Marine Structures最新文献

{"title":"One operational modal parameter identification approach for offshore wind turbine structure resisting low-frequency and high-energy noise interference","authors":"Xiaofeng Dong ,&nbsp;Honghao Peng ,&nbsp;Zekun Shi ,&nbsp;Jijian Lian ,&nbsp;Yang Gao ,&nbsp;Yan Li","doi":"10.1016/j.marstruc.2025.104003","DOIUrl":"10.1016/j.marstruc.2025.104003","url":null,"abstract":"<div><div>Ensuring the operational safety of offshore wind turbine (OWT) structures during their service period requires accurate identification on the operational modal parameters (OMPs), which are not only a crucial parameter which reflect the structure’s vibration characteristics, but also a key index for evaluating the structural healthy status. However, due to the complex and unpredictable ocean environmental circumstances, the measured signals obtained from the actual OWT structures are frequently accompanied by a huge amount of low-frequency, high-energy noise, which has a significant influence on the identification accuracy of OMPs. Therefore, one called CSVS (CEEMDAN-SSA-VMD-SSI) modal identification process, which combined the complete ensemble empirical mode decomposition with adaptive noise (CEEMDAN), sparrow search algorithm (SSA), variational modal decomposition (VMD) and stochastic subspace identification (SSI) method, was proposed for identifying modal parameters of OWT structures under operational conditions. It aims to mitigate the influence on the identification accuracy resulted from the low-frequency, high-energy noise and investigates the variations of modal parameters based on measured data. Firstly, the CEEMDAN method and VMD process optimized by the SSA were used to decompose the signal and remove the low-frequency, high-energy noises, and then the SSI method was following applied to identify and extract the OMPs from the measured data. Secondly, the efficiency of the proposed CSVS approach to identify OMPs of one 3.3 MW OWT operating in Yellow sea of China, was confirmed based on the measured vibration displacement signals under various operational conditions by comparing the results identified from the classic method. Finally, the distribution characteristics of the natural modal frequency, impeller rotation frequency (1P) and blade sweeping frequency (3P) were furtherly investigated, and the change regulations of identified OMPs with the operational factors including wind speed and rotational speed were also provided. It is indicated that the CSVS method shows the strong resistance to modal aliasing and effectiveness on noise reduction compared to the traditional methods so that it can accurately identify and distinguish the natural modal frequency, 1P frequency and 3P frequency of the OWT structure. Further, it may provide the essential technical support for identifying the OMPs and evaluating the operational safety of OWT structures.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104003"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884564","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":"Effects of impact loadings on a submerged floating tunnel: Experimental and numerical investigations","authors":"Tae Hee Lee ,&nbsp;Mujong Kim ,&nbsp;Yena Lee ,&nbsp;Sangmin Lee ,&nbsp;Jung-Wuk Hong","doi":"10.1016/j.marstruc.2026.104015","DOIUrl":"10.1016/j.marstruc.2026.104015","url":null,"abstract":"<div><div>Dynamic responses of a scaled segmental submerged floating tunnel (SFT) subjected to pendulum-type impact loadings are investigated through a combination of experimental tests and numerical simulations. In the experimental program, displacement responses of the moored SFT model were first examined under impacts applied at the upper, central, and lower parts of the tunnel. Additional tests were conducted by releasing the tension in the mooring lines. The scaled tunnel was fixed at the top and subjected to twelve cases combining three different impactor masses with four initial pendulum angles, enabling direct measurement of impact forces. Structural displacements, mooring line tensions, and impact forces were systematically analyzed to evaluate the dynamic behavior of the SFT under various loading conditions. For the numerical modeling of pendulum impact tests, appropriate buoyancy representation and fluid mesh discretization were identified as critical parameters. Different modeling strategies were assessed, and the most effective combination was selected to obtain accurate results. To ensure accurate contact modeling under diverse impact conditions, the penalty scale factor was calibrated by comparing predicted impact forces with experimental measurements. A cubic polynomial relationship between the penalty scale factor and initial impact velocity was established and extended to the full-scale prototype to provide a practical guideline for contact parameter selection. The calibrated numerical model reproduced the observed responses with prediction errors consistently below 7%. A reliable approach for assessing SFT impact behavior is established by the experimental methodology and verified simulation framework presented in this study. These methodologies not only enhance the efficiency of SFT design and safety evaluation but also provide a foundation for impact studies of other submerged buoyant structures.