Thin-Walled Structures最新文献_第8页

Enhancement of high-cycle fatigue performance for damaged steel plates through laser cladding repair 激光熔覆修复提高损伤钢板的高周疲劳性能

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-20 DOI: 10.1016/j.tws.2026.114558

Xiang Zhang , Ziyi Wang , Bin Zeng , Chun-Lin Wang

Laser cladding (LC) can be used to repair locally corroded steel components, but the high-cycle fatigue behavior of the repaired structural components remains unclear. Focusing on applications in building steel structures, this study employed LC technology to repair notched steel plates and conducted uniaxial high-cycle fatigue tests under identical fatigue conditions on Q345 substrate specimens, unrepaired notched specimens, and LC-repaired specimens, comparatively analyzing their high-cycle fatigue performance and failure modes and identifying a two-stage stiffness degradation behavior in the repaired specimens. The experimental results indicate that the fatigue strength of LC-repaired specimens reached 167 % of that of unrepaired notched specimens, exceeding 90 % of the substrate specimens (uncorroded specimens). The improvement was particularly significant when the maximum stress was below the yield strength of the substrate. After LC repair, the specimens met the classification requirements for ground butt welds specified in various national standards. Microstructural analysis revealed that the heterogeneous microstructure of the heat-affected zone (HAZ) made it the weak region of the repaired steel plate. The repaired specimens exhibited a continuous gradual reduction in axial stiffness due to damage accumulation within the cladding layer, showing a two-stage stiffness degradation pattern characterized by a slow decline followed by a rapid drop.

激光熔覆（LC）可用于修复局部腐蚀的钢构件，但修复后构件的高周疲劳行为尚不清楚。本研究着眼于在建筑钢结构中的应用，采用LC技术修复缺口钢板，对Q345基板试件、未修复缺口钢板试件和LC修复钢板试件进行相同疲劳条件下的单轴高周疲劳试验，对比分析其高周疲劳性能和破坏模式，确定修复后试件存在两阶段刚度退化行为。试验结果表明，lc修复后试件的疲劳强度达到未修复缺口试件的167%，超过基体试件（未腐蚀试件）的90%。当最大应力低于基体的屈服强度时，这种改善尤为显著。试件经LC修复后，满足国家标准对接地对接焊缝的分类要求。显微组织分析表明，热影响区（HAZ）的非均匀组织使其成为修复钢板的薄弱区域。修复后试件轴向刚度由于熔覆层内部损伤的累积而呈现出连续逐渐降低的趋势，呈现出先缓慢下降后快速下降的两阶段刚度退化模式。

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引用次数: 0

Spherical-based mechanical metamaterials: from prediction to design via machine learning 基于球体的机械超材料：通过机器学习从预测到设计

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-20 DOI: 10.1016/j.tws.2026.114557

Pasquale Posabella , Marcin Heljak , Kamil Majchrowicz , Marco Costantini , Wojciech Święszkowski

Spherical-based porous metamaterials, thanks to their curved architecture minimising stress concentrations, show promising mechanical properties. However, despite such features, their study remains limited, mostly due to difficulties in efficiently architecting their porous layers. To fill this gap, we investigate spherical-based porous architectures to clarify the relationship between their structural and functional properties. First, we develop artificial neural networks (NNs) to link the geometrical architecture of metamaterials to their elastic modulus and/or porosity. Then, an inverse design framework is realised by coupling the developed NNs to genetic algorithms. This strategy allows to efficiently explore the design space and optimise the metamaterial architecture based on specifications on target features. Thanks to the developed tool, it is possible to generate spherical-based metamaterial designs with homogenised normalised elastic modulus

\hat{E}

between 0.060 and 0.226 and porosity Φ between 0.55 and 0.80. Finally, the computational method is validated experimentally using 3D-printed structures. Besides providing an efficient design framework, the main achievement of this study is to clarify the structure-property relationship in architected spherical-based porous structures, showing potential for tailored mechanical performance in various engineering scenarios.

