Acta Geotechnica最新文献_第6页

Sensitivity analysis on critical combinations of input parameters in DEM granular flow analysis DEM颗粒流分析中输入参数关键组合的敏感性分析

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-20 DOI: 10.1007/s11440-024-02499-2

Junsen Xiao, Kenta Tozato, Reika Nomura, Yu Otake, Kenjiro Terada, Shuji Moriguchi

{"title":"Sensitivity analysis on critical combinations of input parameters in DEM granular flow analysis","authors":"Junsen Xiao, Kenta Tozato, Reika Nomura, Yu Otake, Kenjiro Terada, Shuji Moriguchi","doi":"10.1007/s11440-024-02499-2","DOIUrl":"10.1007/s11440-024-02499-2","url":null,"abstract":"<div><p>Granular flow is a typical process that occurs in sediment disasters, including rockfalls, avalanches and landslides, etc. The runout distance in granular flow is closely associated with the ultimate impact range of these sediment disasters. However, this factor is often highly sensitive to various physical parameters and exhibits significant randomness. Hence the study of granular flow is crucial to elucidating the mechanism of such disasters and even to disaster prevention and mitigation. In recent years, a numerical simulation called discrete element method (DEM) that simulates at the particle level has been widely used in this field. Based on the above situation, this study aimed to capture the critical DEM input parameter combinations for risk assessment in a four-dimensional parameter space considering the particle size distribution. XGBoost feature importance is employed to decide the search priority, and its results indicate that the friction angle with bottom surface (FABS) and coefficient of restitution (COR) are the key parameters. The two key parameter spaces were then comprehensively explored using Gaussian process regression response surfaces. The correlation between the FABS and runout distance appeared as a convex function. The COR exhibited diverse degrees of approximately linear correlation with the runout distance throughout the granular flow. The particle size distribution indirectly led to inconsistencies between the bidisperse flow and other granular flows in the influence mechanisms of the key parameters. By clarifying this effect, we efficiently identified two critical parameter combinations for granular flow DEM simulation.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 1","pages":"387 - 412"},"PeriodicalIF":5.6,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-024-02499-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142963145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shear strength evolution of densely compacted Gaomiaozi bentonite along confined wetting path 密实高庙子膨润土沿受限润湿路径的抗剪强度演化

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-19 DOI: 10.1007/s11440-024-02505-7

Xin-Xin Dong, Yong-Gui Chen, Wei-Min Ye, Qiong Wang

{"title":"Shear strength evolution of densely compacted Gaomiaozi bentonite along confined wetting path","authors":"Xin-Xin Dong, Yong-Gui Chen, Wei-Min Ye, Qiong Wang","doi":"10.1007/s11440-024-02505-7","DOIUrl":"10.1007/s11440-024-02505-7","url":null,"abstract":"<div><p>The shear strength of compacted bentonite is crucial for preventing tilting and damage of the waste canisters in deep geological repositories (DGRs). The shear strength evolution along the confined wetting path also needs to be investigated, given the long saturation time of the bentonite buffer. This study conducted direct shear tests on densely compacted Gaomiaozi bentonite after suction control under confined conditions to determine its peak shear strength and strength parameters. Furthermore, the shear strength evolution along the confined wetting path was modeled on the basis of the effective stress principle. The results show that, for a given dry density, the peak shear strength at a given vertical pressure and the strength parameters exhibit an overall decrease along the confined wetting path. Moreover, the peak shear strength of the specimen that underwent confined wetting was considerably lower than that of the as-compacted specimen with the same total suction, indicating that the suction value and microstructure codetermine the peak shear strength of compacted Gaomiaozi bentonite. For this reason, the peak shear strength in the as-compacted state and the dual-porosity water retention curves established along the confined wetting path were used to model the shear strength evolution along the confined wetting path. The substitution equation for the effective stress parameter <i>χ</i> was selected on the basis of the experimental evidence. Finally, the model parameters were calibrated from the shear strength evolution at a given vertical pressure, and they reasonably reproduced the shear strength evolution under other vertical pressures. These findings can be helpful for the design and safe operation of DGRs under extreme geological conditions.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2293 - 2305"},"PeriodicalIF":5.6,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Novel insights into the dilatancy and non-coaxiality of sand under generalised constant-η loading 在广义常η加载下，对砂土的剪胀性和非同轴性有了新的认识

