Soil Dynamics and Earthquake Engineering最新文献_第2页

Quantitative study on the effect of moisture content and external induced load characteristics on the dynamic separation of bauxite 含水率和外部诱导载荷特性对铝土矿动态分离影响的定量研究

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-09 DOI: 10.1016/j.soildyn.2026.110165

Yueyang Sun , Maocheng Huang , Wanqing Wu , Yu Zhou , Heping Wang , Zihao Zhao , Rongchao Zhang , Wenjie Wang , Qinggong Zheng

Moisture content and external induced load, as the main factors affecting cargo fluidization, are often idealized in theoretical and experimental studies, which influences the results of cargo fluidization risk assessment. In this study, we examined the effects of moisture content and external induced load characteristics on the dynamic separation of bauxite by shaking table tests with parallel control groups of different particle size distributions. The coupled effect of external induced load characteristics and moisture content on bauxite dynamic separation was quantified by regression analysis of power function. The results show that increasing load frequency, peak acceleration and moisture content accelerate the onset of dynamic separation. Under higher loading conditions, the delamination is greatly accelerated, allowing for a rapid liquid migration. Concurrently, the depth of the interface between solid and liquid partition increases and its morphology becomes more complex. As moisture content increase, the interface between solid and liquid partition becomes smoother, and the surface height of free liquid increases. The relative impact weights for load frequency, peak acceleration, and moisture content are 47.11, 38.62 and 14.27%, respectively. In addition, the fines content and particle size distribution also affect it. The higher fines content enhances the forces between particles, which promote the formation of cohesive structures and restrict liquid migration and decoupling from particles.

水分含量和外部诱导载荷是影响货物流化的主要因素，在理论和实验研究中往往被理想化，从而影响货物流化风险评估的结果。本文采用不同粒度分布的平行对照组，通过振动台试验研究了含水率和外部诱导载荷特性对铝土矿动态分离的影响。通过幂函数回归分析，量化了外部诱导载荷特性和含水率对铝土矿动态分选的耦合影响。结果表明，加载频率、峰值加速度和含水率的增加会加速动态分离的发生。在较高的载荷条件下，分层大大加速，允许快速的液体迁移。同时，固液分界面的深度增加，其形态也变得更加复杂。随着含水率的增加，固液分界面变得更加光滑，自由液的表面高度增加。载荷频率、峰值加速度和含水率的相对影响权重分别为47.11%、38.62%和14.27%。此外，细粒含量和粒度分布对其也有影响。较高的细粒含量增强了颗粒间的作用力，促进了内聚结构的形成，限制了液体的迁移和与颗粒的解耦。

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引用次数: 0

Evaluation of the effects of embedded depth and earthquake intensity on seismic response of monopile-supported offshore wind turbines through seismic centrifuge tests 通过地震离心试验评价埋深和地震烈度对单桩支撑海上风力发电机组地震反应的影响

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-09 DOI: 10.1016/j.soildyn.2026.110183

Wentao He , Moe Yonehana , Takaaki Kobayashi , Yasuhiro Asaka , Masatoshi Yamazoe , Akihiro Takahashi

The number of Offshore wind turbine (OWT) farms in seismically active regions has been increasing globally as offshore wind development expands. Since earthquake-induced buildup of excess pore water pressure in the foundation ground can cause severe permanent tilting of monopile-supported wind turbines, it is essential to evaluate such an effect on the dynamic performance of the OWTs supported by the monopile foundation. This study investigates the seismic response of the monopile-supported OWTs using a geotechnical centrifuge. Scaled OWT models comprising a monopile foundation and a tower with a mass at the top are prepared. Seismic excitations with different earthquake intensities are applied to the model ground. Monopiles with two slenderness ratios (5 for the long monopile and 3.75 for the short one) are tested to examine the influence of the embedded depth on the seismic response. Acceleration and lateral displacement are recorded to observe the overall deformation of the soil-structure system, and the bending moment distribution of the monopile is also measured. The OWT with the shorter monopile exhibits larger permanent tilting due to its reduced global stability, although the inertial effect of the superstructure is relatively small. Moreover, excess pore water pressure buildup is found to affect the severity of damage. Extensive liquefaction markedly degrades monopile performance, whereas the minor and moderate excess pore water pressure buildup causes a limited impact on the OWT response. Accordingly, increasing embedment into the non-liquefiable layer effectively mitigates the adverse effects. The centrifuge test results are expected to provide valuable benchmarks for validating numerical models and informing design strategies to improve the seismic resilience of monopile-supported offshore wind turbines.