基于球形的多孔超材料，由于其弯曲的结构使应力集中最小化，显示出很好的机械性能。然而，尽管有这些特点，它们的研究仍然有限，主要是由于难以有效地构建它们的多孔层。为了填补这一空白，我们研究了基于球形的多孔结构，以阐明其结构和功能特性之间的关系。首先，我们开发了人工神经网络（nn），将超材料的几何结构与其弹性模量和/或孔隙率联系起来。然后，通过将所开发的神经网络与遗传算法耦合，实现了一个逆设计框架。这种策略可以有效地探索设计空间，并根据目标特征的规格优化超材料体系结构。由于开发的工具，可以生成均匀的归一化弹性模量E^在0.060和0.226之间，孔隙度Φ在0.55和0.80之间的球形超材料设计。最后，利用3d打印结构对计算方法进行了实验验证。除了提供一个有效的设计框架外，本研究的主要成果是阐明了球形多孔结构的结构-性能关系，显示了在各种工程场景中定制力学性能的潜力。

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引用次数: 0

Star-Chiral Honeycomb with robust impact resistance 星形手性蜂窝，具有强大的抗冲击性

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-20 DOI: 10.1016/j.tws.2026.114550

Xiaomeng Guo , Meiqi Wu , Wengang Bu , Pengyu Lv , Xiubing Liang

Lightweight structures capable of mitigating impact loads are important for protecting mechanical and electronic components in vehicles and aircraft. However, traditional energy-absorbing metamaterials often suffer from lateral instability under compression, limiting effective deformation participation. To address this, a new Star-Chiral Honeycomb (SCHH) is proposed. Upon impact, the chiral elements rotate to draw the structure inward, suppressing side misalignment and enhancing global deformation stability. During compression, a transitional configuration forms, producing a distinct secondary plateau stress that significantly improves energy absorption. A theoretical model for the plateau stress is derived to identify dominant parameters governing load-shedding performance, which are further optimized through wall-thickness adjustment—reducing the first-order plateau stress to approximately 78% of that of the SSH structure, while the second-order plateau stress is elevated to about seven times that of the SSH. Compared with the traditional Star-Shaped Honeycomb, the SCHH achieves an 16.2% reduction in peak acceleration and 33.87% and 29.50% increases in energy absorption at impact speeds of 1 m/s and 25 m/s, respectively. The overall deformation remains highly uniform, with all unit cells contributing to energy dissipation. This study provides a novel design concept for tunable, load-shedding, and energy-absorbing metamaterials suited for advanced impact-resistant applications.

能够减轻冲击载荷的轻型结构对于保护车辆和飞机中的机械和电子部件非常重要。然而，传统的吸能材料在压缩下往往存在侧向失稳，限制了有效的变形参与。为了解决这一问题，提出了一种新的星手性蜂窝结构。当受到冲击时，手性元件旋转将结构向内拉，从而抑制了侧面错位，增强了整体变形稳定性。在压缩过程中，过渡性结构形成，产生明显的二次高原应力，显著提高能量吸收。推导了平台应力的理论模型，确定了控制减载性能的主要参数，并通过壁厚调整进一步优化了这些参数，将一阶平台应力降低到SSH结构的约78%，而将二阶平台应力提高到SSH结构的约7倍。与传统的星形蜂窝相比，在冲击速度为1 m/s和25 m/s时，SCHH的峰值加速度降低了16.2%，能量吸收增加了33.87%和29.50%。整体变形保持高度均匀，所有单元格都有助于能量耗散。这项研究为可调谐、减载和吸能的超材料提供了一种新的设计概念，适合于先进的抗冲击应用。

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引用次数: 0

Nonlinear dynamics and control of circular FG-GPLRC piezoelectric and dielectric plates 圆形FG-GPLRC压电和介电板的非线性动力学与控制

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-20 DOI: 10.1016/j.tws.2026.114560

Haorui Ren , Jinghua Zhang

Research on dynamic behaviors provides a theoretical basis for active control, enhancing safety and reliability, and achieving optimal performance-function matching in intelligent composite structures. This study investigates large-deflection nonlinear dynamic responses of circular functionally graded graphene platelets reinforced composite (FG-GPLRC) plates under coupled force-electric fields, particularly considering both the piezoelectric and dielectric effects. Firstly, equivalent material properties of the composites accounting for interfacial imperfections, electron tunneling effects, and Maxwell-Wagner-Silla (MWS) polarization are predicted by the effective medium theory and linear rule of mixtures. Then, the dynamic governing equations are derived on the basis of von Kármán nonlinear theory and piezoelectric constitutive relations, and solved via the Kantorovich time-averaging combined with the shooting method. Finally, the effects of applied electric fields, excitation force and parameters of graphene platelets (GPLs), as well as piezoelectric and dielectric effects on dynamic displacements of the plates are analyzed cross-scale by numerical studies. Results highlight the critical role of a percolation threshold in governing dynamic behaviors. Optimal control parameters, including the applied voltage, volume fraction and distribution patterns of GPLs are proposed to achieve superior dynamic performance, enabling cross-scale active control and intelligent response of the circular FG-GPLRC plates.

