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

A non-preload variable friction inerter system for response reduction of structures subjected to harmonic and seismic ground excitations 一种用于减少结构在谐波和地震地面激励下的响应的无预紧变摩擦干涉系统

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-16 DOI: 10.1016/j.soildyn.2025.109803

Wei Liu , Yuhong Ma , Guifeng Zhao , Zhenyu Yang , Sihua Kong , Jiachuan Chen , Heng Yang

{"title":"A non-preload variable friction inerter system for response reduction of structures subjected to harmonic and seismic ground excitations","authors":"Wei Liu , Yuhong Ma , Guifeng Zhao , Zhenyu Yang , Sihua Kong , Jiachuan Chen , Heng Yang","doi":"10.1016/j.soildyn.2025.109803","DOIUrl":"10.1016/j.soildyn.2025.109803","url":null,"abstract":"<div><div>The performance of conventional friction dampers is sensitive to the constant preload force, making it difficult to effectively suppress displacement, velocity, and acceleration responses at various levels of earthquakes. Based on the authors' previous development of a Non-Preload Variable Friction Inerter (NVFI), this study explores its underlying dynamic mechanisms, uses harmonic excitation analysis to evaluate the system's frequency adaptability. The NVFI integrates adaptive friction effect and inertial amplification through terminal springs and a ball-screw-based inerter. A comprehensive theoretical framework is established to describe the dynamic behavior of the system, followed by harmonic response and seismic analysis for performance quantification. The results indicate that under seismic excitations of 0.6g, the NVFI reduces displacement, velocity, and acceleration responses by 53.65 %, 39.34 %, and 46.74 %, respectively, achieving 20–30 % higher efficiency than friction dampers. Harmonic analysis confirms the frequency adaptability of the NVFI, showing effective suppression of resonance peaks across a wide frequency range. Energy dissipation evaluations demonstrate a 19.8 % reduction in the seismic input energy, attributable to the ability of the inerter to absorb and redistribute dynamic loads. In addition, the damping ratio of the NVFI remains consistently stable across varying seismic intensities, with values ranging from 0.179 to 0.219 and an average of around 0.201. This stability ensures reliable energy dissipation and long-term damping performance under various earthquake levels. These findings validate the robust damping mechanism of the NVFI and support its suitability for seismic protection in critical infrastructure, particularly when multi-level seismic input is considered.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109803"},"PeriodicalIF":4.6,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105273","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 field testing of a 15-year-old friction pendulum base-isolated residential building 15年摩擦摆基础隔震住宅动力场试验

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-16 DOI: 10.1016/j.soildyn.2025.109802

P.M. Calvi, A. Rapone, T.C. Becker, H. Sucuoglu, G. Gabbianelli, B. Chalarca, I. Lanese, G.J. O'Reilly, E. Rizzo-Parisi, F. Dacarro

{"title":"Dynamic field testing of a 15-year-old friction pendulum base-isolated residential building","authors":"P.M. Calvi, A. Rapone, T.C. Becker, H. Sucuoglu, G. Gabbianelli, B. Chalarca, I. Lanese, G.J. O'Reilly, E. Rizzo-Parisi, F. Dacarro","doi":"10.1016/j.soildyn.2025.109802","DOIUrl":"10.1016/j.soildyn.2025.109802","url":null,"abstract":"<div><div>This paper presents a landmark full-scale experimental program aimed at advancing the understanding of long-term performance of seismic base isolation for buildings in real service conditions. A three-story residential structure in Arischia (L'Aquila, Italy), base-isolated with Friction Pendulum (FP) bearings in service for over 15 years, was subjected to in-situ dynamic testing. Using custom-designed self-reacting frames and the EUCENTRE's mobile laboratory, displacement-controlled sinusoidal loading histories were applied, covering a range of amplitudes and peak velocities. This paper details the test specimen, experimental setup, loading protocols, and instrumentation. It presents preliminary findings on key isolation system properties, including post-elastic stiffness, static and dynamic friction coefficients, and equivalent damping ratio. These results provide rare field-based insight into the effects of aging on FP isolators and offer critical validation data for models used in performance-based assessment of base-isolated structures. In addition, the study demonstrates the feasibility and value of in-situ testing, which can serve as a model for future full-scale investigations of base-isolated buildings.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109802"},"PeriodicalIF":4.6,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105341","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

Seismic fragility analysis for prestressed concrete containments of nuclear power plants based on stripe-based approach 基于条形法的核电站预应力混凝土围护结构地震易损性分析