随着海上风电开发的扩大，全球地震活跃地区的海上风力涡轮机（OWT）农场数量不断增加。由于地震引起的地基超孔隙水压力的积累会导致单桩支撑风力发电机组严重的永久倾斜，因此有必要评估这种影响对单桩基础支撑的风力发电机组动力性能的影响。本文采用土工离心机研究了单桩支撑的水轮机的地震反应。编制了单桩基础和顶部有质量的塔的比例OWT模型。在模型地基上施加不同烈度的地震激励。采用两种长细比（长桩为5，短桩为3.75）的单桩进行试验，考察埋深对地震反应的影响。记录加速度和侧向位移，观察土-结构体系的整体变形，并测量单桩的弯矩分布。尽管上层结构的惯性效应相对较小，但单桩较短的OWT由于其整体稳定性降低而表现出较大的永久倾斜。此外，超孔隙水压力的积累也会影响损伤的严重程度。广泛的液化会显著降低单桩的性能，而轻微和中度的超孔隙水压力累积对OWT响应的影响有限。因此，增加对不可液化层的埋入可有效减轻不利影响。离心机试验结果有望为验证数值模型提供有价值的基准，并为提高单桩支撑海上风力涡轮机的抗震能力提供设计策略。

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引用次数: 0

Research on the damping effect of inertial particle absorber on the seismic response of continuous rigid-frame bridge with super high piers 惯性粒子减震器对超高桥墩连续刚构桥地震反应的阻尼作用研究

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-09 DOI: 10.1016/j.soildyn.2026.110176

Zijie Yu , Weibing Xu , Jin Wang , Xiuli Du , Xiaomin Huang , Qingchuang Guo , Keming Pan , Chunjuan Zhou , Dingqing Feng , Cheng Wang

Vibration control technology is an important method to improve the seismic performance and resilience of bridges. At present, there is a lack of effective damping devices for complex bridge structures, such as continuous rigid-frame bridges with super high piers (SCRB). In view of these, this study proposed an inertial particle absorber (IPA). Subsequently, an IPA with optimal design parameters and corresponding 1/20 scale SCRB models were designed and manufactured. Finally, shaking table tests were carried out on the SCRB with and without IPA. And the damping effect of IPA was systematically investigated. The results showed that the introduction of IPA can effectively suppress the high-order modes of SCRB, so that the damage of the SCRB model was mainly concentrated in the plastic hinge area at the pier bottom. Moreover, after the arrangement of IPA, the first three natural frequencies of SCRB were 8.79%, 6.03% and 4.41% higher than those of the original model, respectively. In addition, the IPA can significantly decrease the seismic response of the SCRB with an especially small additional mass ratio (0.26%). The maximum reduction ratio for crack width, number of cracks, acceleration, displacement, and strain can reach 43.75%, 54.41%, 21.99%, 42.99%, and 42.00% respectively. Thus, the IPA can be applied in the vibration control of SCRB under broadband excitations.

振动控制技术是提高桥梁抗震性能和恢复力的重要手段。目前，对于具有超高桥墩的连续刚构桥等复杂桥梁结构，缺乏有效的阻尼装置。鉴于此，本研究提出了一种惯性粒子吸收剂（IPA）。随后，设计并制造了具有最优设计参数的IPA和相应的1/20比例SCRB模型。最后，对含和不含IPA的SCRB进行了振动台试验。并系统地研究了异丙醇的阻尼作用。结果表明：IPA的引入能有效抑制SCRB的高阶模态，使得SCRB模型的损伤主要集中在桥墩底部的塑性铰区域；此外，经过IPA排列后，SCRB的前三个固有频率分别比原模型高8.79%、6.03%和4.41%。此外，在附加质量比较小（0.26%）的情况下，IPA能显著降低SCRB的地震响应。裂纹宽度、裂纹数、加速度、位移和应变的最大折减比分别为43.75%、54.41%、21.99%、42.99%和42.00%。因此，IPA可以应用于SCRB在宽带激励下的振动控制。