动态行为研究为智能复合材料结构的主动控制、提高结构的安全性和可靠性、实现结构性能与功能的最优匹配提供了理论依据。本文研究了圆形功能梯度石墨烯片增强复合材料（FG-GPLRC）板在力电场耦合作用下的大挠度非线性动态响应，特别是考虑了压电效应和介电效应。首先，利用有效介质理论和混合物线性规律预测了复合材料的等效材料性能，包括界面缺陷、电子隧穿效应和MWS极化；然后，基于von Kármán非线性理论和压电本构关系推导了动力控制方程，并采用Kantorovich时间平均法结合射击法进行求解。最后，通过跨尺度的数值研究，分析了外加电场、激励力、石墨烯片参数以及压电和介电效应对石墨烯片动态位移的影响。结果强调了渗透阈值在控制动态行为中的关键作用。提出了最优控制参数，包括施加电压、体积分数和gpl分布模式，以获得优异的动态性能，实现了FG-GPLRC圆形板的跨尺度主动控制和智能响应。

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引用次数: 0

Dynamic modeling and intelligent optimization of vibration suppression for flexible link with ESACLD treatment 基于ESACLD处理的柔性连杆减振动力学建模与智能优化

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-20 DOI: 10.1016/j.tws.2026.114561

Yongbin Guo , Yongxin Zhang , Liang Li , Dingguo Zhang , Wei-Hsin Liao , Chaofan Du , Sijia Chen

Enhanced Segmented Active Constrained Layer Damping (ESACLD) is a novel intelligent damping structure designed to suppress vibrations of flexible structures in engineering fields. With the rapid development of machine learning, optimization algorithms have become a significant approach to finding the optimal solution to complex problems. This article proposes a novel particle swarm optimization algorithm called Evolutionary Cooperative Particle Swarm Optimization (EC-PSO), inspired by human social mechanisms such as division of labor, cooperation, competition, and evolution, significantly improving performance compared to other optimized PSO algorithms. Based on high-order rigid-flexible coupling theory and finite element method, considering edge elements, cutting, a spatial flexible manipulator is modeled as a two-link system with ESACLD hollow circle cross-section beams and flexible joints. And then, EC-PSO algorithm is used to optimize the flexible joint connection position. Finally, the vibration characteristics of this system were simulated and analyzed. The EC-PSO algorithm has high efficiency and robustness in solving complex problems, and its performance is superior to traditional PSO optimization algorithms. The damping performance of ESACLD model is better than that of ACLD model, and the lightweight of flexible joints can greatly improve the vibration suppression performance. When the stiffness of flexible joints is small, it mainly suppresses the first mode. while suppressing the second and third modes when it is large. This study provides an effective framework for the optimization design of space flexible robotic arms and vibration prediction during orbital operation.

增强分段主动约束层阻尼（ESACLD）是一种新型的智能阻尼结构，用于抑制工程领域中柔性结构的振动。随着机器学习的快速发展，优化算法已成为寻找复杂问题最优解的重要途径。本文提出了一种新的粒子群优化算法，即进化合作粒子群优化算法（Evolutionary Cooperative particle swarm optimization, EC-PSO），该算法受人类社会分工、合作、竞争和进化等机制的启发，与其他优化后的粒子群优化算法相比，性能有了显著提高。基于高阶刚柔耦合理论和有限元方法，考虑边缘单元、切割等因素，将空间柔性机械臂建模为具有ESACLD空心圆截面梁和柔性关节的两连杆系统。然后，采用EC-PSO算法对柔性关节连接位置进行优化。最后，对该系统的振动特性进行了仿真分析。EC-PSO算法在求解复杂问题时具有高效率和鲁棒性，性能优于传统的粒子群优化算法。ESACLD模型的阻尼性能优于ACLD模型，柔性关节的轻量化可以大大提高其减振性能。当柔性关节刚度较小时，主要抑制第一模态；而当它较大时则抑制第二和第三模态。该研究为空间柔性机械臂的优化设计和轨道运行振动预测提供了有效的框架。

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引用次数: 0

Topological optimization design on hard coating layer treatment for vibration reduction of thin panel via BESO algorithm 基于BESO算法的薄板减振硬涂层处理拓扑优化设计

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-20 DOI: 10.1016/j.tws.2026.114564

