Soil Dynamics and Earthquake Engineering最新文献

{"title":"Seismic performance and damage characteristics of pile network composite-reinforced high-speed railway subgrade","authors":"Mao Yue ,&nbsp;Changwei Yang ,&nbsp;Jie Fan ,&nbsp;Jia Luo ,&nbsp;Jing Lian ,&nbsp;Shiguang Zhou ,&nbsp;Xuanming Ding","doi":"10.1016/j.soildyn.2025.109340","DOIUrl":"10.1016/j.soildyn.2025.109340","url":null,"abstract":"<div><div>A series of large-scale shaking table tests was conducted on a pile network composite-reinforced high-speed railway subgrade. The displacement, peak acceleration amplification factor, dynamic soil pressure, and geogrid strain data were used to investigate the dynamic characteristics. The Hilbert–Huang transform spectrum, marginal spectrum, and damping ratios were used to study the seismic energy dissipation characteristics and damage evolution mechanisms of the reinforced subgrade. The results indicate that the graded loading of seismic waves induces a global settlement phenomenon within the subgrade, the displacement phenomenon of the slope is more evident, and the reinforcement effectively mitigates the amplification effect of the peak acceleration along the elevation. The peak and cumulative residual dynamic soil pressures were most significant near the bedding layer, and the upper and middle parts of the subgrade exhibited superior stabilization performance. The geogrid reduced the local vibration variability and enhanced the overall stability. The damage evolution in the middle part of the subgrade was relatively gentle, whereas the slope exhibited a multistage development trend. The internal damage of the subgrade grows slowly at 0.1–0.2 g, faster at 0.2–0.6 g, and rapidly at 0.6–1.0 g.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109340"},"PeriodicalIF":4.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143611659","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":"Experimental study on liquefaction behavior of desaturated calcareous sand under various stress conditions using air injection technique","authors":"Saeed Sarajpoor ,&nbsp;Yumin Chen ,&nbsp;Zijun Wang ,&nbsp;Runze Chen ,&nbsp;Ke Ma","doi":"10.1016/j.soildyn.2025.109363","DOIUrl":"10.1016/j.soildyn.2025.109363","url":null,"abstract":"<div><div>Employing soil improvement techniques to mitigate and prevent the detrimental effects of liquefaction on foundations often leads to a significant increase in construction costs in engineering projects. Developing simple, cost-effective, and eco-friendly liquefaction mitigation methods has always been one of the main concerns of geotechnical engineers. Researchers introduced the induced partial saturation (IPS) method to increase the liquefaction resistance of the saturated foundations, which is based on decreasing the saturation degree of the saturated sand. In this study, hollow cylinder torsional shear tests were conducted on loose saturated and desaturated calcareous sand to assess the liquefaction behavior of desaturated sand. Soil compressibility is the primary parameter affecting the liquefaction behavior of desaturated sand. As saturation degree, back pressure, and effective confining pressure significantly influence soil compressibility, their effects on the liquefaction resistance of desaturated sand were investigated. The pore pressure development during cyclic loading reveal that, unlike saturated samples, desaturated samples do not exhibit an excess pore pressure ratio reaching one, even when the double amplitude shear strain surpasses 7.5 %. Finally, the test results demonstrated a notable correlation between liquefaction resistance ratio, maximum volumetric strain, and the maximum generated excess pore pressure ratio, and a pore pressure model was proposed.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109363"},"PeriodicalIF":4.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593996","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":"Study on the influence of unsymmetrical surcharge on adjacent pile foundations in a coastal soft soil area","authors":"Zhiwei Chen ,&nbsp;Huiyuan Deng ,&nbsp;Guoliang Dai ,&nbsp;Mingxing Zhu ,&nbsp;Weiming Gong ,&nbsp;M.R. Azadi","doi":"10.1016/j.soildyn.2025.109365","DOIUrl":"10.1016/j.soildyn.2025.109365","url":null,"abstract":"<div><div>This study investigates the influence of unsymmetrical surcharge on the piles of a bridge located in a coastal soft soil area, aiming to elucidate the deformation characteristics of the piles. The impact of some key parameters, including soft soil properties and unsymmetrical surcharge, on pile deformations is evaluated through 3D finite element numerical analysis and parameter sensitivity analysis. The results show that unsymmetrical surcharge significantly influences the displacement of both the piles and the surrounding soil, with both being affected by the soil arching effect. The parameter sensitivity analysis reveals that Poisson's ratio of the soft soil, and the stiffness of the piles have minimal impact on horizontal displacement. In contrast, the elastic modulus, cohesion, and internal friction angle of the soft soil, as well as the height and slope of the unsymmetrical surcharge, have significant effects on the piles. When the unsymmetrical surcharge is applied parallel or perpendicular to the bridge, the parallel surcharge has a relatively minor impact on the pile. The horizontal displacement of the pile follows an exponential relationship with <em>L</em>/<em>B</em>, <em>D</em>/<em>h</em>, and <em>B</em>/<em>d</em>. A functional relationship can be established between these parameters to predict the pile's horizontal displacement.