Soil Dynamics and Earthquake Engineering最新文献

{"title":"Revolutionary tuned mass damper by carbon fiber powder based shear thickening fluid to realize adaptive stiffness and damping","authors":"Li Sun ,&nbsp;Tianqi Liang ,&nbsp;Meng Hou ,&nbsp;Xin Sha ,&nbsp;Chunwei Zhang","doi":"10.1016/j.soildyn.2025.109732","DOIUrl":"10.1016/j.soildyn.2025.109732","url":null,"abstract":"<div><div>The tuned mass damper (TMD), as a classical passive vibration control method, have been widely applied to protect building structures from wind and earthquake-induced vibrations. However, conventional passive TMDs suffer from fixed spring and damping characteristics, limiting their adaptability to varying frequencies and excitation conditions. In this work, a novel nonlinear TMD is proposed by incorporating a carbon fiber powder-based shear thickening fluid (CFP-STF), whose frequency-dependent rheological properties extend the effective control bandwidth of the TMD. Based on the fixed-point theory, the CFP-STF based TMD design methodology with a simplified lumped mass model is proposed to optimize the vibration control performance. The analysis and comparison of the CFP-STF based TMD with the uncontrolled structure and two constant damping TMDs are carried out to demonstrate its advantages over traditional passive control methods. The results demonstrate that the CFP-STF-based TMD significantly enhances broadband vibration control performance and effectively mitigates the detuning effect observed in conventional systems. Furthermore, optimal vibration suppression requires tuning the rheological properties of the STF to match the dynamic and damping characteristics of the main structure.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109732"},"PeriodicalIF":4.6,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895338","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":"Numerical modelling of ground-borne vibration from a metro tunnel embedded in saturated soil strata using a 2.5D fully-coupled formulation","authors":"Longxiang Ma ,&nbsp;Haijiang Zhu ,&nbsp;Yuqi Liu ,&nbsp;Ding Long ,&nbsp;Chenxi Xue ,&nbsp;Bolong Jiang","doi":"10.1016/j.soildyn.2025.109752","DOIUrl":"10.1016/j.soildyn.2025.109752","url":null,"abstract":"<div><div>Although many metro tunnels are constructed in soil strata that are already saturated, the efficient and accurate modelling of ground-borne vibration from a metro tunnel embedded in saturated soil strata is still limited. Within this framework, this paper presents a 2.5D(two-and-a-half-dimensional) numerical model to calculate the ground-borne vibration from a metro tunnel embedded in saturated soil strata, which well represents the fully-coupled train-track-tunnel-soil system and takes the effect of groundwater into account. In this model, the soil mediums beneath the ground water table are modelled by fully saturated poroelastic mediums governed by Biot's theory, while the other soil mediums and the tunnel structure are modelled by single-phase elastic mediums governed by viscoelastic dynamics theory. In the meanwhile, the metro track is modelled as infinitely long Euler beams connecting the tunnel base structure through the distributed spring-damper elements representing the fasteners, and the train composed of several vehicles is modelled by multiple rigid bodies connected by spring and damping systems. The governing equations of the track-tunnel-soil system are first formulated in the framework of a 2.5D approach, and the moving train is then subsequently coupled to it to provide a dynamic response solution of the coupled train-track-tunnel-soil system. The proposed model is thoroughly validated by comparing its simulated results with the corresponding field measurements. Additionally, the importance of accounting for the liquid phase's impact on metro-train induced environmental vibration in saturated soil regions is clearly shown.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109752"},"PeriodicalIF":4.6,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seismic performance of a precast bridge pier with a novel externally assembled 3U energy dissipator (EA3UED): Experimental and analytical study","authors":"Rashad Al-Shaebi ,&nbsp;Ning Li ,&nbsp;Mohammed Al-Haaj ,&nbsp;Qahtan Al-Shami ,&nbsp;Mohammed Amer ,&nbsp;Ahmed Al-Olofi","doi":"10.1016/j.soildyn.2025.109726","DOIUrl":"10.1016/j.soildyn.2025.109726","url":null,"abstract":"<div><div>Precast Bridge Piers (PBPs) face challenges such as insufficient energy dissipation, flexure-shear coupling with complex load transfer, reducing their seismic resilience. This study introduces a novel External Assembled 3U Energy Dissipator (EA3UED), designed to overcome these inherent limitations and enhance the seismic performance of PBPs. The EA3UED is attached using a unique steel band to the pier, comprising three U-shaped components of high-strength steel. It provides multi-directional resistance and allows for post-earthquake inspection and replacement, offering a cost-efficient and maintainable solution. Experimental tests were conducted to evaluate the effectiveness and compare the seismic performance of PBPs with