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-15 DOI: 10.1016/j.soildyn.2025.109804

Chanyoung Kim , Hoang D. Nguyen , Oh-Sung Kwon , Myoungsu Shin

{"title":"Seismic fragility analysis for prestressed concrete containments of nuclear power plants based on stripe-based approach","authors":"Chanyoung Kim , Hoang D. Nguyen , Oh-Sung Kwon , Myoungsu Shin","doi":"10.1016/j.soildyn.2025.109804","DOIUrl":"10.1016/j.soildyn.2025.109804","url":null,"abstract":"<div><div>The Separation of Variables (SOV) approach has been widely used for the seismic fragility analysis of nuclear power plant structures. It begins with linear elastic analysis, and inelastic behavior (e.g., changes in stiffness and damping ratio) is indirectly considered employing the inelastic energy absorption factor. However, recent studies suggest enhancing the accuracy of fragility curves through nonlinear analysis. This study evaluates the efficacy of two-stripe based nonlinear approaches: Method A (fitting a lognormal function) and maximum likelihood estimation (MLE) for assessing the seismic fragility of prestressed concrete containment structures. It also proposes damage measures and failure criteria suitable for considering the effects of uncertainties in structural parameters on failure under high earthquake loads. The uncertainty of demand is assessed utilizing 30 sets of ground motion time histories. The uncertainty of capacity is assessed using 30 random variable sets of three material properties-concrete compressive strength, 1st natural frequency, and damping ratio-generated by Latin hypercube sampling. Pushover and time-history analysis indicate that failure criteria based on lateral drift consistently capture failure more accurately than those based on base shear or strain levels. Both stripe-based approaches yield median capacities within 2 % of the SOV method. When accounting for uncertainties in both demand and capacity, the stripe-based approaches align better with observed failure ratios at high PGA levels, though MLE tends to overestimate failure ratios at lower PGA. These findings suggest that combining method A and MLE can more comprehensively capture nonlinear behavior across the full PGA range, leading to more accurate failure predictions.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109804"},"PeriodicalIF":4.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060034","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

Analytical solution for seismic response of deep fluid-filled tunnel subjected to P and SV waves P波和SV波作用下深部充液隧道地震响应解析解

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-15 DOI: 10.1016/j.soildyn.2025.109798

Haitao Yu , Jinghao Yang , Gong Chen , Shuan Li , Qingzhi Wang , Wuyu Zhang

{"title":"Analytical solution for seismic response of deep fluid-filled tunnel subjected to P and SV waves","authors":"Haitao Yu , Jinghao Yang , Gong Chen , Shuan Li , Qingzhi Wang , Wuyu Zhang","doi":"10.1016/j.soildyn.2025.109798","DOIUrl":"10.1016/j.soildyn.2025.109798","url":null,"abstract":"<div><div>A novel analytical solution is derived that provides closed-form formulations for seismic response of a deep fluid-filled tunnel subjected to incident plane P and SV waves. For the derivation, the tunnel is assumed to be fully filled with an incompressible, inviscid, and irrotational fluid. Under such conditions, only P-waves can propagate in the infilled fluid. It is also assumed that the ground and liner are homogeneous, isotropic and linear elastic, with a no-slip condition at all contact interfaces. The incident P and SV waves is assumed to be perpendicular to the tunnel axis, and thus the plane strain condition is applied. The potentials of the diffracted waves by the tunnel and infilled water are expanded by Bessel-Fourier series to obtain the solution. The analytical solution is verified by comparing its results with those obtained from the finite element method. The interaction between the hydrodynamic pressure and soil pressure on the fluid-filled tunnel under SV wave and P wave is analyzed to investigate the coupling mechanisms among the internal fluid, tunnel, and surrounding ground, and a non-fluid tunnel is included, serving as a benchmark for comparative analysis to understand the influence of hydrodynamic pressures on the fluid-filled tunnel. Parametric analyses are carried out to investigate the influence of frequency of the incident SV and P waves and flexibility ratio of the ground and tunnel on the seismic performance of fluid-filled tunnels.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109798"},"PeriodicalIF":4.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060159","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

Deep learning-based predication of the input energy spectra for self-centering systems 基于深度学习的自定心系统输入能谱预测

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-15 DOI: 10.1016/j.soildyn.2025.109805

