Soil Dynamics and Earthquake Engineering最新文献_第6页

Cyclic behavior and liquefaction resistance of sand with partial bagasse replacement

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-29 DOI: 10.1016/j.soildyn.2025.109237

Jithin P. Zachariah, Ravi S. Jakka

{"title":"Cyclic behavior and liquefaction resistance of sand with partial bagasse replacement","authors":"Jithin P. Zachariah, Ravi S. Jakka","doi":"10.1016/j.soildyn.2025.109237","DOIUrl":"10.1016/j.soildyn.2025.109237","url":null,"abstract":"<div><div>Replacing soil with waste materials offers significant opportunities for advancing geoenvironmental practices in the construction of large-scale geostructures. The present study investigates the viability of utilizing sugarcane bagasse, a massively produced agricultural waste material, as a partial replacement for soil and its potential to control soil liquefaction. Utilization of bagasse in large geostructures not only aids in the management of a significant volume of bagasse but also facilitates the conservation of natural soil resources. Experimental investigations were conducted through a series of isotropically consolidated, stress-controlled, undrained cyclic triaxial tests. Various volumetric proportions of bagasse to sand, extending up to 50:50 (bagasse: sand), were examined to evaluate the performance of the mix under different cyclic loading conditions. The study evaluates the cyclic strength, stiffness degradation, cycle retaining index, etc., for different bagasse sand mixes across the expected cyclic stresses corresponding to Indian seismic zones 3, 4, and 5. Variation of these properties with relative density has also been studied. Results indicate that the bagasse can effectively be utilized as a geomaterial to partially replace the soil in large proportions ranging from 19 % to 41 % without compromising the initial cyclic strength of the natural soil. Notably, at an optimal content of 30 %, the bagasse sand mix exhibits higher resistance to the accumulation of excess pore water pressure, maximizing its liquefaction resistance. Furthermore, the utilization of bagasse as a partial replacement for soil increased the cyclic degradation index within the suggested range of bagasse content.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"191 ","pages":"Article 109237"},"PeriodicalIF":4.2,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095292","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}

引用次数: 0

Structural damages during the February 06, 2023 Kahramanmaraş Earthquakes in Turkey

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-29 DOI: 10.1016/j.soildyn.2025.109214

Tuba Gurbuz , Abdullah Cengiz

{"title":"Structural damages during the February 06, 2023 Kahramanmaraş Earthquakes in Turkey","authors":"Tuba Gurbuz , Abdullah Cengiz","doi":"10.1016/j.soildyn.2025.109214","DOIUrl":"10.1016/j.soildyn.2025.109214","url":null,"abstract":"<div><div>On February 6, 2023, two very destructive earthquakes by 9 h apart, Mw 7.8 Pazarcık and Mw 7.7 Elbistan (Kahramanmaraş Earthquakes), struck southeastern Turkey, causing more than 50 thousand loss of lives, 40 thousand collapsed and more than half a million damaged buildings. Our research team conducted a site investigation at the earthquake-hit area and this paper presents common structural damages observed at site. Seismological characteristics of the earthquakes was presented and spectral accelerations formed by using strong ground motion records were shared with design spectrums by Turkish Seismic Design Code 2018 (TSDC2018). In certain locations, response acceleration spectra of the ground motion exceeded elastic design spectrum values in the current TSDC2018 (sometimes exceeded maximum earthquake level DD1). Some new buildings designed in accordance with TSDC2018 were hit by a greater seismic load and heavily damaged/collapsed during Kahramanmaraş Earthquakes. However, most of new structures, which were designed and constructed to ensure high ductility and owing to their existing reserve capacities, were able to survive the earthquakes and prevented loss of lives even though, many of them were heavily damaged. Nonlinear time history analysis was conducted to determine seismic performance of six storey buildings, which were designed by TSDC2018 considering both design (DD2) and maximum (DD1) earthquake levels, with return periods of 475 and 2475 years. A construction cost comparison was also conducted for RC buildings, which were designed by two (DD2, DD1) earthquake levels, respectively. As a result of the conclusions made throughout the study, the current seismic design procedure for regular RC buildings located in high risk seismic regions should be reevaluated to enhance their seismic resilience.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"191 ","pages":"Article 109214"},"PeriodicalIF":4.2,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095290","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}

引用次数: 0

Systematic seismic simulation for nuclear island buildings in CPCRF site: Insights into interfacial discontinuity

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-28 DOI: 10.1016/j.soildyn.2025.109221

