Acta Geotechnica最新文献_第5页

Mechanism of magnesium-enhanced bio-cementation in improving physical and mechanical properties of cemented sands 镁增强生物胶结改善胶结砂物理力学性能的机理

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-30 DOI: 10.1007/s11440-026-02942-6

Chaoxian Wang, Ming Huang, Jim S. Shiau, Mingjuan Cui, Meiling Chen

{"title":"Mechanism of magnesium-enhanced bio-cementation in improving physical and mechanical properties of cemented sands","authors":"Chaoxian Wang, Ming Huang, Jim S. Shiau, Mingjuan Cui, Meiling Chen","doi":"10.1007/s11440-026-02942-6","DOIUrl":"10.1007/s11440-026-02942-6","url":null,"abstract":"<div><p>Microbially induced carbonate precipitation (MICP) is a promising ground improvement technique which has recently gained significant research attention. The magnesium-mediated bio-cementation has been proven to improve the physical and mechanical properties of cemented sand, while little focus has been pay for its underlying mechanism. This study systematically investigates the effects of different magnesium sources and magnesium-to-calcium (Mg/Ca) ratios on the MICP treatment. MICP experiments with different cementation solutions are conducted to reveal the effects of magnesium on carbonate precipitation efficiency, mineral composition, and the mechanical and hydraulic properties of bio-cemented sands. The strength and permeability of the bio-cemented sand are then assessed through UCS and variable-head permeability tests. The results show that magnesium ions not only alter the types and proportions of carbonate crystal forms, but also modify their precipitation patterns within the sand matrix, consequently influencing the macroscopic mechanical and permeability characteristics of bio-cemented sands. The synergistic application of insoluble magnesium sources with soluble calcium sources in MICP process effectively reduces retarding effects of high ion concentration on bacterial urease activity. This optimized approach significantly enhances the macroscopic mechanical performance of bio-cemented soils while maintaining favorable cementation uniformity.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 7","pages":"3865 - 3889"},"PeriodicalIF":6.5,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148386092","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

Thermal conductivity and microstructural evolution of bentonite pellet mixtures under combined temperature and pressure 温压复合条件下膨润土球团混合物导热性能及微观结构演化

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-28 DOI: 10.1007/s11440-026-03000-x

Yunshan Xu, Yanjie Chen, Changjie Zheng, De’an Sun

{"title":"Thermal conductivity and microstructural evolution of bentonite pellet mixtures under combined temperature and pressure","authors":"Yunshan Xu, Yanjie Chen, Changjie Zheng, De’an Sun","doi":"10.1007/s11440-026-03000-x","DOIUrl":"10.1007/s11440-026-03000-x","url":null,"abstract":"<div><p>Bentonite pellet mixtures (BPM) are the preferred buffer for filling various seams or voids in deep geological disposal repositories for high-level radioactive waste. A series of thermal property tests of MX80 BPM was conducted under thermo-hydro-mechanical coupled conditions using the thermal probe method in this study. The potential impacts of particle size distribution, pellet density, pressure, and temperature on the thermal conductivity (TC) of specimens in different initial states, as well as the underlying heat transfer mechanisms, were explored. The macroscopic test results indicated that for the same conditions, the TC of compacted powder specimens was higher than that of BPM, and the TC of two-component mixtures was greater than that of three-component ones. The TC of BPM improved as the pellet density increased, and the impact of pellet density on the TC became more significant as the dry density increased. When pellet density increased from 1.8 to 2.0 g/cm<sup>3</sup>, the TC increase for the specimen with a dry density of 1.5 g/cm<sup>3</sup> was 3.5 times greater than that for the 1.1 g/cm<sup>3</sup> specimen. The temperature effect on specimen TC diminished with increasing applied pressure. The microscopic test results showed that increasing pellet density reduced larger inter-aggregate pores but increased smaller intra-aggregate pores in low-density specimens, while slightly increasing inter-aggregate pores and decreasing intra-aggregate pores in high-density specimens. Under vertical pressure, both pore types decreased, particularly large pores, with higher water content amplifying this compression. Larger and more numerous soil pores enhance vapor-driven latent heat transfer during temperature changes, intensifying its effect on thermal conductivity. Pressure application reduces soil pores, limiting latent heat transfer pathways and thereby diminishing the temperature effect on TC.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 8","pages":"4893 - 4909"},"PeriodicalIF":6.5,"publicationDate":"2026-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163083","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