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引用次数: 0

Anatomy of geostructural response and failure uncertainty with IAA 用IAA分析地结构响应和破坏不确定性

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-06 DOI: 10.1016/j.soildyn.2026.110162

M. Amin Hariri-Ardebili , Behzad Shakouri , Sissy Nikolaou

This study investigates the maximum dynamic load a geostructure, such as an embankment dam, can withstand under conditions of epistemic uncertainty. The development of “dynamic capacity functions” for such infrastructures has become technically and commercially viable due to advancements in numerical modeling techniques, enhanced hardware capabilities, and successful prior implementations. However, uncertainties in loading conditions and modeling assumptions are often neglected or addressed using empirical models, limiting their reliability. In this paper, a framework based on Intensifying Artificial Acceleration (IAA) is proposed to quantify the uncertainty in response quantities and estimate the failure capacity of a representative geostructure. The IAA methodology expedites the uncertainty quantification process by significantly reducing the computational demand associated with nonlinear transient simulations, offering a practical approach for engineering practitioners. This framework further generates failure fragility curves influenced exclusively by epistemic uncertainties, effectively decoupling them from aleatory uncertainties arising from ground motion record-to-record variability. Such a distinction facilitates the integration of the proposed framework with other studies that primarily address aleatory uncertainty such as performance-based earthquake engineering. Additionally, a series of sensitivity analyses are performed to evaluate the influence of material property variability and water level fluctuations on the response quantities.

本研究探讨了在认知不确定性条件下，土工结构（如堤防大坝）所能承受的最大动力荷载。由于数值建模技术的进步、硬件能力的增强以及先前成功的实现，为这种基础设施开发“动态容量函数”在技术上和商业上都是可行的。然而，加载条件和建模假设中的不确定性往往被忽略或使用经验模型来解决，从而限制了它们的可靠性。本文提出了一种基于强化人工加速度（IAA）的框架来量化响应量的不确定性并估计具有代表性的土工结构的破坏能力。IAA方法通过显著减少与非线性瞬态模拟相关的计算需求，加快了不确定性量化过程，为工程从业者提供了一种实用的方法。该框架进一步生成了仅受认知不确定性影响的失效脆弱性曲线，有效地将其与地面运动记录到记录的可变性引起的随机不确定性解耦。这种区别有助于将所提出的框架与其他主要解决不确定性的研究（如基于性能的地震工程）相结合。此外，还进行了一系列敏感性分析，以评估材料性质变化和水位波动对响应量的影响。

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引用次数: 0

Study on the influence of wide range pre-shear strain and pre-shear direction on the cyclic dynamic characteristics of sand using discrete element method 用离散元法研究大范围预剪应变和预剪方向对砂土循环动力特性的影响

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-05 DOI: 10.1016/j.soildyn.2026.110167

Chenpeng Shen , Dechun Lu , Xiaoli Wang , Xin Zhou

Utilizing the discrete element particle flow software PFC^3D, specimens with pre-shear strains ranging from 0.01% to 5% are prepared through cyclic drainage. The influence of pre-shear strain and direction on the macroscopic and microscopic dynamic characteristics, microstructure evolution, and shear modulus attenuation of sand is analyzed. Results indicate that pre-shear strain limits flow deformation development post-liquefaction. As pre-shear strain increases, the flow sliding behavior in small pre-shear strain specimens transitions to cyclic activity in large pre-shear strain specimens after initial liquefaction. The porosity ratio, redundancy index, and slip ratio exhibit an initial decrease, subsequent increase, and final decrease with increasing pre-shear strain. Analysis of initial liquefaction cycle times and cumulative pore water pressure rates confirms that small pre-shear strains enhance soil liquefaction resistance, whereas medium to large strains reduce it. When cyclic loading opposes the pre-shear direction, specimens exhibit fewer initial liquefaction cycles, accelerated pore water pressure accumulation, faster shear modulus decay, and diminished anti-liquefaction capacity. For small pre-shear strain specimens, maximum normal and tangential contact forces increase with strain, with normal contact forces aligned vertically; in large pre-shear strain specimens, the maximum normal contact force direction deviates approximately 10° from vertical. Larger pre-shear strains correlate with faster shear modulus attenuation. Crucially, the results suggest that fabric anisotropy plays a more influential role than void ratio changes under the examined conditions.