Jianbo Li , Zhewen Hu

{"title":"Systematic seismic simulation for nuclear island buildings in CPCRF site: Insights into interfacial discontinuity","authors":"Jianbo Li , Zhewen Hu","doi":"10.1016/j.soildyn.2025.109221","DOIUrl":"10.1016/j.soildyn.2025.109221","url":null,"abstract":"<div><div>Nuclear facility sites built on soft deposits often adopt a combined piled cushion raft foundation (CPCRF) to enhance bearing capacity. However, separation and slip at the raft–bottom interface is inevitable in refined seismic simulations of weakly anchored nuclear island buildings (NIBs). Multiple factors related to both the structure and foundation influence the interface behavior. To address this, a structure–interface–soil nonlinear interaction model was developed, incorporating interfacial discontinuity characteristics, tri-directional wave inputs, and a stable semi-unbounded condition. The validity of the wave–field simulation method and the interface model were confirmed through theoretical comparisons. Using the AP1000 NIB at a specific CPCRF site as an example, the practicability of the model was validated, and key behavioral patterns were identified. In the static-seismic process, correlations between interface behavior, pile damage, and structural vibration were quantitatively elucidated. When seismic intensity exceeded design limits, the minimum instantaneous grounding ratio decreased rapidly. Structural vertical acceleration nearly doubled, and the frequency band of peak horizontal vibration shifted to higher frequencies. Interface behavior strongly correlated with slip stability and pile body damage. These findings indicate that interfacial discontinuities at the raft's bottom pose safety risks warranting further investigation.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"191 ","pages":"Article 109221"},"PeriodicalIF":4.2,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094845","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}

引用次数: 0

Mechanical properties and safety analysis of rack railways under seismic loads with different connection methods

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-28 DOI: 10.1016/j.soildyn.2025.109272

Lang Wang , Zhaowei Chen , Jiangshen Chen

{"title":"Mechanical properties and safety analysis of rack railways under seismic loads with different connection methods","authors":"Lang Wang , Zhaowei Chen , Jiangshen Chen","doi":"10.1016/j.soildyn.2025.109272","DOIUrl":"10.1016/j.soildyn.2025.109272","url":null,"abstract":"<div><div>Rack railways are essential for mountainous railway transportation because of their ability to navigate steep slopes. However, in the tectonically active southwestern mountainous region of China, which is characterized by extensive fault zones, the behavior of rack systems on bridges under seismic loads has not been thoroughly studied. Here, this gap is addressed by developing a dynamic model of the vehicle–track–bridge system under seismic loading via train–track–bridge interaction theory. The mechanical properties of rack systems with both rigid and elastic connection methods are examined in this study, with a focus on key parameters such as rack tensile stress, shear stress, lateral torque, and bolt shear stress under varying dynamic loads. Rigid connections exhibit greater stiffness, leading to stress concentrations under coupled seismic and vehicle loads. This stiffness results in stress concentrations near bridge bearings, in which the maximum tensile stress, shear stress, and lateral torque reach 242 MPa, 226 MPa, and 2380 N m, respectively. Moreover, the maximum bolt shear stress reached 222 MPa, surpassing the shear and bending strength thresholds, further indicating a risk of localized structural failure. Conversely, elastic connections, with their buffering effects, effectively reduce stress concentrations. The maximum tensile stress, shear stress, lateral torque, and bolt shear stress were reduced to 68 MPa, 147 MPa, 1630 N m, and 120 MPa, respectively, which are all within safety limits. These findings demonstrate that elastic connections enhance the stability and safety of rack railway systems on bridges under seismic conditions. The aim of this study is to provide a theoretical basis for the design and safety assessment of rack railways on bridges in mountainous regions.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"191 ","pages":"Article 109272"},"PeriodicalIF":4.2,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095291","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}

引用次数: 0

A method for determining the probability of seabed liquefaction considering stratigraphic structure and variations in soil dynamic characteristics

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-27 DOI: 10.1016/j.soildyn.2025.109248

Zhenglong Zhou, Zhengyang Zhang, Ziyi Ye, Guanlan Xu, Yan Zhang, Guoxing Chen, Jiawei Jiang

{"title":"A method for determining the probability of seabed liquefaction considering stratigraphic structure and variations in soil dynamic characteristics","authors":"Zhenglong Zhou, Zhengyang Zhang, Ziyi Ye, Guanlan Xu, Yan Zhang, Guoxing Chen, Jiawei Jiang","doi":"10.1016/j.soildyn.2025.109248","DOIUrl":"10.1016/j.soildyn.2025.109248","url":null,"abstract":"<div><div>Existing research on soil liquefaction probability discrimination usually only considers the inherent variability of soil parameters, neglecting the impact of stratigraphic variability. To address this, the study couples an embedded Markov chain model with a conditional random field model to simulate the spatial variability of both stratigraphy and soil parameters simultaneously. The Yangtze River Delta region in China, due to its unique geographical location, is highly sensitive to secondary disasters such as soil liquefaction triggered by earthquakes. This study uses measured borehole data from the coastal area of the Yangtze River estuary in the region, employing the embedded Markov chain model to simulate stratigraphic structural variability and the conditional random field model to simulate soil dynamic parameters. The simulation results are used to assess the liquefaction probability of seabed sites under seismic conditions, providing a scientific basis for the site selection and safety evaluation of marine engineering projects. The research indicates that considering the spatial variability of both stratigraphy and soil parameters is crucial for accurately assessing liquefaction potential.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"191 ","pages":"Article 109248"},"PeriodicalIF":4.2,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143094846","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}