and without EA3UEDs. Additionally, simplified analytical solutions were proposed to derive the initial, yield, and ultimate capacities, showing a good agreement with experimental data and proving effective for preliminary design and optimization. Results demonstrated that integrating the EA3UED on PBPs significantly enhances their seismic resilience. Compared to the conventional precast pier (P-NED), the EA3UED-equipped pier (P-EA3UED) exhibited improvements in lateral load capacity (28.03%), energy dissipation (86.88%), stiffness (30.0%), and residual displacement (64.54% reduction). The primary failure mode in P-EA3UED was yielding of the U-shaped component with less damage bottom column, while P-NED failed with severe damage in the lower column region. The EA3UED’s adaptable design suits both precast and new construction applications and offers a cost-effective solution, particularly in high seismic zones. The EA3UED integration on PBPs using the unique steel band improves seismic resilience without compromising constructability or cost-efficiency. This study confirms the EA3UED as a promising enhancement for seismic-resistant bridge design, contributing to safer and more resilient infrastructure.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109726"},"PeriodicalIF":4.6,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An efficient computational model for large-scale structures based on improved hippopotamus optimization and time-domain inversion","authors":"Siyuan Li ,&nbsp;Jing Li ,&nbsp;Jianyun Chen ,&nbsp;Qiang Xu ,&nbsp;Jiahui Guo ,&nbsp;Xiangyu Cao ,&nbsp;Pengfei Liu","doi":"10.1016/j.soildyn.2025.109735","DOIUrl":"10.1016/j.soildyn.2025.109735","url":null,"abstract":"<div><div>Seismic safety assessment of large concrete dams necessitates comprehensive consideration of soil-structure interaction (SSI) effect. However, excessive computation time for soil-structure models limits seismic samples. Furthermore, the simplified homogeneous foundation assumption neglects joints and cracks, leading to large discrepancies between simulated and measured seismic responses. To address these issues, this study proposes an efficient computational model (hereafter termed the equivalent model) construction method based on time-domain foundation model identification using the improved Hippopotamus optimization algorithm (IHO-TFMI), with the core program being open-source. Specifically, this study establishes a surrogate foundation model with clear physical mechanisms at structural boundaries, then derives a response surface between foundation model parameters and structural response errors by integrating SSI mechanisms. The IHO is proposed for the solution space features of the objective function, ultimately yielding a precise equivalent model. Three case studies with varying complexity demonstrate the method's reliability. The results show that the constructed structural equivalent model achieves excellent agreement with the SSI model, with the MSE of time-history responses reduced below 0.01. Computationally, the 3D equivalent model reduces calculation time by 92 % and storage usage by 99.8 % compared to the SSI model. Meanwhile, IHO outperforms other optimizers in global search capability, and the self-developed TFMI program reduces optimization time from days (with direct FEM software calls) to minutes. In conclusion, the proposed method provides an efficient and accurate alternative to traditional large-scale complex foundation modeling, facilitating advancements in research requiring massive seismic sample iterations, particularly in seismic fragility analysis of large-scale structures.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109735"},"PeriodicalIF":4.6,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893209","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":"The influence of particle shape and loading waveform on the dynamic properties of base materials in high-speed railway slab tracks: A discrete element analysis","authors":"Nazanin Mahbubi Motlagh ,&nbsp;Hamoun Alimoradi ,&nbsp;Mohammad Shamsi","doi":"10.1016/j.soildyn.2025.109751","DOIUrl":"10.1016/j.soildyn.2025.109751","url":null,"abstract":"<div><div>This study investigates the dynamic behavior of base materials in high-speed railway slab tracks using a combined experimental and numerical approach. Cyclic triaxial tests under sinusoidal loading were performed to calibrate Discrete Element Method (DEM) simulations. The effects of particle shape (high, medium, low aspect ratios) and loading waveforms (sinusoidal, triangular, rectangular) at varying frequencies were evaluated under drained conditions. Results show that higher loading frequencies-simulating faster train speeds-increased shear modulus, while lower frequencies enhanced energy dissipation and reduced stiffness, particularly at low shear strains. Rectangular loading produced greater stiffness and energy dissipation compared to sinusoidal and triangular forms. Power-law equations were developed to predict shear modulus and damping ratio based on shear strain, confining pressure, void ratio, particle shape, loading frequency and waveform. Micromechanical analysis showed that high-aspect ratio particles under rectangular loading exhibited the highest coordination numbers, contact forces, displacement, and rotation. Although higher aspect ratio intensified contact forces, it had a limited effect on the spatial distribution of force chains. These findings offer valuable insights for the design and performance evaluation of sub-ballast and base layers under dynamic loading, particularly in cases where in-situ testing is impractical.