Ge Song , Lili Xing

{"title":"Deep learning-based predication of the input energy spectra for self-centering systems","authors":"Ge Song , Lili Xing","doi":"10.1016/j.soildyn.2025.109805","DOIUrl":"10.1016/j.soildyn.2025.109805","url":null,"abstract":"<div><div>The accurate prediction of input energy spectra is crucial for the application of energy-based design methodologies. In this study, a deep-learning based artificial neural network (ANN) is utilized to evaluate the input energy spectra for self-centering single-degree-of-freedom (SDOF) systems. A dataset comprising 225 self-centering systems with varying structural characteristics is created to generate input energy spectra under 360 ground motions, specifically selected in accordance with the soil types outlined in the Chinese code. The ANN model, which incorporates a multi-input module, is developed to simultaneously consider both seismic and structural features during the prediction process. Structural features, including energy ratio <em>η</em>, damping ratio <em>ξ</em>, and ductility factor <em>μ</em> are extracted and used as inputs, while different seismic response spectra are employed to derive seismic features for the ANN model. The effectiveness of utilizing various input features is examined in terms of the model's performance and generalization capability. Furthermore, sensitivity analyses are performed to investigate the importance of different structural features in predicting the input energy spectra for self-centering systems and to evaluate the model's generalization capability. The results demonstrate that the proposed ANN model reliably predicts the input energy spectra for self-centering systems, regardless of variations in structural features and input ground motions. Moreover, displacement response spectra are shown to yield better performance as input earthquake features for the ANN model. Sensitivity analyses further indicate that the model, when using only <em>ξ</em> and <em>μ</em> as input structural features, maintains satisfactory performance and generalization capability, whereas the influence of <em>η</em> on the input energy spectra for self-centering systems is found to be negligible.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109805"},"PeriodicalIF":4.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060035","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

Application and verification of random vibration method for simply supported beam bridge crossing strike slip fault 跨走滑断层简支梁桥随机振动法的应用与验证

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-15 DOI: 10.1016/j.soildyn.2025.109799

Hongyu Jia , Chuzhao Xiao , Longwei Ma , Canhui Zhao , Shixiong Zheng

{"title":"Application and verification of random vibration method for simply supported beam bridge crossing strike slip fault","authors":"Hongyu Jia , Chuzhao Xiao , Longwei Ma , Canhui Zhao , Shixiong Zheng","doi":"10.1016/j.soildyn.2025.109799","DOIUrl":"10.1016/j.soildyn.2025.109799","url":null,"abstract":"<div><div>This paper proposes a model for spatially varying fault-crossing ground motions, incorporating pulse effect and permanent ground surface displacement due to directivity and fling-step effect. The model is constructed through a superposition of high- and low-frequency components in the frequency domain. To develop a spatially varying fault-crossing ground motion model, the power spectral density (PSD) of a low-frequency single-pulse velocity is combined with a high-frequency PSD. This model captures the effect of local site conditions, wave passage, and coherence on the structural responses of fault-crossing bridges. A theoretical stochastic analysis scheme based on the pseudo-excitation method (PEM) is then introduced for seismic analysis of simply supported bridges subjected to spatially varying fault-crossing ground motions. The accuracy and efficiency of this PEM are verified through comparative analysis with the nonlinear time history method (NTHM) using the equivalent ground motion inputs. These inputs are derived by transforming the proposed fault-crossing seismic model from the frequency domain into time-domain ground motion time histories. To facilitate the use of the proposed spatially varying fault-crossing ground motion model and efficient PEM in stochastic seismic analyses of complex, critical bridges, the scheme is implemented and verified within a general finite element platform. It is subsequently applied to a fault-crossing simply supported bridge under spatially varying ground motions, accounting for pulse effect and spatial variability. Conclusions are drawn that support applications in the seismic design and analysis of fault-crossing bridges exposed to the high-velocity pulse effect and multiple spatially varying ground motion excitations.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109799"},"PeriodicalIF":4.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060162","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

Shear failure behavior and damage evolution mechanism of sandstone under pre-static loading and low-frequency dynamic disturbance 预静载和低频动力扰动作用下砂岩剪切破坏行为及损伤演化机制

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-15 DOI: 10.1016/j.soildyn.2025.109796

Jun Guo , Jiahao Zhang , Guorui Feng , Luyang Yu , Jinwen Bai , Daniel Dias , Xiaoze Wen , Jie Zhang , Liang Zhang