Physical observations of particle-scale settlement induced by filtration 过滤引起的颗粒级沉降的物理观察

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-27 DOI: 10.1007/s11440-026-02987-7

Yingyi Zhang, Adnan Sufian, Swati Acharya, Alexander Scheuermann

{"title":"Physical observations of particle-scale settlement induced by filtration","authors":"Yingyi Zhang, Adnan Sufian, Swati Acharya, Alexander Scheuermann","doi":"10.1007/s11440-026-02987-7","DOIUrl":"10.1007/s11440-026-02987-7","url":null,"abstract":"<div><p>The deformation of a soil mass induced by filtration is closely associated with the displacement of filter particles. To gain quantitative particle-scale insights to filter particle settlement, transparent soil imaging was employed during filtration experiments. The experiments considered a finer base layer underlying a coarser filter layer, where filtration was triggered with upward seepage flow. A range of filter-base size ratios that covered the complete spectrum of filtration behaviours were considered, along with various levels of seepage flow to investigate the combined influence of geometric characteristics and hydraulic loading. A novel particle detection algorithm was proposed to obtain geometric information of filter particles from the images acquired for the transparent soil assemblies. The filter particle settlement was quantitatively investigated with the particle detection algorithm, and was found to be positively correlated with the inlet flow velocity and the size ratio of the assembly, which was consistent with expectations. While the filter susceptibility has been conventionally evaluated by the size ratio, variability in local filter susceptibility was observed, which was correlated to the local pore geometry of the filter. Local pore geometry was quantitatively characterised by a newly proposed cumulative linear filter porosity associated with detected filter particles that were obtained from the transparent soil images. The observation of local susceptibility highlights the importance of investigating the internal erosion process at the particle scale, and the unique capability of transparent soil imaging in the quantitative investigation of particle behaviour.\u0000</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 7","pages":"3947 - 3960"},"PeriodicalIF":6.5,"publicationDate":"2026-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148386080","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

Modelling soil–structure interaction and liquefaction-induced large deformation under seismic loading using a fully coupled soil–water SPH approach 采用土-水SPH方法模拟地震荷载下土-结构相互作用和液化引起的大变形

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-27 DOI: 10.1007/s11440-026-02996-6

Trieu N. Hoang, Thang T. Nguyen, Tien V. Nguyen, Giang D. Nguyen, Ha H. Bui

{"title":"Modelling soil–structure interaction and liquefaction-induced large deformation under seismic loading using a fully coupled soil–water SPH approach","authors":"Trieu N. Hoang, Thang T. Nguyen, Tien V. Nguyen, Giang D. Nguyen, Ha H. Bui","doi":"10.1007/s11440-026-02996-6","DOIUrl":"10.1007/s11440-026-02996-6","url":null,"abstract":"<div><p>Accurate modelling of earthquake-induced liquefaction and soil–structure interaction remains a major challenge in geotechnical earthquake engineering, owing to the complex coupling between soil, pore water and structure responses under cyclic load. This study advances a fully coupled soil–water SPH approach by incorporating the SANISAND-Sf constitutive model and an explicit formulation for soil–structure interaction, enabling the simulation of liquefaction-induced large deformations and structural movements under seismic loading. The proposed SPH framework is first validated against the LEAP-2022 shaking table test of a sheet-pile wall, and subsequently applied to the Port Island quay wall failure during the 1995 Hyogoken-Nambu earthquake. Comparisons with experimental results and field observations confirm the approach’s ability to capture acceleration responses, excess pore water pressure evolution, and large deformation mechanisms of retaining structures. A parametric study further quantifies the influence of initial relative density on wall performance, revealing that liquefaction of the foundation soil beneath the structure predominantly governs wall displacements, while densification of this zone is markedly more effective than the backfill treatment. The results highlight the capacity of the proposed approach as a powerful tool for analysing soil–structure interaction and guiding seismic countermeasures for retaining systems in liquefiable ground.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 6","pages":"3149 - 3181"},"PeriodicalIF":6.5,"publicationDate":"2026-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-026-02996-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148365912","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

Predictive model for the temperature effect on soil thermal conductivity based on effective medium theory 基于有效介质理论的温度对土壤导热系数影响的预测模型

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-27 DOI: 10.1007/s11440-026-02998-4