利用离散元颗粒流软件PFC3D，通过循环排水制备预剪应变范围为0.01% ~ 5%的试件。分析了剪切前应变和方向对砂土宏观和细观动态特性、微观结构演化和剪切模量衰减的影响。结果表明，预剪切应变限制了液化后流动变形的发展。初始液化后，随着预剪应变的增大，小预剪应变试件的流动滑动行为转变为大预剪应变试件的循环活动。随着预剪应变的增大，孔隙率、冗余指数和滑移率呈现先减小后增大、最终减小的趋势。对初始液化循环次数和累积孔隙水压力率的分析证实，小的预剪应变增强了土壤的液化阻力，而中应变至大应变则降低了土壤的液化阻力。当循环加载方向与预剪方向相反时，试件的初始液化循环次数减少，孔隙水压力积累加快，剪切模量衰减加快，抗液化能力降低。对于小的预剪应变试样，最大法向接触力和切向接触力随应变增大而增大，且法向接触力垂直排列；在大的预剪应变试样中，最大法向接触力方向偏离垂直方向约10°。更大的预剪应变与更快的剪切模量衰减相关。重要的是，研究结果表明，在实验条件下，织物各向异性比孔隙率变化的影响更大。

{"title":"Study on the influence of wide range pre-shear strain and pre-shear direction on the cyclic dynamic characteristics of sand using discrete element method","authors":"Chenpeng Shen , Dechun Lu , Xiaoli Wang , Xin Zhou","doi":"10.1016/j.soildyn.2026.110167","DOIUrl":"10.1016/j.soildyn.2026.110167","url":null,"abstract":"<div><div>Utilizing the discrete element particle flow software PFC<sup>3D</sup>, specimens with pre-shear strains ranging from 0.01% to 5% are prepared through cyclic drainage. The influence of pre-shear strain and direction on the macroscopic and microscopic dynamic characteristics, microstructure evolution, and shear modulus attenuation of sand is analyzed. Results indicate that pre-shear strain limits flow deformation development post-liquefaction. As pre-shear strain increases, the flow sliding behavior in small pre-shear strain specimens transitions to cyclic activity in large pre-shear strain specimens after initial liquefaction. The porosity ratio, redundancy index, and slip ratio exhibit an initial decrease, subsequent increase, and final decrease with increasing pre-shear strain. Analysis of initial liquefaction cycle times and cumulative pore water pressure rates confirms that small pre-shear strains enhance soil liquefaction resistance, whereas medium to large strains reduce it. When cyclic loading opposes the pre-shear direction, specimens exhibit fewer initial liquefaction cycles, accelerated pore water pressure accumulation, faster shear modulus decay, and diminished anti-liquefaction capacity. For small pre-shear strain specimens, maximum normal and tangential contact forces increase with strain, with normal contact forces aligned vertically; in large pre-shear strain specimens, the maximum normal contact force direction deviates approximately 10° from vertical. Larger pre-shear strains correlate with faster shear modulus attenuation. Crucially, the results suggest that fabric anisotropy plays a more influential role than void ratio changes under the examined conditions.</div></div>","PeriodicalId":49502,"journal":{"name":"Soil Dynamics and Earthquake Engineering","volume":"204 ","pages":"Article 110167"},"PeriodicalIF":4.6,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146174981","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 response and seismic fragility of a well foundation supporting bridge pier when located on flat and sloping grounds 平坡地面上支撑桥墩的井基动力响应及地震易损性研究

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-05 DOI: 10.1016/j.soildyn.2026.110166