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109751"},"PeriodicalIF":4.6,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893187","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 fuzzy-controlled semiactive electromagnetic seismic isolation system for near-fault and far-field motions","authors":"Ging-Long Lin ,&nbsp;Chih-Shiuan Lin ,&nbsp;Chi-Chang Lin ,&nbsp;Tse-Chi Chen","doi":"10.1016/j.soildyn.2025.109748","DOIUrl":"10.1016/j.soildyn.2025.109748","url":null,"abstract":"<div><div>Traditional passive seismic isolation systems, with their fixed damping ratios, struggle to simultaneously address the isolation demands posed by near-fault and far-field ground motion. Although these systems demonstrate superior performance in reducing the absolute acceleration response under far-field ground motion, they can lead to excessive displacement in the isolation layer under near-fault ground motion, increasing the risk of system collision. To overcome this limitation, this study proposes a semiactive electromagnetic seismic isolation system (SA-EMSIS) featuring a continuously controllable damping ratio. A prototype of the SA-EMSIS was developed, and a fuzzy logic control algorithm was implemented to adaptively adjust damping in real time, aiming to preserve the isolation efficiency of the passive system during far-field events while effectively mitigating displacement during near-fault events. The fuzzy controller was further optimized using a multi-objective genetic algorithm to balance acceleration and displacement performance across different seismic inputs. Results from shaking table experiments agreed well with their counterparts in theoretical simulations, validating both the accuracy of the SA-EMSIS model and the reliability of the experimental setup. Compared with traditional passive systems, the SA-EMSIS provides more comprehensive seismic isolation, performing well across far-field, weak near-fault, and strong near-fault ground motion. This study highlights the integration of fuzzy logic control with a variable-damping electromagnetic system as a novel and effective approach for real-time semiactive isolation. The proposed approach demonstrates clear advantages in adaptability and control precision, offering a practical solution for protecting structures and equipment under diverse seismic hazards.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109748"},"PeriodicalIF":4.6,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seismic behavior of buildings with tuned mass friction dampers optimized with a novel PSO-GWO hybrid algorithm","authors":"Salah Djerouni ,&nbsp;Reyes Garcia","doi":"10.1016/j.soildyn.2025.109739","DOIUrl":"10.1016/j.soildyn.2025.109739","url":null,"abstract":"<div><div>Tuned mass friction dampers (TMFDs) are very effective at controlling the response of structures. However, the TMFDs’ parameters need to be optimized during design, which is complex if multi-degree of freedom systems (MDOF) and real ground motion records are adopted. This article examines numerically the effectiveness of TMFDs and tuned mass dampers (TMDs) at reducing the response of MDOF buildings subjected to seismic excitations. The design parameters of TMFDs and TMDs (mass, damping, frequency and friction coefficient) are first optimized by adopting a novel and efficient “hybrid” algorithm that combines a particle swarm optimization (PSO) and a grey wolf optimization (GWO). Next, four moment resisting frame buildings (3, 6, 9 and 12-stories) with a TMFD or a TMD device at the top floor are considered to derive the governing differential equations of motion. The displacement demand of the top floor is selected as a target of the objective function to be minimized. After the optimization, the four frame buildings with a TMFD/TMD device and counterpart non-controlled frames are subjected to 100 far-field and near-field (with/without pulse) earthquakes. The results show that, for equal masses, the TMFD control device can provide control performance comparable to the TMD device. For the 3,6 and 9-story buildings, the optimized TMD device reduces the displacement demand by an additional 10 % over counterpart buildings with an optimized TMFD. Conversely, for the 12-story frame, TMFD reduces the displacement demand by an additional 10 % over the TMD device. This suggests that TMFD devices are more effective in high-rise buildings. The stroke demand in the TMFD is generally superior to that provided by the TMD with respect to the displacement demand of a non-controlled building. This article contributes towards the development of more effective hybrid optimization design tools for passive control systems, which in turn is expected to promote their wider adoption in the design of controlled buildings.