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-18 DOI: 10.1007/s11440-024-02465-y

P. K. Triantafyllos, V. N. Georgiannou, I.-O. Georgopoulos

{"title":"Novel insights into the dilatancy and non-coaxiality of sand under generalised constant-η loading","authors":"P. K. Triantafyllos, V. N. Georgiannou, I.-O. Georgopoulos","doi":"10.1007/s11440-024-02465-y","DOIUrl":"10.1007/s11440-024-02465-y","url":null,"abstract":"<div><p>The present study investigates the behaviour of sand under generalised compression loading. A stress path architecture is devised featuring the repetition of loading and unloading at constant η = q/p′ for a sequence of increasing α<sub>σ′1</sub> and <i>b</i> = sin<sup>2</sup>α<sub>σ′1</sub>; where α<sub>σ′1</sub> is the principal direction of stress, and <i>b</i> = <span>(frac{{left( {sigma{prime} 2 - sigma{prime} 3} right)}}{{left( {sigma{prime} 1 - sigma{prime} 3} right)}})</span> is the intermediate principal stress ratio. Irrecoverable volumetric and shear strains develop under compression with the former being considerably lower than the latter, exhibiting weaker variations with η and α<sub>σ′1</sub>. It is shown that the compression of pre-loaded sand at the same η but different α<sub>σ′1</sub> induces non-coaxiality uncorrelated to excessive plastic contraction. The volumetric and shear strains increase when one of the planes of maximum stress obliquity aligns with the horizontal bedding plane. Furthermore, the compressibility, dε<sub>vol</sub>/dp′, oscillates with the increase in α<sub>σ′1</sub> at constant η. The dilatancy, D = dε<sub>vol</sub>/dε<sub>q</sub>, varies from very large values to zero depending on the stress path and stress history. It is also shown that the variable dε<sub>q</sub>/dp′ normalises effectively both the non-coaxiality angle, ξ = α<sub>dε1</sub>-α<sub>σ′1</sub>, and the dilatancy, D. Specifically, a unique curve describes the relationship between ξ and dε<sub>q</sub>/dp′ for a given α<sub>σ′1</sub> irrespective of η, p′, and ψ (state parameter). On the other hand, a unique curve describes the relationship between D and dε<sub>q</sub>/dp′ irrespective of the value of the variables η, α<sub>σ′1</sub>, b, p′, and ψ, and of the pre-shearing and pre-loading. This inverse proportion relationship indicates the decoupling of the incremental volumetric strains from the incremental shear strains in the compression mode.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 3","pages":"1103 - 1139"},"PeriodicalIF":5.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Investigations on mechanical responses of frozen soil–rock mixture under cyclic loading: experiments and binary-medium-based multiscale constitutive model 循环荷载作用下冻土-岩石混合体力学响应研究：试验与二元介质多尺度本构模型

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-18 DOI: 10.1007/s11440-024-02480-z

Dan Wang, Enlong Liu, Qihao Yu, Chengsong Yang, Yunming Yang, Bingtang Song, Jian Kang, Ling Chen, Haotian Wei, Qiong Li

