1D time-domain dynamic nonlinear constitutive model (LDSCM) based on the logarithmic dynamic skeleton. It shows as Eq. (1)(2), Eq. (1) is the effective stress model.” There should be a detailed description of the constitutive model here.

(3)     The formula in this paper is arranged in a disorderly way without good logic. For example, the first formula is put forward without source or basis. For example, formula 1 and 2 are too complicated with many parameters, so some major parameters in the formula should be described in detail.

(4)     The illustrations in the paper are lacking in sources, such as Figure 1-4, which neither talks about the test method nor the stress state and loading path targeted by the study. The experimental methods and results should be described

(5)     In paragraph 2.3.1. The basic function of stress-strain relationship after liquefaction, three loading and unloading stages AB-BCD-DA are proposed and the basic function of liquefaction shows in Eq. 3. However, this paragraph is rather disorganized and illogical. Three loading and unloading stages should be presented at the beginning of this paragraph.

(6)     The post-liquefaction deformation constitutive relation are shown in Eq.(9)-(10), the paper should describe the specific meaning of the constitutive parameters(a_1,n, b) and explain how the values of the constitutive parameters are related to the properties of the soil.

(7)     In last paragraph of 4, the sentence " Based on the dynamic response of the site, the amplitude of ground acceleration reaction before liquefaction obtained by the analysis method in this paper is significantly larger than that after liquefaction. The liquefaction of saturated sand has a noticeable damping effect on the dynamic response of the site, which is consistent with some in-situ observations." is not smooth. Please check all similar problems. The article is a little wordy, it is suggested to simplify.

Author Response

Please see the attachment.

Author Response File: Author Response.pdf

Round 2

Reviewer 1 Report

The authors have answered the comments of the reviewer, so this paper can be accepted for publishing