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104015"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976743","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":"Advancing insights into the structural load effects in a semi-submersible floating wind turbine tower considering sum-frequency wave excitation","authors":"Haozhe Bai ,&nbsp;Shuaishuai Wang ,&nbsp;Torgeir Moan ,&nbsp;Shuijin Li ,&nbsp;Kun Xu ,&nbsp;Min Zhang ,&nbsp;Huajun Li","doi":"10.1016/j.marstruc.2025.103992","DOIUrl":"10.1016/j.marstruc.2025.103992","url":null,"abstract":"<div><div>There is a lack of a fundamental understanding of the wave-induced high-frequency (WIHF) dynamic responses in semi-submersible floating wind turbines (FWTs). However, experiments carried out by the Ocean University of China show that sum-frequency wave load effects might have a significant contribution to the extreme loads in the semi-submersible FWT tower. This paper primarily addresses the WIHF dynamic responses under combined wind and wave environmental conditions that may induce extreme tower structural loads relevant for the ultimate limit state (ULS) design check. Ten typical combined wind and wave conditions are determined using the environmental contour method and considerations wind-wave scenario that cause critical tower response. The sectional structural loads of the DTU-10-MW wind turbine mounted on a semi-submersible platform are obtained by a fully coupled time domain dynamic analysis. Two numerical models—a linear (LHM) and a nonlinear hydrodynamic model (NHM)—are developed for analysis. The NHM includes second-order sum-frequency wave excitation and is validated against experiments. Tower structural loads are examined using both models, and the most critical condition is selected for ULS assessment of the tower’s critical section. The study shows that the LHM significantly underestimates high-frequency responses and extreme tower loads, particularly for moderate sea states with wave periods near twice the tower’s first-order bending natural period, as well as for critical ULS conditions (extreme conditions). This highlights the importance of considering sum-frequency wave load effects, and accurately modeling the tower’s natural frequency and structural damping for reliable structural design of semi-submersible FWTs.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103992"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797300","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":"Dynamic response of large-scale offshore wind turbine considering spatiotemporal typhoon impact","authors":"Hao Wang ,&nbsp;Fa Li ,&nbsp;Zhitong Lv ,&nbsp;Shitang Ke ,&nbsp;Bofeng Xu ,&nbsp;Tongguang Wang","doi":"10.1016/j.marstruc.2025.103967","DOIUrl":"10.1016/j.marstruc.2025.103967","url":null,"abstract":"<div><div>Typhoon-induced failures of large offshore wind turbines (LOWTs) remain prevalent, with the uncertainty of typhoon hazards being a central scientific debate. Critical knowledge gaps persist regarding spatiotemporal typhoon impact on LOWTs’ dynamic behavioral features. This study establishes a Typhoon-LOWT analysis framework to investigate typhoon-affected dynamic responses through validated numerical simulations of historically typhoon events, incorporating full-coupled aerodynamic-hydrodynamic-servo-structural modeling. Systematic comparisons were performed between: (i) temporal variations in dynamic responses of the same LOWT and (ii) spatial variations among multiple LOWTs under synchronized typhoon conditions. Key findings reveal that structural response variability (coefficients of variation COV = 0.99 for blade tip displacement, 1.09 for platform sway) substantially exceeds inflow variability (COV=0.59 for hub wind speed), demonstrating the invalidity of linear extrapolation for extreme typhoon condition design. Cross-flow dominance observed under EWA (Eyewall Area)/FES (Front Eyewall Stage)/BES (Back Eyewall Stage) conditions compromises structural safety through fundamentally distinct mechanisms: along-flow responses show inflow insensitivity, whereas cross-flow counterparts exhibit intensity-dependent energy redistribution. The positive feedback loops driven by aero-hydro-structural interaction are identified with fundamental implications for the mitigation of cross-flow vibration. This investigation deciphers differential structural performances among co-located LOWTs during the same typhoon events, identifying cross-flow vibration predominance as a critical safety imperative.