Aman Srivastava , Yogendra Singh , Subhamoy Bhattacharya

In the present study, seismic response of a well foundation supporting a bridge pier was evaluated. The foundation was considered on flat and sloping grounds. Non-linear time history analyses (NLTHA) were performed, using a suite of 21 ground motions and 3D finite element analyses. The distribution of earth pressure, design forces, and displacement of the supported superstructure, under seismic loading, was evaluated and compared with the provisions of existing design codes for well foundation. The seismic response of well foundation located on slope was compared with its counterpart on flat ground. The performance of pier and well foundation was quantified in terms of relative displacement and rotation. Using the results of incremental dynamic analysis (IDA), fragility curves were obtained to highlight the effect of slope on seismic response of well foundation. The earth pressure distribution and its value, considered in the existing design provision, were observed to be significantly different from the actual earth pressure under application of seismic excitation, for well foundation on flat ground and on slopes.

本文对某桥梁桥墩井基础的地震反应进行了评价。地基被认为是在平坦和倾斜的地面上。非线性时程分析（NLTHA）使用了一套21个地面运动和三维有限元分析。对地震荷载作用下受支撑上部结构的土压力、设计力和位移的分布进行了评估，并与现有井基础设计规范的规定进行了比较。比较了边坡井基础与平地井基础的地震反应。通过相对位移和旋转对桥墩和井底的性能进行了量化。利用增量动力分析（IDA）的结果，得到井底易损性曲线，以突出边坡对井底地震反应的影响。我们观察到，在地震激励作用下，平地井基础和斜坡井基础的土压力分布及其值与实际土压力存在显著差异。

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引用次数: 0

Design and performance evaluation of tie-down cables for mitigating seismic uplift in cable-stayed bridges 斜拉桥减震拉索设计与性能评价

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-05 DOI: 10.1016/j.soildyn.2026.110156

Yufeng Li , De'en Yu , Jiang Yi

Earthquake-induced bearing uplift constitutes a common seismic damage mode in cable-stayed bridges. While tie-down cables serve as a common mitigation measure, their design must reconcile the need to accommodate large horizontal deck displacements with providing vertical restraint, resulting in complex bidirectional interactions. Building upon existing mechanistic research, this study develops a practical seismic design framework for tie-down cables. The core of the framework is a structured design process, including analysis of seismic requirements, determination of design parameters and verification methods, and evaluation of secondary effects on substructures. The effectiveness of this methodology is rigorously validated through a comprehensive case study employing nonlinear time-history and incremental dynamic analyses. Results demonstrate that the designed tie-down system effectively controls uplift under design-level seismic intensities. A key finding shows that the vertical component of the cable force can increase bearing forces by up to 50 %, necessitating corresponding capacity verification. Furthermore, the control effectiveness diminishes rapidly beyond the design level due to potential cable fracture. This study provides a rational design methods for cable-stayed bridge seismic design, facilitating the translation of research findings into engineering practice.

地震引起的支座隆升是斜拉桥常见的地震破坏形式。虽然捆绑电缆是一种常见的缓解措施，但它们的设计必须兼顾甲板水平位移和垂直约束的需求，从而导致复杂的双向相互作用。在现有力学研究的基础上，本研究开发了一种实用的系扎电缆抗震设计框架。框架的核心是一个结构化的设计过程，包括抗震要求的分析、设计参数和验证方法的确定以及对子结构的二次影响的评估。通过采用非线性时程和增量动态分析的综合案例研究，严格验证了该方法的有效性。结果表明，在设计烈度下，设计的锚固体系能有效控制上部隆起。一个关键的发现表明，索力的垂直分量可以增加高达50%的承载力，需要相应的能力验证。此外，由于潜在的索断裂，控制效果在设计水平之外迅速下降。本研究为斜拉桥抗震设计提供了合理的设计方法，便于将研究成果转化为工程实践。

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引用次数: 0

A multiple tuned mass damper strategy for vibration control of monopile supported offshore wind turbines under seismic excitation 基于多调谐质量阻尼器的单桩海上风力发电机组地震振动控制策略

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-05 DOI: 10.1016/j.soildyn.2026.110158