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109365"},"PeriodicalIF":4.2,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593995","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":"Experimental study on dynamic characteristics of saponified slag fly ash foamed lightweight soil","authors":"Sixun Wen ,&nbsp;Haibin Wei ,&nbsp;Zipeng Ma ,&nbsp;Yangpeng Zhang","doi":"10.1016/j.soildyn.2025.109362","DOIUrl":"10.1016/j.soildyn.2025.109362","url":null,"abstract":"<div><div>As an emerging environmentally friendly solid waste-based composite foam lightweight soil, saponified slag fly ash (SS-FA) foam lightweight soil has a wide range of application prospects in road engineering. In this paper, the dynamic characteristics of SS-FA foam light soil material were investigated. Dynamic triaxial tests under different cyclic loading conditions were designed to analyze the variation rules of dynamic elastic modulus and damping ratio. The results showed that the stress-strain curve of SS-FA foam lightweight soil can be divided into three stages: elastic stage, plateau stage, and stress yielding stage. Under cyclic dynamic load, with the increase of dynamic stress amplitude, the dynamic elastic modulus of 400–700 kg/m3 samples gradually increased to the maximum, reaching 235.24 MPa, 324.54 MPa, 356.45 MPa, 379.67 MPa, respectively. The damping ratio, on the other hand, shows a tendency to first decrease and then slowly increase to stabilize. The dynamic elastic modulus is positively correlated with density grade, confining pressure and loading frequency. The damping ratio decreases with the increase of density grade and loading frequency, and increases with the increase of confining pressure. The electron microscope test was designed and image processing and data statistics were carried out. Through the grey correlation analysis, the correlation degree between the microstructure parameters of SS-FA foamed lightweight soil and the macroscopic mechanical properties is basically above 0.6, indicating that the two have a significant correlation. A normalized prediction formula model between the dynamic elastic modulus of materials and the conditional parameters was established. The R² of the linear fitting of the predicted value is 0.964, indicating that the prediction model has a high degree of fitting and a good prediction effect. The research results revealed the dynamic mechanical properties of foamed lightweight soil, and provided a reference for the application of SS-FA foamed lightweight soil in subgrade engineering.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109362"},"PeriodicalIF":4.2,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577164","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":"Three-component composite columns periodically buried in elastic half space as metasurfaces for broadband surface-wave attenuation","authors":"Xiao Wang ,&nbsp;Shui Wan ,&nbsp;Yuze Nian ,&nbsp;Linyun Zhou ,&nbsp;Qilin Zhao","doi":"10.1016/j.soildyn.2025.109354","DOIUrl":"10.1016/j.soildyn.2025.109354","url":null,"abstract":"<div><div>Elastic metamaterials/metasurfaces have enabled many applications for vibration reduction in civil engineering in the past decade. This paper investigates the feasibility of harnessing novel three-component composite columns for surface-wave attenuation. The composite columns are periodically buried near the surface of an elastic half space to form a metasurface. Eigenvalue studies are conducted based on both the <span><math><mrow><mi>ω</mi><mrow><mo>(</mo><mi>k</mi><mo>)</mo></mrow></mrow></math></span> and <span><math><mrow><mi>k</mi><mrow><mo>(</mo><mi>ω</mi><mo>)</mo></mrow></mrow></math></span> methods, and broadband surface-wave bandgaps (SWBGs) are found in real and complex band structures. For the metasurface composed of concrete-rubber-steel composite columns, a broadband SWBG covering 36.5–96.9 Hz can be achieved with a small periodic constant of 0.3 m. The formation of the broadband SWBG is attributed to the local resonance mechanism, whose lower bound frequency is determined by the resonance of the core and upper bound frequency is mainly determined by the torsional resonance of the soft coating layer. Using complex band structures and frequency-domain simulations, the lack of correlation between the minimum imaginary parts of wave numbers and vibration reduction performance is well explained. In addition, it is found that the evanescent surface eigenmodes in the SWBG can be excited and observed in numerical simulations, indicating the complex band structure analysis is effective for understanding how surface waves decay in SWBGs. A comprehensive parametric study is performed to investigate the influence of geometric parameters, material parameters, and damping in material on the attenuation performance of the metasurface. The feasibility of applying the metasurface to mitigate train-induced ambient vibration is investigated via time-domain numerical simulations.