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103967"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694711","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":"Multilayer substructure integration calculation method for acoustic radiation of an underwater structure strictly coupled with a floating raft isolator system","authors":"Yi-Ni Yang ,&nbsp;Hao Wang ,&nbsp;Ming-Song Zou ,&nbsp;Ye Liu","doi":"10.1016/j.marstruc.2025.103985","DOIUrl":"10.1016/j.marstruc.2025.103985","url":null,"abstract":"<div><div>This paper presents an efficient method to predict the acoustic radiation of arbitrary underwater structures with a multilayer floating raft isolator system. It breaks through in realizing the strict coupling between the floating raft isolator system, the main hull, and the water. The main structure is separate from the floating raft isolator system and the lower vibration isolator. The fluid-structure coupling effect is considered in the sono-elasticity analysis between the main structure and the water. Modal superposition and simple source boundary integral methods are employed for analyzing fluid-solid coupling vibration and underwater acoustic radiation of the main structure. The floating raft isolator system is modeled as a finite element model and solved by the modal superposition method. By introducing the modal strain energy method, the calculation of the variable damping ratio of different structures can be realized. The multi-degree of freedom mass-stiffness spring system models the upper vibration isolator, whereas the four-terminal parameter method establishes a vibration transmission model of the lower vibration isolator. The coupling between the main structure, floating raft isolator system, and lower vibration isolator is achieved by introducing the virtual mode at the connection boundary. Then, the coupled dynamic equation for the entire underwater structure is obtained. The influence of different excitation directions and isolator parameters on vibration isolation effect is analyzed, which has certain guiding significance for the design of floating raft isolation system. When any component within the floating raft isolator system is modified, only the mass and stiffness matrices of the component need to be re-imported to re-calculate the overall vibration and acoustic response without remodeling the entire structure. This paper discusses the basic principles, computation formulas, and the findings of several numerical examples of the proposed method.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103985"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145694702","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 inverse finite element method for full-field deformation reconstruction of wind turbine towers using one-sided uniaxial strain","authors":"Kai Hong ,&nbsp;Jiazhen Zhan ,&nbsp;Yuhao Guo ,&nbsp;Gang Liu","doi":"10.1016/j.marstruc.2026.104008","DOIUrl":"10.1016/j.marstruc.2026.104008","url":null,"abstract":"<div><div>With the expansion of offshore wind farms into deeper and more remote seas, the operational environment for offshore wind turbine structures is becoming increasingly harsh. Consequently, ensuring the long-term safety of the tower structure—which supports the entire unit—under complex marine conditions is of critical importance. The Inverse Finite Element Method (iFEM) can reconstruct the full-field deformation of the tower structure in real time, thereby providing a crucial guarantee for real-time structural health monitoring. However, the classical iFEM requires the back-to-back installation of triaxial strain sensors on both sides of the element. This significantly increases the complexity and economic cost of sensor deployment. To address this limitation, this paper proposes a One-Sided Uniaxial Strain-based iFEM (OSUS-iFEM). Then, an optimization method for the weighting coefficients utilizing the Multi-Island Genetic Algorithm has been developed to enhance the reconstruction performance. The proposed method significantly reduces the requirements for sensor configuration by reformulating the error functional. Numerical results demonstrate that the OSUS-iFEM supports flexible selection of in-plane strain measurement schemes (uniaxial, biaxial, or triaxial). Compared to the classical iFEM, this approach significantly reduces the number of sensors required (by up to 83.3%) and simplifies installation complexity. Furthermore, the method demonstrates good robustness even with sparse sensor configurations and a coarse mesh. Even in an extremely sparse configuration (using only 24 sensors), the MAE and RMSE remain within 8.5 mm and 9.5 mm, respectively. After optimization, the MAE and RMSE values are consistently maintained below 2.4 mm and 4.1 mm, respectively.