Transportation Geotechnics最新文献

{"title":"Estimation of unsaturated small-strain shear modulus in a laboratory test box and field site from a soil-water characteristic curve","authors":"Lucas Acheampong,&nbsp;L. Sebastian Bryson","doi":"10.1016/j.trgeo.2025.101599","DOIUrl":"10.1016/j.trgeo.2025.101599","url":null,"abstract":"<div><div>The small-strain shear modulus plays a significant role in analyzing soil-structure interactions and the stiffness properties of earth materials under static and dynamic loading conditions. Traditionally, this parameter is determined through seismic wave measurements in the laboratory and in the field. Alternatively, it can be determined in the field by performing dynamic cone penetrometer tests and subsequently converting to California Bearing Ratio (CBR) values using empirical equations, and finally to modulus using another empirical equation. However, this multistep process is both labor-intensive and prone to compounded errors stemming from the use of numerous empirical relationships. In this study, an approach was introduced for estimating the small-strain shear modulus for preliminary analysis based on the soil–water characteristic curve (SWCC) and a saturated small-strain shear modulus. The proposed model, developed using laboratory small-strain shear modulus data, was tested on soils compacted within a laboratory test box. In addition, a correlation was derived from the test box to modify the proposed model to make it applicable to field soils. The modified model was applied to a field site to predict measured small-strain shear modulus, which was determined from shear wave velocity and SWCC fitting parameters derived from textural characteristics and electrical resistivity. The predicted data showed satisfactory agreement with the measured data at the field site. Overall, the study demonstrates the effectiveness of the proposed model in predicting small-strain shear modulus for both small laboratory specimens and field data.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101599"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Limit support pressure of shield excavation face under-crossing the existing metro station","authors":"Shaokun Ma ,&nbsp;Jinmei Li ,&nbsp;Zhuofeng Li ,&nbsp;Zhibo Duan ,&nbsp;Bin Shi","doi":"10.1016/j.trgeo.2025.101584","DOIUrl":"10.1016/j.trgeo.2025.101584","url":null,"abstract":"<div><div>With the progression of urban development, the occurrence of shield tunnels intersecting existing transportation hubs has become increasingly prevalent. When a tunnel is constructed beneath an existing station, the stress distribution within the surrounding soil is altered, leading to variations in the support pressure at the excavation face of the shield tunnel. However, the current literature lacks a calculation method for determining the support pressure at the excavation face in such scenarios. This research utilizes three-dimensional finite element numerical simulations to examine the soil responses associated with a shield tunnel that under-crossing an existing metro station situated within a typical clay-gravel stratum. The study specifically addresses the failure of the excavation face at varying distances from the existing station. The analysis encompasses the support pressure at the excavation face, soil displacement and stress, as well as the three-dimensional failure model. Based on the findings from the numerical simulations, a modified formula for calculating overburden earth pressure is proposed, which incorporates the influence of the overlying station. Following this modification, the relative error in the calculation of overburden earth pressure is reduced from 67.4% to 3.9%. Furthermore, when the modified formula is applied to assess the overburden earth pressure within a three-dimensional wedge-prism model of the clay-gravel strata, the relative error in the calculation of limit support pressure is decreased from 8.7% to 0.5%. The proposed modified formula for overburden earth pressure serves as a significant reference for determining the limit support pressure of the excavation face when a tunnel under-crossing the existing station.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101584"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144154891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel method to estimate the stiffness of compacted granular geomaterials","authors":"Samuel Valencia-Díaz ,&nbsp;Jacob D.R. Bordón ,&nbsp;J. Yepes ,&nbsp;Juan J. Aznárez ,&nbsp;Miguel A. Franesqui","doi":"10.1016/j.trgeo.2025.101581","DOIUrl":"10.1016/j.trgeo.2025.101581","url":null,"abstract":"<div><div>Transport infrastructure involves the use of large volumes of compacted geomaterials, leading to significant economic and environmental impacts that need to be addressed in all stages of the project. A new laboratory procedure to estimate the stiffness of embankments, subgrades, granular bases and subbases is proposed. The utilization of well-established and simple equipment results in an easy-to-conduct and cost-effective method that combines the compaction procedure of a Modified Proctor test with the loading scheme of a repetitive static plate load test, adapted to the reduced geometry of this new ‘miniature plate load test’ (mPLT). This enables the estimation of the compaction characteristics and the vertical strain modulus in a single test. Subsequently, the elastic modulus needed for analytical design is derived through back-calculation using a numerical model. Soil specimens were tested using different gradations, compaction energies and moisture contents to generate various regression surfaces that correlate the variables of interest. Furthermore, the laboratory strain modulus obtained from this test was compared with full-scale static plate load tests conducted in the field. The results show that this methodology could become a valuable reference test to aid in the design and quality control of compacted fills for civil infrastructures.