Ling-Yu Xu , Shi-Yi Qian , Yuan Gao , Guo-Xing Chen , Fei Cai , Wei-Yun Chen

The rapidly expanding fleet of offshore wind turbines (OWTs) faces seismic risks. Earthquakes can excite high-frequency structural modes that typically remain dormant under normal wind and wave loads. This study proposes a vibration control strategy (4-MTMD) using multiple tuned mass dampers targeted at the structure's first four bending modes. A 3D finite element model incorporating pile–soil interaction is presented for a 5 MW monopile-supported OWT. The effectiveness of the proposed 4-MTMD strategy is systematically evaluated and compared against conventional tuned mass dampers tuned to the first bending mode (1-TMD) and the first two bending modes (2-MTMD) under seismic excitations with different frequency characteristics. Key findings indicate that high-frequency excitations can activate the third and fourth bending modes, with peak horizontal accelerations occurring in the middle-upper tower section. The 4-MTMD strategy demonstrates superior overall performance, effectively controlling horizontal accelerations across all frequency ranges, particularly under high-frequency earthquakes. Although the 1-TMD strategy provides the best control for tower-top displacement under certain conditions, the 4-MTMD strategy offers more comprehensive displacement reduction along the entire tower height. Crucially, even for excitations containing frequencies beyond the fifth bending mode frequency, the OWT tower response remains dominated by the first four modes. Therefore, designing MTMD systems to control up to the fourth bending mode represents an effective and sufficient strategy for strengthening seismic resilience of OWTs.

快速扩张的海上风力涡轮机（OWTs）面临着地震风险。地震可以激发高频结构模式，这些模式通常在正常的风和波荷载下保持休眠状态。本研究提出了一种针对结构的前四种弯曲模态使用多重调谐质量阻尼器的振动控制策略（4-MTMD）。建立了考虑桩土相互作用的5mw单桩支撑水轮机的三维有限元模型。系统地评价了4-MTMD策略的有效性，并与传统调谐质量阻尼器在不同频率特性的地震激励下调谐到第一弯曲模态（1-TMD）和前两弯曲模态（2-MTMD）进行了比较。研究结果表明，高频激励可以激活第三和第四种弯曲模式，水平加速度峰值出现在塔中上部。4-MTMD策略展示了卓越的整体性能，有效地控制了所有频率范围内的水平加速度，特别是在高频地震下。虽然在一定条件下，1-TMD策略对塔顶位移的控制效果最好，但4-MTMD策略在整个塔顶高度上的位移减小效果更全面。至关重要的是，即使对于包含频率超过第五次弯曲模态频率的激励，OWT塔的响应仍然由前四种模态主导。因此，设计MTMD系统来控制第四次弯曲模态是增强owt抗震能力的有效和充分的策略。

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引用次数: 0

Marine geotechnical investigation and soil testing for suction anchor foundation of floating wind turbines in the South China Sea 南海浮式风力发电机组吸力锚基础海洋岩土调查与土试

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-05 DOI: 10.1016/j.soildyn.2026.110164

Chencong Liao , Liheng Tang , Yuanxi Li , Guanlin Ye

As offshore wind energy development progresses into deeper waters, the challenges associated with geotechnical investigations have become increasingly pronounced. This is primarily driven by the expansion of project scope, the stringency of time constraints, and the growing demand for high-precision, reliable site data. This paper uses the world's largest single-unit offshore floating wind turbine, OCEAN X, as a case study to outline the geotechnical investigations and soil parameter testing required for the foundation design. This study examines the methodologies for obtaining marine sediments parameters and addresses critical issues related to site investigations for deep-sea floating wind turbines. Firstly, a recommended protocol was proposed to streamline geotechnical investigations by eliminating redundant testing and data collection to enhancing overall efficiency and adaptability to the growing scale of deep water wind farms. Additionally, the study emphasizes the necessity of high-precision sampling methods at critical locations to mitigate sampling disturbance and secure reliable, representative geotechnical data, especially for highly structured soils. Finally, the practical application of geotechnical parameters in cyclic foundation design is discussed, incorporating consistency verification between in-situ and laboratory-derived data to ensure parameter reliability, along with suggestions for adapting testing methods to better reflect marine sediment behaviour. Together, these insights offer practical basis and valuable guidance for optimizing geotechnical investigation procedures and contribute to the development of more durable and sustainable foundations for floating wind turbines subjected to marine cyclic loadings.