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104008"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938755","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":"Fatigue-constrained jacket optimization using Heuristic Particle Elimination Optimization algorithm with catalogue-discrete variables and conical joint modelling","authors":"Afolarinwa David Oyegbile ,&nbsp;Michael Muskulus ,&nbsp;Athanasios Kolios","doi":"10.1016/j.marstruc.2025.104004","DOIUrl":"10.1016/j.marstruc.2025.104004","url":null,"abstract":"<div><div>This article presents a practical framework for minimizing the mass of offshore wind jacket structures under fatigue constraints with fully discrete design variables. The Heuristic Particle Elimination Optimization (HPEO) algorithm is employed to navigate a predefined catalogue of tubular diameters and wall thicknesses, ensuring manufacturable solutions without continuous relaxation or rounding. The framework integrates detailed fatigue verification with catalogue-based discrete sizing and explicit modelling of conical transition joints. The effectiveness of this approach is demonstrated on a jacket support structure for an offshore wind turbine under requirements related to natural frequencies, ultimate strength, and fatigue life. A coupled aero–hydro–servo–elastic model is used to compute the dynamic response under wind and wave loading. Stress concentration factors (SCFs) are obtained using Efthymiou parametric expressions, and hot-spot stresses at eight chord and brace locations are evaluated through superposition of axial, in-plane, and out-of-plane components; additional hot-spot stresses at conical transitions are also included. Fatigue damage is computed using rainflow counting and Miner’s rule. Results show that conical transitions can govern fatigue, highlighting the need to model them explicitly. Refining the design discretization from a coarse model (six pipe families) to a fine model (32 members with explicit cans and stubs) reduced the optimized jacket mass by up to 26.5%, with all natural-frequency, strength, and fatigue constraints still satisfied. Despite large initial particle pools, fewer than 5% in the coarse and <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup><mtext>%</mtext></mrow></math></span> in the fine discretization required full analyses, demonstrating computational savings of several orders of magnitude compared with population-based heuristics. By discarding non-promising candidates early, the HPEO framework converges to optimal or near-optimal designs that satisfy both mass reduction and fatigue life requirements.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104004"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145938800","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":"Hydrodynamic coefficients for an oscillating prototype riser with surface roughness ratio of 1 × 10−5","authors":"Haojie Ren ,&nbsp;Shixiao Fu ,&nbsp;Mengmeng Zhang ,&nbsp;Hao Ren","doi":"10.1016/j.marstruc.2025.103991","DOIUrl":"10.1016/j.marstruc.2025.103991","url":null,"abstract":"<div><div>Vortex-induced vibration (VIV) is a critical factor contributing to the fatigue damage of marine risers, and accurately predicting it is crucial in engineering applications. However, no experimental research has comprehensively studied the influence of the Reynolds number (<em>Re</em>) on the hydrodynamic behavior of oscillating rigid cylinders. In this study, a specialized experimental apparatus is designed and fabricated to conduct forced oscillation tests on the prototype riser model with a roughness ratio of approximately 1 × 10⁻⁵. The <em>Re</em> in these systematic experimental investigations ranges from subcritical to critical regions. Subsequently, we identified and studied the hydrodynamic coefficients of the oscillating rigid cylinder under controlled motions. The experimental results confirmed that the hydrodynamic coefficients derived from experiments at lower <em>Re</em> are inapplicable to prototype risers for empirical VIV prediction theories. By examining the isosurface of the excitation coefficients equal to zero, the potential maximum VIV amplitudes were predicted to reach an unexpected value of 2.5 times the diameter of the cylinder, which is approximately 200 % greater than the conventional values observed at low <em>Re</em>. Furthermore, the slight roughness at a high <em>Re</em> was found to affect the VIV behavior, warranting further investigation in future studies. The findings observed in the present work will serve as important references for predicting hydrodynamic forces and VIV responses of marine risers.