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101581"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wave finite element method for computing the dynamic response of periodic structures with transition zones and subjected to moving loads: Application to railways tracks with damaged or reinforced zones","authors":"B. Claudet ,&nbsp;D. Duhamel ,&nbsp;G. Foret ,&nbsp;T. Hoang ,&nbsp;F. Sabatier","doi":"10.1016/j.trgeo.2025.101572","DOIUrl":"10.1016/j.trgeo.2025.101572","url":null,"abstract":"<div><div>The dynamics of transition zones linking two semi-infinite periodic structures is the subject of numerous researches, particularly in the railway track domain. For periodic structures, the Wave Finite Element (WFE) method is a numerical method helping the computation of the dynamics of these structures by reducing the consideration of the spatial domain to a few periods consisting of domains whose properties differ from those of the two right and left semi-infinite periodic structures. The WFE method firstly consists in reducing the degrees of freedom (DoFs) of one spatial period (substructure) to those of the borders of this substructure. Then, using the Floquet’s theorem, these DoFs are computed by the mean of a wave analysis. This article presents new developments in the Wave Finite Element (WFE) method to compute the mechanical response of transition zones linking two semi-infinite periodic structures, with the aim of making complex computations affordable and of reducing the computation time. The WFE method is applied on each periodic structure to write the response of the boundaries of the central zone in terms of left-going and right-going waves. Some amplitudes of these waves can be directly computed from the external load. To get the unknown wave amplitudes, the wave equations are combined with the dynamic equilibrium equation of the central zone. Thus, this method reduces the computation of the dynamics of a structure containing a transition zone linking two semi-infinite periodic zones to a wave problem at the boundaries of the transition zone coupled to a FEM modelling of the transition zone. In this paper, writing the problem only in terms of wave amplitude allows a much better conditioning of the linear system giving the solution to the problem compared to classical methods combining wave amplitudes and usual degrees of freedom at the mesh nodes. Special developments are made to account for moving loads on the whole infinite structure. The case of moving loads is particularly considered because of its applications to railways. For simple geometries, numerical studies show a strong agreement between results obtained with this method and other experimental and analytical results. More complex examples are given for railways tracks with damaged or reinforced zones. The calculation of stresses and damage criteria in components of the track for healthy, damaged and repaired railway tracks shows the interest in repair.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101572"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An insight into the stability of unsaturated embankments with different suction profiles","authors":"Leonardo Maria Lalicata ,&nbsp;Gorizia D’Alessio ,&nbsp;Francesca Casini","doi":"10.1016/j.trgeo.2025.101582","DOIUrl":"10.1016/j.trgeo.2025.101582","url":null,"abstract":"<div><div>As-compacted soil embankments are partially saturated and, during their lifetime, they experience changes in water content and suction according to interaction with the atmosphere and the groundwater table. However, conventional slope stability assessments often assume either dry or fully saturated conditions, which can lead to inaccurate predictions. This paper presents an analytical framework for the analysis of the stability of unsaturated embankments under different suction profiles. The limit equilibrium analysis is extended to unsaturated slopes by incorporating matric suction, degree of saturation, and rainfall infiltration. A novel design chart is introduced to illustrate the interplay between the hydromechanical parameters of the slope, its geometry, the position of the groundwater table, and the infiltration profile. The outcomes demonstrate the significance of suction and saturation distributions in the sustainable planning and safety evaluation of embankments, offering meaningful perspectives for enhancing design methodologies and prevent failures in unsaturated engineered slopes. A key finding is the identification of the transition infiltration depth, which delineates the shift from deep to shallow slip surfaces. If the wetting front remains above this threshold, the design chart remains applicable. However, if it extends beyond this depth, a more comprehensive stability analysis is required. The method has been successfully used to predict the safety factor of engineered slopes under different suction profiles. Serving also as a benchmark for more advanced stability analyses, the design chart provides engineers with a practical tool for integrating unsaturated soil behaviour into geotechnical design, enhancing risk assessment and failure prevention strategies.