{"title":"Investigations on mechanical responses of frozen soil–rock mixture under cyclic loading: experiments and binary-medium-based multiscale constitutive model","authors":"Dan Wang, Enlong Liu, Qihao Yu, Chengsong Yang, Yunming Yang, Bingtang Song, Jian Kang, Ling Chen, Haotian Wei, Qiong Li","doi":"10.1007/s11440-024-02480-z","DOIUrl":"10.1007/s11440-024-02480-z","url":null,"abstract":"<div><p>In cold regions, the frozen soil–rock mixture (FSRM) is subjected to cyclic loading coupled with freeze–thaw cycles due to seismic loading and ambient temperature changes. In this study, in order to investigate the dynamic mechanical response of FSRM, a series of cyclic cryo-triaxial tests were performed at a temperature of −10 °C on FRSM with different coarse-grained contents under different loading conditions after freeze–thaw cycles. The experimental results show that the coarse-grained contents and freeze–thaw cycles have a significant influence on the deformation properties of FSRM under cyclic loading. Correspondingly, a novel binary-medium-based multiscale constitutive model is firstly proposed to describe the dynamic elastoplastic deformation of FSRM based on the coupling theoretical framework of breakage mechanics for geomaterials and homogenization theory. Considering the multiscale heterogeneities, ice-cementation differences, and the breakage process of FSRM under external loading, the relationship between the microscale compositions, the mesoscale deformation mechanism (including cementation breakage and frictional sliding), and the macroscopic mechanical response of the frozen soil is first established by two steps of homogenization on the proposed model. Meanwhile, a mixed hardening rule that combines the isotropic hardening rule and kinematic hardening is employed to properly evaluate the cyclic plastic behavior of FSRM. Finally, comparisons between the predicted results and experimental results show that the proposed multiscale model can simultaneously capture the main feature of stress–strain (nonlinearity, hysteresis, and plastic strain accumulation) and volumetric strain (contraction and dilatancy) of the studied material under cyclic loading.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 1","pages":"231 - 263"},"PeriodicalIF":5.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142963107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Cosserat model incorporating anisotropy evolution and its application in numerical analysis of strain localization in clay 考虑各向异性演化的Cosserat模型及其在粘土应变局部化数值分析中的应用

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-16 DOI: 10.1007/s11440-024-02483-w

Wencheng Wei, Hongxiang Tang, Yang Liu, Haolong Chen

{"title":"Cosserat model incorporating anisotropy evolution and its application in numerical analysis of strain localization in clay","authors":"Wencheng Wei, Hongxiang Tang, Yang Liu, Haolong Chen","doi":"10.1007/s11440-024-02483-w","DOIUrl":"10.1007/s11440-024-02483-w","url":null,"abstract":"<div><p>This paper deeply couples the exponential-type nonlinear strain softening with the anisotropic method of microstructure tensor combined stress invariants, proposing an effective strength formula that reflects the anisotropy evolution of soil. Furthermore, an expression for the anisotropy ratio <i>k</i> of strength as an equivalent plastic strain-related variable is derived. For natural clay, this evolution of strength anisotropy is incorporated into the Mohr–Coulomb-matched Drucker–Prager (MC-matched DP) yield criterion within the Cosserat continuum framework, resulting in a more refined soil constitutive model. The main strength parameters required for this model can be conveniently obtained based on conventional soil tests, and the model functionality can be degraded through parameter adjustments. The detailed procedure of stress updating algorithm and the elastoplastic tangent modulus matrix are provided for the constitutive integration. Through the finite element implementation, the superiority of the model is demonstrated compared with existing literature. Also, a biaxial compression example is systematically analyzed to prove that the model can effectively reflect the sensitivity of soil to loading direction. Moreover, the evolution of the shear band morphology, particle rotation in the shear band, and the anisotropy degree presented by the model are consistent with previous experimental studies and discrete element method (DEM)-related literature results. Furthermore, the proposed model effectively addresses numerical convergence issues and mesh size dependence usually encountered in classical models during the simulation of strain localization occurred in the soil.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 1","pages":"365 - 385"},"PeriodicalIF":5.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142963102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Sand and dust storms control for sustainable anti-desertification: large-scale EICP-PVAc treatment field demonstration and insights 沙尘控制与可持续防沙治沙：大型EICP-PVAc治理现场示范与见解

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-16 DOI: 10.1007/s11440-024-02494-7