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103991"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145797684","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":"Floating solar PV response to wave action","authors":"M. Gomis ,&nbsp;S. Fernández-Ruano ,&nbsp;J.J. Viadero ,&nbsp;R. Guanche ,&nbsp;M. Redon ,&nbsp;M. Sirera ,&nbsp;E. Pons-Puig","doi":"10.1016/j.marstruc.2025.103994","DOIUrl":"10.1016/j.marstruc.2025.103994","url":null,"abstract":"<div><div>In this study, the hydrodynamic behaviour of a floating photovoltaic (FPV) platform designed by ISIGENERE was evaluated through 107 experimental tests conducted in a wave tank at Cantabria Coastal and Ocean Basin (CCOB, IHCantabria). The system, composed of interconnected floating units joined using nylon plates reinforce with fiberglass, was tested under regular and irregular wave conditions to understand the interactions between waves and the floating structure. The results highlight that the dynamic regime of the platform is primarily determined by the wave period. For longer periods, the platform behaves as a wave follower, whereas shorter periods induce higher motion amplitudes of the windward floats because of increased energy dissipation. In terms of wave direction, energy dissipation is most efficient under perpendicular waves (90°). In this study, the mooring system was also assessed, revealing that surge and heave motions dominate its response, with energy concentrated at frequencies matching those of the waves. These findings are critical for optimizing the design of FPV platforms and enhancing their energy dissipation capacity and mooring resilience under various marine conditions. This study provides empirical data and design insights to support the development and global integration of efficient, scalable floating photovoltaic systems.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 103994"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884563","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":"Identification and analysis of the offshore near-fault pulse ground motion and its influence on the seismic response of bridge piers","authors":"Bowei Wang ,&nbsp;Yufei Ye ,&nbsp;Guquan Song ,&nbsp;Baokui Chen ,&nbsp;Xiaoyu Chen ,&nbsp;Sicong Hu","doi":"10.1016/j.marstruc.2026.104013","DOIUrl":"10.1016/j.marstruc.2026.104013","url":null,"abstract":"<div><div>The velocity pulse effect of near-fault offshore does more serious damage to long-period structures like long-span bridges, but due to the lack of offshore stations and strong motion records, there is a lack of identification and characteristics analyses of near-fault pulsed ground motions. Therefore, the offshore ground motion records for epicentral distance within 30 km have been collected from K-NET. The wavelet transform and Hilbert-Huang (HHT) method are used to identify the velocity pulse of offshore near-field ground motions. It is found that the offshore near-field ground motion can include velocity pulse components as the onshore ground motion. The fitting formula for the pulse period and magnitude of offshore near-fault pulse ground motion are then proposed. The spectrum characteristics of offshore near-fault pulse ground motion, offshore near-field non-pulse ground motion and offshore middle-distance ground motion are compared, and the influence of different factors on the near-fault ground motion is analyzed. A shaking table test of the bridge pier was designed and conducted. The offshore near-fault pulse ground motion, offshore near-fault non-pulse ground motion, onshore near-fault pulse ground motion and residual ground motion after eliminated pulse components are used as seismic excitation to analyze the influence of different ground motions on the bridge pier. In this study, the velocity pulse component in the offshore near-fault pulse ground motion is determined. The results show that the velocity response spectrum of offshore near-fault pulse ground motions is obviously greater than that of other types of ground motions, and are affected by factors such as source type and site conditions. Furthermore, the seismic response of the pier is significantly affected by the offshore near-fault pulse ground motion. The results of this study will contribute to improving the seismic risk assessment and seismic design safety of near-fault marine structures.</div></div>","PeriodicalId":49879,"journal":{"name":"Marine Structures","volume":"107 ","pages":"Article 104013"},"PeriodicalIF":5.1,"publicationDate":"2026-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146037323","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}