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109354"},"PeriodicalIF":4.2,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577162","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":"Fast calculation method for soil dynamics under harmonic loads by 2.5D FEM and RBM combination technique","authors":"Sen Wang ,&nbsp;Tao Xin ,&nbsp;Xianggang Du ,&nbsp;Yang Xu ,&nbsp;Wei Lu","doi":"10.1016/j.soildyn.2025.109347","DOIUrl":"10.1016/j.soildyn.2025.109347","url":null,"abstract":"<div><div>A comprehensive analysis of soil dynamics is essential for accurately predicting the environmental impacts of subway operations. However, traditional finite element methods become computationally expensive when dealing with high-frequency disturbances and large-scale effects. To overcome the challenge, this study proposes a hybrid approach that integrates 2.5D FEM with the reduced basis method (RBM) to enhance computational efficiency. First, the solution of vibration transfer functions of the soil system is derived based on 2.5D FEM, and its accuracy is validated against two benchmark examples. Subsequently, RBM is introduced to establish reduced-order models in both the frequency and wavenumber domains. In this case study, the proposed method demonstrates higher accuracy than the linear interpolation method, significantly reducing truncation errors. Specifically, the statistical error of the linear interpolation method is found to be 3 to 35 times greater than that of the proposed approach. Moreover, the proposed method achieves an approximately 75 % reduction in computational effort by avoiding inefficient repeat calculations when new parameters are introduced in traditional FEM approaches. However, it is important to note that the effectiveness of the proposed method depends significantly on the number of pre-computed solutions used to construct the reduced basis space. Computational efficiency improves as the sampling interval decreases. Thus, the proposed method is recommended when there are a sufficient number of pre-computed solutions, in addition to the linear interpolation method. Moreover, its application in reproducing the high-frequency subway-induced ground vibrations shows that the proposed method has a good effect. In conclusion, this study provides a novel computational method with high accuracy and efficiency, which has a significant potential for application in more complex soil dynamic problems in transportation and earthquake engineering.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109347"},"PeriodicalIF":4.2,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577163","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":"A system identification technique for the estimation of the bulk modulus based on pore water pressure dissipation records","authors":"Vicente Mercado ,&nbsp;Norberto Ayala ,&nbsp;Jose Duque","doi":"10.1016/j.soildyn.2025.109345","DOIUrl":"10.1016/j.soildyn.2025.109345","url":null,"abstract":"<div><div>This article introduces a novel system identification technique for determining the bulk modulus of cohesionless soils in the post-liquefaction dissipation stage following seismic excitation. The proposed method employs a discretization of Biot's theory for porous media using the finite difference method. The technique was validated using synthetic data from finite elements simulations of an excited soil deposit. These numerical simulations were performed using an advanced multi-yield surface elastoplastic model. Additionally, the technique was used to analyze a series of high-quality dynamic centrifuge tests performed on Ottawa F-65 sand as part of the LEAP-2020 project. A comparative analysis between recorded and identified bulk modulus values highlights the effectiveness of the proposed technique across a wide range of conditions.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109345"},"PeriodicalIF":4.2,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563679","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":"Analytical approach to influencing mechanism of cement-soil reinforcement on horizontal dynamic response of single piles","authors":"Yufan Xiang ,&nbsp;Hongbo Liu ,&nbsp;Guoliang Dai,&nbsp;Zhiyuan Ji","doi":"10.1016/j.soildyn.2025.109337","DOIUrl":"10.1016/j.soildyn.2025.109337","url":null,"abstract":"<div><div>This study centers on the horizontal dynamic response of cement-soil composite (CSC) piles, which are of vital importance for stabilizing offshore structures like bridges and wind turbines against the dynamic loads of wind, waves, and rotational forces from wind turbine blades. Despite their practical significance, theoretical research on the horizontal dynamics of CSC piles trails behind their engineering applications. A sophisticated mathematical model has been developed to delineate the coupled vibration behavior of CSC piles and the adjacent soil under horizontal dynamic loads. Through meticulous theoretical derivation, the analytical expressions for the dynamic impedance at pile head related to horizontal, rocking, and horizontal-rocking motions were acquired. Subsequently, elaborate numerical computations and parametric analyses were executed to explore the influence of cement-soil parameters on these dynamic impedance. The results demonstrate that augmenting the cement-soil radius elevates the dynamic impedance at pile head in all three kinds, yet exerts a negative influence on the horizontal dynamic impedance under high-frequency vibrations. The research also determines an optimum depth for cement-soil reinforcement (about 0.4 times the length of the concrete pile), beyond which the advantages recede. Furthermore, it is manifested that increasing the cement-soil elastic modulus prominently enhances the dynamic impedance, which is propitious to enhancing the horizontal vibration resistance of CSC piles. This conclusion significantly contributes to a profound comprehension of CSC pile behavior and provides highly valuable guidance for their design and application in offshore engineering.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109337"},"PeriodicalIF":4.