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109739"},"PeriodicalIF":4.6,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895340","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 dimensional shear wave velocity (Vs) structure and dynamic soil properties of Adıyaman-Gölbaşı basin using HVSR and SPAC methods","authors":"Eren Pamuk ,&nbsp;Seyhan Fırat ,&nbsp;Aydın Büyüksaraç ,&nbsp;Kemal Önder Çetin ,&nbsp;Özcan Bektaş ,&nbsp;Nihat Sinan Işık ,&nbsp;Halil Erdim Sarıtepe","doi":"10.1016/j.soildyn.2025.109744","DOIUrl":"10.1016/j.soildyn.2025.109744","url":null,"abstract":"<div><div>On February 6, 2023, two devastating earthquakes (M_w 7.8 and M_w 7.6) struck southeastern Türkiye, two of the most destructive seismic events in the country's history. This study investigates the structural damage and seismic vulnerability in the Gölbaşı Basin, located in Adıyaman Province—one of the regions most severely affected by these events. Geophysical techniques, the HVSR (Nakamura) and spatial autocorrelation (SPAC) methods, were employed to develop shear wave velocity (Vs) profiles and evaluate the dynamic soil properties of the basin. Shear wave velocities within the Gölbaşı Basin, down to a depth of 300 m, range from 211 to 923 m/s, with the lowest values observed near the lake, indicating weak and loose soil conditions. Natural site periods vary between 0.1 s and 2.86 s, with the longest periods (T &gt; 2.5 s) also concentrated in the vicinity of the lake. In areas where the engineering bedrock (Vs &gt; 760 m/s) lies deeper than 250 m, natural periods frequently exceed 1.5 s. These findings suggest that zones with thick alluvial deposits and low Vs values are particularly susceptible to seismic hazards. Structural damage was most severe in areas where Vs is below 350 m/s, site periods exceed 1 s, and the engineering bedrock lies deeper than 50 m. Notably, low-rise industrial buildings and low-rise structures with basement floors remained intact despite poor soil conditions. In contrast, in areas with more competent ground conditions, structural collapses were more likely caused by deficiencies in engineering design or construction quality.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109744"},"PeriodicalIF":4.6,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144892026","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":"Corrigendum to “Dynamic characterization of sand under low confinement stress via shear box testing on shaking table” [Soil Dyn Earthq Eng 195 (2025) 109398]","authors":"Shahin Huseynli,&nbsp;Ella E. Lee,&nbsp;Dimitris Karamitros,&nbsp;Matthew S. Dietz,&nbsp;Flavia De Luca","doi":"10.1016/j.soildyn.2025.109745","DOIUrl":"10.1016/j.soildyn.2025.109745","url":null,"abstract":"","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"198 ","pages":"Article 109745"},"PeriodicalIF":4.6,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996861","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":"Evaluation of seismic wave coherency considering spatial variability of model ground","authors":"Sugeun Jeong ,&nbsp;Yonghee Lee ,&nbsp;Yong Jin ,&nbsp;Daehyeon Kim","doi":"10.1016/j.soildyn.2025.109722","DOIUrl":"10.1016/j.soildyn.2025.109722","url":null,"abstract":"<div><div>This study experimentally evaluates seismic wave coherency with respect to the spatial variability of model ground using a 1g shaking table and a Laminar Shear Box (LSB). Two types of model grounds, silica sand and weathered soil, were constructed to analyze the effect of spatial variability on seismic wave coherency. The spatial variability was assessed by measuring the shear wave velocity using a Miniature Cone Penetration Test (Mini-CPT). The silica sand model ground exhibited a coefficient of variation (CV) of 18.73 %, indicating relatively homogeneous characteristics, whereas the weathered soil model ground showed a CV of 45.71 %, reflecting high heterogeneity. Unlagged and lagged coherency calculations were performed using 30 scaled seismic records with a peak acceleration of 0.03 g. The results showed that coherency decreased with increasing frequency and separation distance, with a particularly pronounced reduction in the high-frequency range. The weathered soil model ground exhibited a steep decline in coherency above 20 Hz due to its heterogeneous composition, while the silica sand model ground maintained relatively stable coherency across all frequency ranges. The coherency regression analysis was performed in the atanh domain and back-transformed to the original scale for comparison with the measured data. This study highlights the importance of considering spatial variability in seismic design, particularly in high-frequency regions where coherency reduction becomes significant. These findings contribute to developing more reliable site-specific seismic design methodologies.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109722"},"PeriodicalIF":4.6,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144887333","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}