Hengxing Wang, Xiaohao Sun, Linchang Miao, Jizhou Zhang, Wenhua Yin, Linyu Wu

{"title":"Sand and dust storms control for sustainable anti-desertification: large-scale EICP-PVAc treatment field demonstration and insights","authors":"Hengxing Wang, Xiaohao Sun, Linchang Miao, Jizhou Zhang, Wenhua Yin, Linyu Wu","doi":"10.1007/s11440-024-02494-7","DOIUrl":"10.1007/s11440-024-02494-7","url":null,"abstract":"<div><p>Sand and dust storms (SDS) have gained global recognition as severe natural disasters and are emerging as a significant public health concern. However, the current methods for SDS control have imitations in wide applications, necessitating the urgent need for effective alternatives. This study investigated the feasibility of integrating enzymatically induced carbonate precipitation-polyvinyl acetate (EICP-PVAc) treatment with traditional engineering devices (<i>e.g.,</i> straw checkerboard barriers and sand control belts) to mitigate SDS through a large-scale field experiment. Four different treated zones were established and three different treatment states [spraying on a day without rainfall (SWR), spraying after rainfall, and spraying before rainfall ] were designed to compare treatment effects. Soil characteristics including pH, organic carbon, and NH<sub>3</sub>–N contents were measured in the treated areas, and environmental implications of the EICP-PVAc treatment were discussed. Results show that the EICP-PVAc treatment effectively ensured long-term wind-erosion resistance of field areas, irrespective of different zones and treatment states, thereby addressing the limitation of traditional methods in stabilizing shifting sands. Upon comparison, SWR treatments exhibited superior efficacy in controlling field SDS. Furthermore, the EICP-PVAc treatment increased organic carbon and NH<sub>3</sub>–N contents in the treated areas. In addition, by combining EICP-PVAc treatment with vegetation protection measures, challenges such as low plant survival rate and the generation of contaminant by-products can be effectively mitigated, showcasing promising application potential. The study contributes to the potential application of EICP-PVAc treatment for SDS control to achieve long-term sustainability in anti-desertification and ecosystem function restoration.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2201 - 2219"},"PeriodicalIF":5.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-024-02494-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Final steady state of sloping capillary barriers under constant intensity rain: development and numerical validation of a simplified method of analysis 恒强雨作用下倾斜毛细屏障的最终稳态：一种简化分析方法的发展与数值验证

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-16 DOI: 10.1007/s11440-024-02492-9

Simon J. Wheeler, Paverean Mudcharoen, Riccardo Scarfone

{"title":"Final steady state of sloping capillary barriers under constant intensity rain: development and numerical validation of a simplified method of analysis","authors":"Simon J. Wheeler, Paverean Mudcharoen, Riccardo Scarfone","doi":"10.1007/s11440-024-02492-9","DOIUrl":"10.1007/s11440-024-02492-9","url":null,"abstract":"<div><p>A new simplified method of analysis is proposed for predicting the final steady state behaviour of sloping capillary barriers subjected to continuous rain of constant intensity. In contrast to an existing simplified method, the proposed new method assumes approximate final steady state suction profiles on vertical cross-sections of the finer layer that are appropriate for sloping capillary barriers, with flow parallel to the slope in the lower part of the finer layer. Numerical validation, performed by hydraulic FE modelling, shows that, in all cases studied, the final steady state profiles of suction, degree of saturation and horizontal seepage velocity predicted by the new simplified method are excellent matches to the corresponding results from FE simulations. As a consequence, values of water storage capacity and water transfer capacity are accurately predicted in all cases, together with the final steady state variation of water stored with horizontal coordinate. A parametric study shows the influence of key variables (slope angle, material of finer layer, thickness of finer layer and rainfall intensity) on water storage capacity and water transfer capacity of sloping capillary barriers.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 1","pages":"1 - 21"},"PeriodicalIF":5.6,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142963103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

The response of caisson induced by adjacent spudcan penetration in nonhomogeneous clay 非均质黏土中相邻钻穿沉箱的响应

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-16 DOI: 10.1007/s11440-024-02473-y

Xi Peng, Yongle Qi, Mi Zhou, Xihong Zhang, Yinghui Tian

引用次数: 0

Mechanical and deformation behavior of layered hydrate-bearing clayey-silty sediments: different effective confining pressures and clay content analyses 层状含水粘土粉质沉积物的力学变形特性：不同有效围压和粘土含量分析

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-14 DOI: 10.1007/s11440-024-02496-5