引用次数: 0

Dynamic impact performance of cemented tailings backfill in a water-bearing environment: Coupling effects and damage characteristics

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-27 DOI: 10.1016/j.soildyn.2025.109249

Zhiyi Liu , Deqing Gan , Haikuan Sun , Zhenlin Xue , Youzhi Zhang

{"title":"Dynamic impact performance of cemented tailings backfill in a water-bearing environment: Coupling effects and damage characteristics","authors":"Zhiyi Liu , Deqing Gan , Haikuan Sun , Zhenlin Xue , Youzhi Zhang","doi":"10.1016/j.soildyn.2025.109249","DOIUrl":"10.1016/j.soildyn.2025.109249","url":null,"abstract":"<div><div>Cemented tailings backfill (CTB) is a way to make full use of tailings, but its dynamic mechanical and damage characteristics under water bearing environment are still not clear. In this paper, CTB was completely immersed with different immersion time (5 d, 10 d, 20 d, 30 d) under different initial immersion age (3 d, 7 d, 14 d, 28 d). The dynamic compression test under different impact velocity (3.0 m s<sup>−1</sup>, 4.5 m s<sup>−1</sup>, 6.0 m s<sup>−1</sup>, 7.5 m s<sup>−1</sup>) was carried out by using split Hopkinson pressure bar. The mechanical properties and damage evolution law of CTB were analyzed by low field nuclear magnetic resonance and SEM. Results show that the post-peak stage characteristics of the stress-strain curve of water-immersed CTB under impact load is divided into four types, which are type I “strain rebound”, type II “stress drop”, type III “post-peak plasticity”, and type IV “post-peak ductility”. Water immersion effect mainly increases the peak damage degree of CTB and the proportion of the damage before the peak strain to the total damage. Under impact load, water immersion effect reduces the bearing capacity of the gel matrix of CTB and promotes the dislocation of tailings and the expansion of the original crack surface. However, the free water in the pores do not have enough time to flow to the tip of the original crack, which hinders the crack growth. Based on Weibull distribution and Kelvin model, the dynamic aging damage model of water-immersed CTB is constructed, which provides a theoretical basis for analyzing the failure mechanism of CTB under water immersion. Besides, it is suggested that reducing the immersion time of CTB in water is the key factor to improve the stability of CTB.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"191 ","pages":"Article 109249"},"PeriodicalIF":4.2,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095295","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}

引用次数: 0

Study on anti-dislocation design parameters of tunnel structure with flexible joints crossing fault based on simplified analytical method

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-27 DOI: 10.1016/j.soildyn.2025.109243

Mingyu Chang , Yusheng Shen , Haokang Wang , Xiaohai Pan , X. Zhang , Cheng Di , Y. Luo

{"title":"Study on anti-dislocation design parameters of tunnel structure with flexible joints crossing fault based on simplified analytical method","authors":"Mingyu Chang , Yusheng Shen , Haokang Wang , Xiaohai Pan , X. Zhang , Cheng Di , Y. Luo","doi":"10.1016/j.soildyn.2025.109243","DOIUrl":"10.1016/j.soildyn.2025.109243","url":null,"abstract":"<div><div>The tunnel structure is susceptible to shear failure due to fault dislocation action, particularly in regions with high seismic activity. To mitigate this risk, the use of tunnel segmental lining and flexible joints has been identified as an effective anti-dislocation strategy. However, the design of these components lacks available analytical solutions. To address this gap, a simplified longitudinal beam-spring tunnel model has been developed to assess the longitudinal response of tunnel structures, incorporating the splaying and staggering deformations at flexible joints. The virtual node method is employed to efficiently solve the problem of discontinuous deformation at these joints.</div><div>An analytical solution for the longitudinal response of tunnels with flexible joints subjected to fault dislocation is derived utilizing the established governing equations, continuity conditions at the flexible joints and boundary conditions. The validity of the proposed solution is confirmed through comparisons with results from model tests and numerical simulations. Subsequently, a sensitivity analysis is conducted to explore the effects of segmental lining length, flexible joint parameters, and fault zone width. The findings reveal that flexible joints significantly enhance the anti-dislocation capability of tunnel structures, reducing the longitudinal strain of tunnel linings by 57.68 %. Furthermore, the anti-dislocation performance can be further improved by decreasing the stiffness of the flexible joints. Notably, the flexible joints located at the interface between the fault zone and the moving or fixed block endure the most shear and rotational deformations. Additionally, a negative correlation is observed between the required width of flexible joints and the length of segmental lining.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"191 ","pages":"Article 109243"},"PeriodicalIF":4.2,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095297","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}