随着海上风能开发向更深的水域发展，与岩土工程调查相关的挑战变得越来越明显。这主要是由于项目范围的扩大，时间限制的严格性，以及对高精度，可靠的站点数据日益增长的需求。本文以世界上最大的单单元海上浮动风力涡轮机OCEAN X为例，概述了基础设计所需的岩土工程调查和土壤参数测试。本研究探讨了获取海洋沉积物参数的方法，并解决了与深海浮式风力涡轮机现场调查相关的关键问题。首先，提出了一种推荐方案，通过消除冗余的测试和数据收集来简化岩土工程调查，以提高整体效率和对不断增长的深水风电场规模的适应性。此外，该研究强调了在关键位置采用高精度采样方法的必要性，以减轻采样干扰，并确保可靠的、具有代表性的岩土工程数据，特别是对于高度结构化的土壤。最后，讨论了岩土参数在循环基础设计中的实际应用，结合现场和实验室导出数据的一致性验证以确保参数的可靠性，并提出了调整测试方法以更好地反映海洋沉积物行为的建议。总之，这些见解为优化岩土工程调查程序提供了实践基础和有价值的指导，并有助于开发更耐用和可持续的浮式风力涡轮机基础，使其承受海洋循环载荷。

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引用次数: 0

Experimental and seismic performance study of composite window-type viscoelastic dampers 复合窗型粘弹性阻尼器的试验与抗震性能研究

IF 4.6 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering

Pub Date : 2026-02-05 DOI: 10.1016/j.soildyn.2026.110163

Haonan Zhan , Wenfu He , Hongbao Yu , Hao Xu

Conventional viscoelastic dampers face limitations in installation flexibility, architectural integration, and maintenance costs. To address these challenges, this study introduces a novel Composite Window-type Viscoelastic Damper (CWVED) with a window-integrated design to enhance energy dissipation and structural adaptability. The force–displacement relationship of the CWVED is derived analytically, and its hysteretic energy dissipation capacity is verified through full-scale experimental testing. A calibrated finite element model is used to assess the effects of shear material properties and geometric configurations. Parametric results show that increasing the lead core diameter from 15 mm to 75 mm boosts equivalent stiffness by up to 77.95% and the equivalent damping ratio by over 140%, while adding lead cores from 1 to 5 further increases them by about 65% and 101.8%, respectively. Optimizing shear height from 100 mm to 300 mm can raise stiffness by over 200% with slight reductions in damping, while adjusting aspect ratio, opening ratio, and laminated layers balances stiffness and energy dissipation, with potential stiffness increases of over 300%. Nonlinear time-history analysis confirms that the Four-point Composite Window-type Viscoelastic Damper (FCWVED) significantly reduces inter-story drift and base shear, outperforming the Four-point Window-type Viscoelastic Damper (FWVED) while maintaining structural integrity under seismic loading.

传统的粘弹性阻尼器在安装灵活性、结构集成和维护成本方面存在局限性。为了解决这些挑战，本研究引入了一种新型的复合窗型粘弹性阻尼器（CWVED），该阻尼器采用窗集成设计，以提高能量耗散和结构适应性。解析推导了CWVED的力-位移关系，并通过全尺寸试验验证了其滞回耗能能力。采用校正后的有限元模型来评估剪切材料性能和几何构型的影响。参数化结果表明，将导联芯径从15 mm增加到75 mm，等效刚度提高了77.95%，等效阻尼比提高了140%以上，而将导联芯径从1增加到5，等效刚度比分别提高了约65%和101.8%。将剪切高度从100 mm优化到300 mm，可以使刚度提高200%以上，同时阻尼略有减少，而调整长径比、开度比和层压层数可以平衡刚度和耗能，潜在刚度增加超过300%。非线性时程分析证实，四点复合窗型粘弹性阻尼器（FCWVED）显著降低了层间漂移和基底剪切，在地震荷载作用下保持结构完整性的同时，性能优于四点窗型粘弹性阻尼器（FWVED）。

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引用次数: 0