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548251","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":"Hysteresis model of metal rubber bridge bearings","authors":"Xiushen Xia ,&nbsp;Yaobin Huang ,&nbsp;Dawei Li ,&nbsp;Feng Xu","doi":"10.1016/j.soildyn.2025.109351","DOIUrl":"10.1016/j.soildyn.2025.109351","url":null,"abstract":"<div><div>Metal rubber bridge bearings have good durability and hold promising prospects for small and medium -span highway bridges. The seismic design of medium and small span bridges with metal rubber bearings involves the hysteretic model of bearings and the calculations of post-yield stiffness, initial stiffness and yield force. In this study, the formula for calculating the post-yield stiffness of metal rubber bridge bearings with circular section was derived based on the overlap area method. In the formula, the post-yield stiffness is directly proportional to the compressive stress and the diameter of the bearing, and inversely proportional to the height of the bearing. Considering the initial stress state of the bearing, the differential equation was established, and the theoretical formula for calculating the initial stiffness of the metal rubber bearing was derived. Based on the experimental results, the simplified formulas for calculating the initial stiffness and post-yield stiffness have been proposed for practical applications. Based on the shear yield displacement of the metal rubber bearings obtained from the test, the yield strain of the bearings was obtained, and the formula for calculating the yield force using this yield strain was presented. The relationship between the initial stiffness and the post-yield stiffness of metal rubber bridge bearings was investigated. The initial stiffness of metal rubber bearings can be expressed as the post-yield stiffness. The experimental hysteresis curve was compared with the bilinear hysteresis curve obtained from the formula. The hysteresis curves calculated by the formulas are in good agreement with the test hysteresis curves. The bilinear hysteresis model and its key parameter calculation formula can be effectively employed for seismic response analysis of metal rubber bearing bridges.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109351"},"PeriodicalIF":4.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563778","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":"Deep learning-based stochastic ground motion modeling using generative adversarial and convolutional neural networks","authors":"Mohsen Masoudifar ,&nbsp;Mojtaba Mahsuli ,&nbsp;Ertugrul Taciroglu","doi":"10.1016/j.soildyn.2025.109306","DOIUrl":"10.1016/j.soildyn.2025.109306","url":null,"abstract":"&lt;div&gt;&lt;div&gt;This paper proposes a probabilistic framework for generating three-dimensional (3D) synthetic ground motions using deep learning techniques—specifically, generative adversarial networks (GAN) and convolutional neural networks (CNN). Deep learning methods have been shown to surpass classical model classes in performance when provided with large datasets, and the ever-increasing number of ground motion records provides an opportunity to design generative models to produce artificial ground motions that outperform classical models. In addition, these methods can directly extract features and patterns from ground motion data without loss of generality, enabling prediction and generation of synthetic ground motions. The proposed framework consists of two distinct deep learning modules. The first generates normalized 3D synthetic ground motions given source and site characteristics. For this purpose, a conditional Wasserstein GAN comprising a generator and a critic in an adversarial setup is designed in which they engage in a simultaneous competitive process. Through learning from the dataset of real ground motions, the generator attempts to generate artificial ground motions that are more convincing to the critic, whereas the critic seeks to improve its ability to identify the realness or artificialness of the motions and provide the generator with feedback. The second module produces peak ground accelerations (PGA) for the three spatial components of the generated normalized ground motion, given the normalized motion and the said characteristics. For this purpose, a CNN is designed with “inception” layers, each of which concurrently applies multiple convolution filters of varying sizes to the input and concatenates their outputs, enabling the network to efficiently capture features at various scales. The learning performance of both modules is improved by realistic data augmentation techniques that increase training data size and are specifically designed for 3D ground motion records, including random rotations and cropping. The proposed framework is trained and validated using the dataset of over 200,000 records of the KiK-net database. The site and source characteristics utilized in the application of the study comprise the moment magnitude, distance, fault mechanism, and shear wave velocity. The signal generation module is validated through a novel procedure based on the diversity of the generated signals and its comparison with that of the real ground motions, which here demonstrates the absence of overfit and mode collapse. The amplitude prediction module is validated using classical metrics, such as the correlation coefficient between real and predicted PGAs, which, at 0.97 for the test data, demonstrates a satisfactory prediction quality and absence of overfit. Finally, the framework as a whole is validated in time and frequency domains both qualitatively by comparing time-moving averages, pseudo-spectral ordinates, and Fourier ampli","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"194 ","pages":"Article 109306"},"PeriodicalIF":4.2,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548250","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}