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101582"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Particle Geometry Space: An integrated characterization of particle shape, surface area, volume, specific surface, and size distribution","authors":"Priya Tripathi,&nbsp;Seung Jae Lee","doi":"10.1016/j.trgeo.2025.101579","DOIUrl":"10.1016/j.trgeo.2025.101579","url":null,"abstract":"<div><div>Particle <em>size</em> and <em>shape</em> are the two key 3D particle geometry parameters that govern the complex behavior of granular materials. The effect of particle size and shape has often been examined in isolation, typically through separate analyses of particle size distribution (PSD) and shape distribution, leading to an unaddressed knowledge gap. Beyond size and shape, 3D particle geometry also includes attributes such as <em>surface area</em> and <em>volume</em>, which together defines the <em>surface-area-to-volume ratio</em>, commonly known as the <em>specific surface</em>. To comprehensively understand the influence of particle geometry on the behavior of granular materials, it is important to integrate these parameters, ideally into a single analytical framework. To this end, this paper presents a new approach, <em>particle geometry space</em> (<em>PGS</em>), formulated based on the principle that the key 3D particle geometry attributes – <em>volume</em>, <em>surface area</em>, and <em>shape</em> – can be uniformly expressed as a function of <em>specific surface</em>. The PGS not only encompasses all 3D particle geometry attributes but also extends its scope by integrating the conventional PSD concept. This innovation enables engineers and researchers who are already familiar with PSD to perform a more systematic characterization of 3D particle geometries. The paper (i) discusses the limitations of existing methods for characterizing 3D particle geometry, (ii) offers an overview of the PGS, (iii) proposes a method for integrating PSD into the PGS, and (iv) demonstrates its application with a set of 3D mineral particle geometry data.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101579"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143948225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An evolutionary optimized automated machine learning approach to soil unconfined compressive strength prediction for sustainable transportation infrastructure","authors":"Leonardo Goliatt ,&nbsp;Haydar Abdulameer Marhoon ,&nbsp;Zaher Mundher Yaseen ,&nbsp;Salim Heddam ,&nbsp;Ahmed W. Al Zand ,&nbsp;Bijay Halder ,&nbsp;Mou Leong Tan ,&nbsp;Zulfaqar Sa’adi ,&nbsp;Iman Ahmadianfar ,&nbsp;Salah Elsayed","doi":"10.1016/j.trgeo.2025.101550","DOIUrl":"10.1016/j.trgeo.2025.101550","url":null,"abstract":"<div><div>Soil chemical stabilization recommendations use treated soils’ unconfined compressive strength (UCS) as the main acceptance criterion in laboratory tests. However, optimizing UCS supplemental content requires a human- and financial-intensive trial-and-error process. Data intelligence models enhance automatized scientific sampling procedures, limit laboratory testing, and provide useful information regarding stabilization adequacy without producing preliminary samples. This research proposes an evolutionary algorithm-assisted automated gradient boosting model to predict the UCS values from datasets from diverse sources. A grey wolf optimization algorithm is integrated into the gradient boosting training procedure, determining its best internal parameters and helping to select the most relevant input variables. Comparative evaluations on six recently published datasets demonstrate the efficiency of the proposed model compared to existing approaches. The optimized models produced better results than the benchmark models reported in the literature, with average coefficients of determination ranging from 0.723 to 0.928. The hybrid models with evolutionary feature selection achieved comparable performance while reducing the number of input variables between 16% and 54%.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101550"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seismic resilience assessment of highway embankments: considering damage measure of hysteretic energy dissipation","authors":"Junyao Tang ,&nbsp;Siyu Chen ,&nbsp;Lingkun Chen ,&nbsp;Binshuang Zheng ,&nbsp;Yang Zhang ,&nbsp;Tao Ma ,&nbsp;Xiaoming Huang","doi":"10.1016/j.trgeo.2025.101510","DOIUrl":"10.1016/j.trgeo.2025.101510","url":null,"abstract":"<div><div>The wide spatial distribution of highway transportation infrastructure increases its exposure to earthquakes during its service life, thereby raising the risk of damage, particularly for structures with high vulnerability. Therefore, the concept of seismic resilience has attracted extensive attention from academia and the engineering community in recent years. Previous researches on the seismic performance of embankments focused on fragility analysis, and permanent ground displacement (<em>PGD</em>) from field investigations was adopted as a damage measure (<em>DM</em>). However, it cannot explicitly reflect the dynamic response and damage mechanism during earthquakes, and whether it can precisely reflect the damage state (<em>DS</em>) also requires further research. In addition, some preliminary frameworks have been established for the seismic resilience of embankments, but there are no quantitative assessment methods and results. In view of this, a complete framework including hazard analysis, fragility analysis and resilience assessment is proposed to evaluate the seismic resilience of a high-filled