{"title":"Shear failure behavior and damage evolution mechanism of sandstone under pre-static loading and low-frequency dynamic disturbance","authors":"Jun Guo , Jiahao Zhang , Guorui Feng , Luyang Yu , Jinwen Bai , Daniel Dias , Xiaoze Wen , Jie Zhang , Liang Zhang","doi":"10.1016/j.soildyn.2025.109796","DOIUrl":"10.1016/j.soildyn.2025.109796","url":null,"abstract":"<div><div>To investigate shear failure behaviour under disturbance loads, shear tests on sandstone were conducted using low-frequency disturbance loads, combined with acoustic emission (AE) and digital image correlation (DIC) technology. The shear mechanical properties were investigated under varying pre-static load levels and disturbance amplitudes. The results indicated that the crack initiation stress, crack damage stress, and peak stress in sandstone shear decreased as the disturbance load amplitude increased. The impact of the disturbance load on the crack initiation and damage stresses are positively and negatively correlated with the pre-static load level, respectively. Disturbance loading causes a linear decrease in cohesion and a slight increase in the internal friction angle, which together lead to a reduction in shear strength. This highlights the dominant role of cohesion degradation in the mechanical weakening of sandstone under dynamic-static coupled conditions. Shear cracks dominate under constant and disturbance loadings exceeding 70 %. Disturbance loads induced more shear cracks. The b-value increased with the disturbance amplitude, and high-amplitude disturbances promoted small-scale microcracking in sandstone. An increased disturbance amplitude weakened the ability of the specimen to store elastic energy and bearing capacity, whereas an increased pre-static load level enhanced these abilities. We offer insights into the stability analysis of rock masses under dynamic normal low-frequency disturbance.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109796"},"PeriodicalIF":4.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060160","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

Real-time magnitude estimation of large earthquakes utilizing combined strong motion and GPS data 结合强震和GPS数据的大地震实时震级估算

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-15 DOI: 10.1016/j.soildyn.2025.109762

Dingwen Zhang, Xiaoran Fan, Qibo Hu, Chenglong Li, Xinjian Shan, Guohong Zhang

{"title":"Real-time magnitude estimation of large earthquakes utilizing combined strong motion and GPS data","authors":"Dingwen Zhang, Xiaoran Fan, Qibo Hu, Chenglong Li, Xinjian Shan, Guohong Zhang","doi":"10.1016/j.soildyn.2025.109762","DOIUrl":"10.1016/j.soildyn.2025.109762","url":null,"abstract":"<div><div>The rapid and accurate assessment of the earthquake magnitude has long been a focal point for seismologists. Traditional methods, such as <span><math><mrow><msub><mi>τ</mi><mi>c</mi></msub></mrow></math></span> and <em>P</em><sub><em>d</em></sub>, which rely on initial P-wave information for magnitude estimation, often encounter issues of magnitude saturation. In recent years, the development of the <span><math><mrow><msqrt><mrow><mi>E</mi><mi>s</mi></mrow></msqrt></mrow></math></span> method based on strong motion data and the PGD method based on GPS data has provided new solutions to address the saturation problem. In this study, we employ the <span><math><mrow><msqrt><mrow><mi>E</mi><mi>s</mi></mrow></msqrt></mrow></math></span> method in combination with the geodetic PGD method to assess the magnitudes of the California <em>M</em><sub>w</sub> 6.4, <em>M</em><sub>w</sub> 7.1 and the Italy <em>M</em><sub>w</sub> 6.6 earthquakes. In addition, we developed a real-time focal mechanism inversion method based on high-frequency GPS and applied it to the California <em>M</em><sub>w</sub> 7.1 and Japan <em>M</em><sub>w</sub> 9.1 earthquakes. The magnitudes of these earthquakes obtained from individual methods and the composite approach exhibit a commendable concordance with the reported moment magnitudes, demonstrating an average absolute deviation of less than 0.3. Reliable magnitude estimates can be achieved within 60–80 s after the earthquake origin time. Furthermore, the real-time focal mechanism inversion can also provide reliable parameters such as moment magnitude, strike, dip, and rake angle within a short time. Our findings demonstrate that the combined method enhances the robustness of real-time magnitude estimation for early warning of large earthquakes and shows potential for application in tsunami warning systems.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109762"},"PeriodicalIF":4.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060036","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

Response analysis of high-speed railway isolation bridge under near-fault earthquake: refined modeling method of co-simulation and full-bridge shaking table test 高铁隔震桥近断层地震响应分析：联合模拟与全桥振动台试验的精细化建模方法