引用次数: 0

Vertical dynamic response of a floating pipe pile considering the soil plug effect

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-27 DOI: 10.1016/j.soildyn.2025.109247

Rui Zhao , Denghui Dai , Ning Zhang , Guangfan Wu , Mao Ye , Fanming Shen , Haijun Lu

引用次数: 0

Seismic response and failure mechanism of caisson: A centrifuge shake-table investigation

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-27 DOI: 10.1016/j.soildyn.2025.109263

Linlu Zhou , Zifei Han , Lei Su , Hua-Ping Wan , Xianzhang Ling

{"title":"Seismic response and failure mechanism of caisson: A centrifuge shake-table investigation","authors":"Linlu Zhou , Zifei Han , Lei Su , Hua-Ping Wan , Xianzhang Ling","doi":"10.1016/j.soildyn.2025.109263","DOIUrl":"10.1016/j.soildyn.2025.109263","url":null,"abstract":"<div><div>Past seismic events have shown that caisson quay walls are susceptible to severe damage during earthquakes, underscoring the importance of assessing their seismic behavior. However, very limited studies have been conducted on the soil-structure-water interaction of the caisson-ground system during earthquakes. This study will investigate the seismic response and failure mechanism of a caisson through a centrifuge shake-table test. Specifically, the seismic response results of the backfill, the caisson, and the subsoil are discussed; an acceleration integration method for identifying permanent displacement to estimate the backfill deformation is proposed; and a phase analysis of the seismic response of the caisson-ground system is conducted. It is found that the liquefaction of the backfill results in a substantial increase in the dynamic earth pressure behind the caisson. The failure mode of the caisson is lateral movement accompanied by slight tilting and continuous rocking vibrations. The proposed acceleration integration method can effectively estimate the deformation and lateral spreading of backfill. Phase analysis results reveal the relationship between the failure of the caisson-ground system and seismic action.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"191 ","pages":"Article 109263"},"PeriodicalIF":4.2,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095298","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}

引用次数: 0

Research on the dynamic behavior of transversely isotropic saturated media due to meeting subway loads using an improved 2.5D FE-BE method

IF 4.2 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-01-25 DOI: 10.1016/j.soildyn.2025.109244

Junyan Huang , Xinjiang Wei , Zhi Ding , Weiying Xu

{"title":"Research on the dynamic behavior of transversely isotropic saturated media due to meeting subway loads using an improved 2.5D FE-BE method","authors":"Junyan Huang , Xinjiang Wei , Zhi Ding , Weiying Xu","doi":"10.1016/j.soildyn.2025.109244","DOIUrl":"10.1016/j.soildyn.2025.109244","url":null,"abstract":"<div><div>The focus of this contribution is to develop an improved 2.5-dimensional (2.5D) FE (finite element)-BE (boundary element) method for a tunnel structure-transversely isotropic saturated soil system subject to underground moving train loads. In the proposed model, the rectangular tunnel invert, the lining, and the region of interest within the soil continuum use the 2.5D FE method. The remaining region of half space is replaced with a viscous spring boundary along the lateral sides and boundary element along the bottom. The theory of acoustic propagation in saturated media is extended to include transversely isotropy, viscoelasticity and boundary elements. An existing case is calculated using the enhanced model, and the results are compared with the previous literature to validate the accuracy and reliability of the proposed method. A parametric analysis is further conducted, and the factors considered in the analysis of ground-borne vibrations induced by trains meeting in the rectangular tunnel include the soil permeability, the groundwater level, and the depth of the tunnel. Numerical comparisons show that the saturated soil above the tunnel moderates the displacement undulation caused by quasistatic axle loads of the train, but this is not the case if the load has a non-zero excitation frequency. Moving train loads with excitation produce larger excess pore water pressure amplitude than do the quasi-static loads over a wide range along the travelling direction. The effect of meeting trains depends on the running speeds of both lines in opposite directions to some extent. Other conclusions useful to practical engineers are contained in the parametric study.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"191 ","pages":"Article 109244"},"PeriodicalIF":4.2,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143095296","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}

引用次数: 0