embankment. To effectively reflect the damage mechanism of the structure, the <em>DM</em> of hysteretic energy dissipation and corresponding classification criteria of different <em>DS</em>s are established. The dynamic response and damage mechanism of embankments are analyzed through finite element nonlinear dynamic analysis, and the fragility analysis is carried out based on the <em>DM</em> of hysteretic energy dissipation. Ultimately, the resilience of embankments at different seismic scenarios is evaluated by combining the restoration functions under different <em>DS</em>s, and the effects of embankment height and embankment slope gradient are analyzed to effectively guide the seismic design. The results show that at the peak ground acceleration (<em>PGA</em>) of 0.4 g, the resilience of the embankment shows a significant decrease due to the lower robustness and rapidity, and the resilience index decreases to 0.79. The resilience index shows a nonlinear decreasing trend with the increase of embankment height, and the corresponding resilience indexes of the embankments with the heights of 10 m, 15 m, and 20 m are 0.85, 0.83, 0.79 at the <em>PGA</em> of 0.4 g. As the slope gradient is reduced, the resilience of the embankment has a significant enhancement only when the <em>PGA</em> is greater than 0.2 g, and the resilience indexes under the slope gradients of 1:1.75, 1:2, and 1:2.25 are 0.79, 0.82, and 0.83 at the <em>PGA</em> of 0.4 g. The resilience enhancement realized by the slope grading has a significant marginal effect. The framework is an extension of the traditional seismic performance analysis to optimize the pre-disaster seismic design and post-disaster restoration process, which is important to ensure the normal operation of the highway system and reduce the socio-economic costs.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101510"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143922821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of transition section treatments between bridge and regular track using DEM coupled simulation","authors":"Cheng Chen ,&nbsp;Cheng-lu Zhang ,&nbsp;Pei Tai ,&nbsp;Lei Zhang ,&nbsp;Rui Rui","doi":"10.1016/j.trgeo.2025.101588","DOIUrl":"10.1016/j.trgeo.2025.101588","url":null,"abstract":"<div><div>This study investigates the impact of four treatment measures—wedge-shape backfill, asphalt mat, concrete slab approach, and stone column installation—on the dynamic performance of railway transition zones, using a coupled Discrete Element Method and Multibody Dynamics model. A 24 m long full-scale three-dimensional model of the transition section, including the discrete ballast particles and discontinuous subgrade elements, was developed to simulate uneven settlement under cyclic M-wave train loads and evaluate the effectiveness of the treatments. The results reveal that all treatments significantly reduced the uneven settlement of the track, with wedge-shape backfill and stone column treatments showing the most promising results, reducing uneven settlement by 42.2 % and 41.1 %, respectively. These treatments also improved the load-bearing capacity of the ballast layer by increasing particle contacts and reducing particle movement. The stone column method notably suppressed particle movement in the ballast layer by distributing the applied load more effectively. In contrast, the asphalt mat and concrete slab methods showed moderate improvements. This study highlights the importance of enhancing subgrade stiffness in transition zones to mitigate settlement.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101588"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144116025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing grout injection: A computational and experimental study","authors":"Seyedeh Azadeh Mousavi Darzikolaei ,&nbsp;Zacharia M. Sao ,&nbsp;Jubair Ahmad Musazay ,&nbsp;Shihui Shen ,&nbsp;Farshad Rajabipour ,&nbsp;Xiaofeng Liu","doi":"10.1016/j.trgeo.2025.101576","DOIUrl":"10.1016/j.trgeo.2025.101576","url":null,"abstract":"<div><div>Grouting is a critical engineering technique used to repair and reinforce infrastructure, with its effectiveness largely dependent on the grout’s fluidity and injectability. This study investigates grout injection for railroad ballast reinforcement through a comprehensive approach combining computational modeling and laboratory experiments to optimize grout mixture rheology and injection strategies. The computational model simulates grout flow through aggregates using particle-resolving method for small-scale cases and a porosity-based model for large-scale applications. Parameters for the porosity model were calibrated by upscaling the small-scale results via numerical Darcy experiments. The non-Newtonian behavior of grout is represented by the Herschel–Bulkley model. Rheological parameters for the optimal grout mixture were identified through model simulations, experimental comparisons, and fluidity requirements. Laboratory experiments helped narrow down candidate rheological parameters which were further evaluated using the computational model. Additionally, the model guided the design of the injection pipe layout, spacing, and perforation hole locations. This integrated study provides an optimized grout mixture and injection configuration, offering practical recommendations for railroad ballast reinforcement applications.</div></div>","PeriodicalId":56013,"journal":{"name":"Transportation Geotechnics","volume":"52 ","pages":"Article 101576"},"PeriodicalIF":4.9,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}