Yunshan Xu, Keyao Zhao, Jianping Li, De’an Sun

{"title":"Predictive model for the temperature effect on soil thermal conductivity based on effective medium theory","authors":"Yunshan Xu, Keyao Zhao, Jianping Li, De’an Sun","doi":"10.1007/s11440-026-02998-4","DOIUrl":"10.1007/s11440-026-02998-4","url":null,"abstract":"<div><p>Soil thermal conductivity (STC) is a crucial parameter for the optimal design and safety assessment of underground thermal engineering projects. Accurate prediction of its variation with environmental temperature is therefore significant for guiding practical engineering applications. In this study, an improved effective medium model (IEM) for temperature-dependent STC was developed. By introducing the intraphase contact thermal resistance influence factor (<i>m</i>) and the interphase contact thermal resistance correction factor (<i>p</i>), the model effectively characterizes the nonlinear temperature dependence of contact thermal resistances as well as vapor latent-heat transport. A comprehensive experimental database containing 444 datasets spanning wide ranges of temperature (0 ~ 92 °C), water content (0 ~ 45%), and dry density (1.1 ~ 1.84 g/cm<sup>3</sup>) was established. Based on this database, a detailed analysis was conducted to investigate the influencing factors associated with temperature-induced variations of STC. The performance of the new model was systematically compared against traditional models. The computational results indicate that the proposed model markedly outperforms conventional models, achieving an <i>R</i><sup>2</sup> of 0.898 with <i>RMSE</i> and <i>MAE</i> as low as 0.231 and 0.131, respectively. Compared with the better-performing Tarnawski and Gori models, its <i>RMSE</i> is reduced by 18.4% and 58.6%, respectively. By introducing factors <i>m</i> and <i>p</i>, the new model describes the temperature dependence of STC across varying moisture conditions more accurately, offering broader applicability and stronger potential for practical engineering use.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 8","pages":"4873 - 4892"},"PeriodicalIF":6.5,"publicationDate":"2026-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163030","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

A comparative experimental study of deep-seated landslides in gentle soil slopes triggered by water or hydrogen peroxide 水与过氧化氢诱发的缓坡深层滑坡对比试验研究

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-26 DOI: 10.1007/s11440-026-03004-7

Xingyu Kang, Yi Yang, Zhongqi Quentin Yue

{"title":"A comparative experimental study of deep-seated landslides in gentle soil slopes triggered by water or hydrogen peroxide","authors":"Xingyu Kang, Yi Yang, Zhongqi Quentin Yue","doi":"10.1007/s11440-026-03004-7","DOIUrl":"10.1007/s11440-026-03004-7","url":null,"abstract":"<div><p>This study investigates the mechanisms of landslides in gentle stable soil slopes triggered by injection of either water or hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) solution through flume tests. A cement powder core at the sliding base is used to catalyze the decomposition of a small volume of H<sub>2</sub>O<sub>2</sub> into minimal amounts of water and pressurized oxygen gas mass. Both water and H<sub>2</sub>O<sub>2</sub> solution can trigger the deep-seated landslide in gentle slopes. The water-triggered landslides require the injection of substantial water of 82.9% sliding soil mass with high injection rates. But the H<sub>2</sub>O<sub>2</sub>-triggered landslides require only a small amount of solution of 0.63% to 12.05% of sliding soil mass. The failure modes of the landslides triggered by water or H<sub>2</sub>O<sub>2</sub> solution are different. The water-triggered landslides exhibit ruptures and deep-seated slides. However, the H<sub>2</sub>O<sub>2</sub>-triggered landslides display soil upheaval and penetration. And the controlling factors are systematically analyzed with injection mass and rates, gas accumulation zone, and topographic factors. The results shows that the sliding displacement increases with the increasing of the injected H<sub>2</sub>O<sub>2</sub> solution. Single-event injections cause more sliding displacements than fractional injections. The soil upheaval is positively correlated with the length of gas accumulation zone and inversely correlated with the sliding base angle. The above findings further confirm that the water triggered landslides can be recognized with a large amount of free water or liquified soil associated with the landslide debris while the gas triggered landslides can only have a small amount of free water or liquified soil in the landslide debris.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 8","pages":"4843 - 4872"},"PeriodicalIF":6.5,"publicationDate":"2026-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163029","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

Investigation on internal erosion characteristics and model development under upward seepage with different relative densities 不同相对密度向上渗流条件下内侵蚀特征及模型发展研究

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-24 DOI: 10.1007/s11440-026-02964-0