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-15 DOI: 10.1016/j.soildyn.2025.109807

Binqi Xiao , Biao Wei , Xiaomiao Zhao , Wei Wang , Lin Pang , Lizhong Jiang , Zhixing Yang , Xianglin Zheng , Ruimin Zhang

{"title":"Response analysis of high-speed railway isolation bridge under near-fault earthquake: refined modeling method of co-simulation and full-bridge shaking table test","authors":"Binqi Xiao , Biao Wei , Xiaomiao Zhao , Wei Wang , Lin Pang , Lizhong Jiang , Zhixing Yang , Xianglin Zheng , Ruimin Zhang","doi":"10.1016/j.soildyn.2025.109807","DOIUrl":"10.1016/j.soildyn.2025.109807","url":null,"abstract":"<div><div>In order to explore the response law of typical high-speed railway isolation bridges under near-fault earthquakes, this paper proposes the OpenSees-MATLAB co-simulation modeling method based on Client-Server technology for analysis, and carries out a large-scale full-bridge shaking table test. The co-simulation method provides a new idea for the refined modeling of high-speed railway isolation bridges, which can help researchers introduce the developed refined mechanical model into the bridge system. In this paper, the feasibility and accuracy of the co-simulation calculation are verified by comparing the numerical calculation results with the shaking table test results, and the seismic response law of the high-speed railway isolation bridge is analyzed based on the shaking table test and numerical calculation. The results show that the vertical ground motion component (VH) has a significant and random effect on the seismic response of different components of the high-speed railway isolation bridge with hyperboloid friction pendulum bearing and viscous damper. Based on the probability statistics method, this paper proposes a response error upper bound (<span><math><mrow><mi>R</mi><msub><mi>E</mi><mrow><mi>u</mi><mi>p</mi><mi>p</mi><mi>e</mi><mi>r</mi></mrow></msub></mrow></math></span>) value with a confidence level of 95 % to quantify the influence of VH. The logarithmic regression model proposed in this paper can quickly and accurately predict the <span><math><mrow><mi>R</mi><msub><mi>E</mi><mrow><mi>u</mi><mi>p</mi><mi>p</mi><mi>e</mi><mi>r</mi></mrow></msub></mrow></math></span> of the high-speed railway isolation bridge caused by the VH, which can help to correct the seismic response without considering the VH.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109807"},"PeriodicalIF":4.6,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145060161","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

Cyclic load-displacement behavior of piles via Frustum Confining Vessel 截锥体约束容器桩的循环荷载-位移特性

IF 4.6 2区工程技术

Soil Dynamics and Earthquake Engineering Pub Date : 2025-09-11 DOI: 10.1016/j.soildyn.2025.109795

Mohammad Esmailzade, Abolfazl Eslami

{"title":"Cyclic load-displacement behavior of piles via Frustum Confining Vessel","authors":"Mohammad Esmailzade, Abolfazl Eslami","doi":"10.1016/j.soildyn.2025.109795","DOIUrl":"10.1016/j.soildyn.2025.109795","url":null,"abstract":"<div><div>The load-displacement behavior of piles under cyclic and static loading is largely influenced by geometry. This study evaluates various pile types with differing geometries and installation methods using the Frustum Confining Vessel (FCV). Twenty-one tests were conducted with cyclic amplitudes of 10 % and 30 % of the ultimate bearing capacity. For conventional piles, the 10 % diameter and offset limit methods yielded comparable results, while Brinch Hansen 80 % and Chin-Kondner methods overestimated capacities. For helical piles, the 10 % method was most accurate, with the offset limit method underestimating capacity. Helical piles initially experienced higher settlement under low-amplitude cyclic loading due to soil disturbance but stabilized over time. Under high-amplitude loading, they surpassed conventional piles, showing reduced settlement and greater stability. Conventional piles displayed higher initial stiffness, whereas helical piles exhibited greater post-cyclic stiffness improvements. Helical piles with spacing ratios of 1.5 and 3 achieved stiffness ratios of 2.7 and 2.8, respectively, compared to 2.0 for narrow cylindrical piles. When assessed from geotechnical and practical perspectives (including cost, manufacturability, and cyclic behavior), helical piles demonstrated better performance. The study validated the FCV results through scaling with similarity theory and field comparisons, ensuring the reliability of the experimental findings.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"200 ","pages":"Article 109795"},"PeriodicalIF":4.6,"publicationDate":"2025-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145048874","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