Songkui Sang, Liang Kong, Zhaoyuan Zeng, Yapeng Zhao, Jiaqi Liu, Shijun Zhao

{"title":"Mechanical and deformation behavior of layered hydrate-bearing clayey-silty sediments: different effective confining pressures and clay content analyses","authors":"Songkui Sang, Liang Kong, Zhaoyuan Zeng, Yapeng Zhao, Jiaqi Liu, Shijun Zhao","doi":"10.1007/s11440-024-02496-5","DOIUrl":"10.1007/s11440-024-02496-5","url":null,"abstract":"<div><p>The layered distribution of hydrates significantly influences the mechanical properties of hydrate-bearing sediments (HBS). A comprehensive understanding of the mechanical and deformation behaviors of layered HBS is essential for the safe and effective exploitation of hydrates. In this study, marine clay from the South China Sea and quartz sand were used to simulate hydrate-bearing clayey-silty sediments, and layered hydrate-bearing clayey-silty sediments (LHBCSS) were prepared. A series of consolidated-drained triaxial tests were conducted, and the results were compared with those from homogeneous hydrate-bearing clayey-silty sediments (HHBCSS) to analyze the differences in mechanical properties and deformation characteristics. The shear strength and deformation behavior of LHBCSS were further investigated. The results show that the layered distribution of hydrates reduces the initial stiffness and strength of HBS, while promoting strain hardening in the specimens. The failure strength of LHBCSS is significantly influenced by the effective confining pressure, with the clay content having no obvious effect. However, the clay content is negatively correlated with the secant modulus (<i>E</i><sub>50</sub>). The internal friction angle of the LHBCSS is higher than that of the HHBCSS, and the cohesion of the LHBCSS gradually increases with the clay content. The layered hydrate distribution causes the volumetric strain of HBS to favor shear contraction. The maximum shear dilatation rate of LHBCSS is notably lower than that of HHBCSS, and the clay content has a minimal effect on the critical stress ratio of LHBCSS. The layered distribution of hydrates alters the stress behavior between the upper and lower layers of the specimen, with the low hydrate saturation layer having a greater influence on the overall strength and deformation characteristics of the HBS.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 2","pages":"861 - 890"},"PeriodicalIF":5.6,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Effect of multidirectional cyclic loading history on reliquefaction behaviors of sand: a microscale investigation 多向循环加载历史对砂土再液化行为影响的微观研究

IF 5.6 1区工程技术

Acta Geotechnica Pub Date : 2024-12-13 DOI: 10.1007/s11440-024-02477-8

Siyuan Yang, Duruo Huang, Feng Jin

{"title":"Effect of multidirectional cyclic loading history on reliquefaction behaviors of sand: a microscale investigation","authors":"Siyuan Yang, Duruo Huang, Feng Jin","doi":"10.1007/s11440-024-02477-8","DOIUrl":"10.1007/s11440-024-02477-8","url":null,"abstract":"<div><p>Soil elements in situ are subjected to multidirectional shearing during earthquakes. Ignoring the effect of two horizontal shear components generally results in an underestimation of the liquefaction resistance of soils during earthquakes. The actual earthquake sequence generally consists of a mainshock and subsequent aftershocks. Soils may experience liquefaction during the mainshock and then reliquefy again during the subsequent aftershocks. Previous studies on multidirectional loading paths have mainly focused on single liquefaction events. This study employs 3D discrete element modeling to simulate reliquefaction behavior of sands with various multidirectional cyclic simple shear loading histories. The specimens are initially subjected to various strain histories under multidirectional loading paths and then reconsolidated to initial stress states. Subsequently, each soil specimen is subjected to unidirectional cyclic loading in two different directions in the reliquefaction tests. The influence of multidirectional cyclic loading histories on the post-liquefaction drainage compression and reliquefaction resistance are analyzed. Moreover, the evolution of soil fabrics and interaction between fabric orientation and loading direction in the reliquefaction test are investigated. The results highlight that reliquefaction behavior of soils depends on both the fabric and the interaction between the fabric orientation and the loading direction. This study aims to provide micromechanical insight for understanding the effects of multidirectional shearing histories on reliquefaction resistance of sands.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2145 - 2161"},"PeriodicalIF":5.6,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143919292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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