Lei Dai, Yue Liang, Niuhu Yang, Bin Zhang, Hongjie Zhang, Rifeng Xia, Bin Xu

{"title":"Investigation on internal erosion characteristics and model development under upward seepage with different relative densities","authors":"Lei Dai, Yue Liang, Niuhu Yang, Bin Zhang, Hongjie Zhang, Rifeng Xia, Bin Xu","doi":"10.1007/s11440-026-02964-0","DOIUrl":"10.1007/s11440-026-02964-0","url":null,"abstract":"<div><p>Internal erosion is a major factor in the failure of water-retaining structures, with the initial state of the soil critically influencing its progression. This study investigates the development of internal erosion in gap-graded cohesionless soils through a series of upward seepage tests using an improved triaxial permeameter. Specifically, the influence of initial relative density and hydraulic gradient loading patterns on internal erosion behavior is explored. The findings indicate that under constant hydraulic loading, both the erosion ratio and volumetric deformation exhibit a rapid initial increase followed by stabilization. Moreover, the ultimate erosion ratio initially increases with the hydraulic gradient and then stabilizes, while it decreases with increasing relative density. Conversely, multi-stage hydraulic gradient loading reveals a progression from stabilization to erosion development and eventual failure, characterized by a stepwise increase in the erosion ratio and specimen deformation. It is noteworthy that loose specimens exhibit large volumetric deformation due to erosion, indicative of suffosion, whereas dense specimens exhibit suffusion behavior. Additionally, specimens with higher pre-erosion relative density exhibit greater critical hydraulic gradients, indicating improved erosion resistance. These results underscore the practical significance of pre-erosion density in assessing internal erosion evolution. Finally, building on the continuity hypothesis and incorporating critical state theory with a nonlinear incremental stress–strain relationship, an erosion model accounting for the pre-erosion relative density was developed. The model was calibrated using constant hydraulic gradient tests and validated against multi-stage test results, demonstrating its feasibility in accurately predicting the development of internal erosion in cohesionless soils.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 8","pages":"4825 - 4842"},"PeriodicalIF":6.5,"publicationDate":"2026-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163034","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

Pullout responses of root-inspired anchors in transparent soil: visualizing anchor-soil interaction and correlation analysis 透明土壤中受根启发的锚的拉拔响应：可视化锚-土相互作用和相关分析

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-23 DOI: 10.1007/s11440-026-03010-9

Ruijie Huang, Luqi Wang, Wengang Zhang, Matteo Oryem Ciantia, Alejandro Martinez, Ningning Zhang, Jian Yin

{"title":"Pullout responses of root-inspired anchors in transparent soil: visualizing anchor-soil interaction and correlation analysis","authors":"Ruijie Huang, Luqi Wang, Wengang Zhang, Matteo Oryem Ciantia, Alejandro Martinez, Ningning Zhang, Jian Yin","doi":"10.1007/s11440-026-03010-9","DOIUrl":"10.1007/s11440-026-03010-9","url":null,"abstract":"<div><p>Understanding the pullout responses of root-inspired branching anchors is essential for developing efficient bio-inspired anchorage and foundation systems. In this study, transparent soil modeling using both transparent sand and transparent cemented soil was employed to investigate the pullout capacity and anchor-soil interaction of anchors with varying branch configurations. The pullout response exhibited three stages: initial increase, peak resistance, and post-peak softening. Anchors in transparent cemented soils (TCS) achieved greater peak forces with larger displacements than in sand, and the pullout capacity increased with branch number, angle, and node in both soils. Particle image velocimetry revealed that soil deformation initiated locally around branch nodes and lateral branches and progressively expanded vertically, evolving into a soil mobilization dominated by soil arching as branch number increased. In TCS, shallow failure developed sequentially through surface heave, shaft cracking, branch cracking, and failure surface expansion, with more complex branch configurations mobilizing larger soil volumes and triggering earlier acceleration in mobilization. Correlation analyses among pullout mechanical indicators, soil failure metrics, and anchor morphological descriptors showed a strong linear relationship between peak pullout force and total mobilized soil volume. The vertical projected area (A<sub>bearing</sub>) emerged as a robust first-order parameter linking anchor geometry, soil mobilization, and pullout capacity. These findings provide direct visualized insights into anchor-soil interaction mechanisms and offer guidance for the rational design of root-inspired anchorage systems.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 8","pages":"4777 - 4797"},"PeriodicalIF":6.5,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163166","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

Undrained anisotropy and non-coaxial response of soft clay under monotonic and cyclic shearing with varying principal stress orientations 不同主应力方向单调和循环剪切作用下软黏土不排水各向异性及非同轴响应

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-23 DOI: 10.1007/s11440-026-03005-6

Zhouhuan Shi, Yang Yu, Lizuo Zhao, Kun Pan, Zhongxuan Yang, Yuanqiang Cai

{"title":"Undrained anisotropy and non-coaxial response of soft clay under monotonic and cyclic shearing with varying principal stress orientations","authors":"Zhouhuan Shi, Yang Yu, Lizuo Zhao, Kun Pan, Zhongxuan Yang, Yuanqiang Cai","doi":"10.1007/s11440-026-03005-6","DOIUrl":"10.1007/s11440-026-03005-6","url":null,"abstract":"<div><p>In geotechnical engineering practice, soft clay foundations frequently experience an initial inclination of the principal stress axis before being subjected to either proportional or non-proportional loading. Such initial stress conditions can significantly influence the subsequent shear response and failure mechanisms, inducing both anisotropy and non-coaxiality. In this study, a series of undrained monotonic and cyclic hollow cylinder torsional shear tests were conducted on reconstituted soft clay specimens that underwent anisotropic consolidation with varying initial principal stress orientations. The results show that the undrained shear strength obtained from the monotonic loading tests is influenced by the inclination angle of the major principal stress relative to the vertical axis, denoted as <i>α</i><sub>0</sub>. Comparable strength anisotropy was observed in cyclic tests, with the most pronounced strain accumulation occurring at <i>α</i><sub>0</sub> = 45°, under cyclic loading both with and without continuous principal stress rotation (PSR). Moreover, cyclic PSR markedly accelerates the accumulation of permanent deformation and induces more pronounced non-coaxial responses than orientational monotonic or cyclic shearing. Analysis of the non-coaxiality angle reveals prominent non-coaxial responses during orientational shearing at <i>α</i><sub>0</sub> = 22.5° and 67.5°, while rotational cycling produces evident non-coaxial responses across all <i>α</i><sub>0</sub> cases. Notably, the rotational non-coaxiality diminishes when the stress direction rotates and aligns near <i>α</i><sub>0</sub> ± 10°. These findings provide comprehensive experimental evidence for the anisotropic and non-coaxial behavior of soft clay, offering valuable insights for geotechnical analysis and design in practice.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 8","pages":"4735 - 4750"},"PeriodicalIF":6.5,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11440-026-03005-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163027","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

Parametric study on topographic amplification effect of soil slope under the coupling of soil nonlinearity and oblique incidence 土壤非线性与斜入射耦合下土坡地形放大效应的参数化研究

IF 6.5 1区工程技术

Acta Geotechnica Pub Date : 2026-03-23 DOI: 10.1007/s11440-026-03008-3

Haowei Yang, Jie Cui, Yadong Li, Pengfei Dang, Yi Shan

{"title":"Parametric study on topographic amplification effect of soil slope under the coupling of soil nonlinearity and oblique incidence","authors":"Haowei Yang, Jie Cui, Yadong Li, Pengfei Dang, Yi Shan","doi":"10.1007/s11440-026-03008-3","DOIUrl":"10.1007/s11440-026-03008-3","url":null,"abstract":"<div><p>Soil nonlinearity and the oblique incidence of seismic waves play crucial roles in the terrain amplification effect observed in slopes. To systematically investigate the underlying mechanisms and general behaviors of terrain amplification in soil slopes subjected to the coupled effects of nonlinearity and oblique incidence, a two-dimensional numerical model was developed. This model incorporates viscoelastic artificial boundaries and an equivalent linear viscoelastic constitutive approach. Through a parametric study, the effects of soil nonlinearity and oblique incidence on terrain amplification were evaluated across a range of slope angles, shear wave velocities, and input motion amplitude. The results indicate that soil nonlinearity generally diminishes terrain-induced amplification and shifts the fundamental site frequency to lower values. Oblique incidence, relative to vertical incidence, not only intensifies amplification effects but also alters the resonance frequency. Compared with acceleration amplification factor, spectral amplification factor is generally more conservative and better capture frequency-dependent amplification across the response spectrum. Neglecting soil nonlinearity in the Chinese seismic code GB50011-2010 leads to a 6.56% overestimation of the horizontal acceleration amplification factor. These findings offer valuable contributions to increasing the accuracy of seismic geohazard risk assessments and informing advancements in seismic design codes.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"21 8","pages":"4751 - 4776"},"PeriodicalIF":6.5,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149163028","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