Qingyu Zhu , Zhaodong Fang , Zhaoye Qin , Jinguo Liu , Qingkai Han

In this paper, topology design on hard coating layer treatment for vibration suppression of scientific experiment cabinet panel via BESO technique is proposed. An optimization model is established to minimize the vibration of the hard-coated panel, aiming to maximize the weighted sum of the first four modal loss factors under a constraint on the coating material volume fraction. The BESO technique is employed to optimize hard coating layout, which well aligns with the stress distribution of the panel, verifying the rationality of the optimization design. Comparative analysis with the traditional ESO method demonstrates the superiority of the BESO method in terms of optimization processes, hard coating layouts, and vibration responses. The iterative process of BESO is also visualized to illustrate the evolution of the elements sensitivity and coating distribution. Finally, the BESO-optimized hard coating layout is assessed in terms of natural frequency, modal loss factor, and vibration response. Both numerical and experimental results confirm that the proposed method enables more effective and efficient damping design for thin-walled structures compared to the traditional ESO method.

本文提出了利用BESO技术对科学实验柜面板进行抑振硬涂层处理的拓扑设计。在涂层材料体积分数约束下，以前四个模态损失因子加权和最大为目标，建立了硬涂层板振动最小化优化模型。采用BESO技术对硬质涂层布局进行优化，使其与面板的应力分布吻合较好，验证了优化设计的合理性。通过与传统ESO方法的对比分析，证明了BESO方法在优化工艺、硬涂层布局和振动响应方面的优越性。通过对BESO迭代过程的可视化描述，说明了元素灵敏度和涂层分布的演变过程。最后，根据固有频率、模态损失因子和振动响应对beso优化后的硬涂层布局进行了评估。数值和实验结果均表明，与传统的ESO方法相比，该方法能更有效地实现薄壁结构的阻尼设计。

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引用次数: 0

High-temperature tensile damage evolution of plain-woven SiCf/SiC composites at 1200°C in an inert atmosphere: A 4D in-situ X-ray CT investigation 1200℃惰性气氛下SiCf/SiC复合材料高温拉伸损伤演化：4D原位x射线CT研究

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-19 DOI: 10.1016/j.tws.2026.114555

Chao Chen , Daxu Zhang , Weiyu Guo , Yuefeng Zhang , Yonglong Du , Haixu Zhou , Yi Zhang , Mingming Chen

This study investigates the high-temperature damage evolution of plain-woven SiC_f/SiC ceramic matrix composites under tensile loading. A 4D in-situ X-ray computed tomography (CT) tensile test was conducted at 1200°C in an inert atmosphere. A deep-learning-based damage segmentation network was developed to enable automatic and accurate identification of internal damage. An incremental digital volume correlation (DVC) workflow was established to quantify deformation fields. Damage evolution and failure mechanisms were revealed through three distinct crack-coupled modes, including 0° fibre tow splitting, 90° fibre tow kink-band fracture, and delamination. The results show that the dominant damage modes are matrix cracking and delamination, which initiate, propagate, and coalesce with increasing tensile load. Both exhibit more rapid volumetric growth than at room temperature, particularly delamination, which grows exponentially at 1200°C. Near failure, the crack and delamination volume fractions at high temperature (156.7 MPa) were 1.3 and 29.8 times those at room temperature (240.7 MPa), respectively, and at comparable intermediate loading levels (154.0–157.0 MPa), the ratios could reach up to 8.1 and 98.0, respectively. Damage is strongly correlated with localised strain concentrations, notably at tow-overlap edges. Multiple toughening mechanisms are observed, including interfacial debonding, matrix cracking, delamination, kink-band, fibre fracture, and fibre pull-out.

研究了SiCf/SiC陶瓷基复合材料在拉伸载荷作用下的高温损伤演化规律。在1200°C的惰性气氛中进行了4D原位x射线计算机断层扫描（CT）拉伸试验。为了实现内部损伤的自动准确识别，提出了一种基于深度学习的损伤分割网络。建立了增量数字体积相关（DVC）工作流来量化变形场。通过0°纤维束劈裂、90°纤维束扭结带断裂和分层三种不同的裂纹耦合模式揭示了其损伤演化和破坏机制。结果表明：随着拉伸载荷的增加，基体开裂和脱层损伤是主要的破坏模式，并逐渐形成、扩展和融合；两者都表现出比室温下更快的体积增长，特别是分层，在1200℃时呈指数增长。接近破坏时，高温（156.7 MPa）下的裂纹体积分数和分层体积分数分别是室温（240.7 MPa）下的1.3倍和29.8倍，中等加载水平（154.0 ~ 157.0 MPa）下的裂纹体积分数和分层体积分数分别可达8.1和98.0。损伤与局部应变浓度密切相关，特别是在双重叠边缘。观察到多种增韧机制，包括界面脱粘、基体开裂、分层、扭结带、纤维断裂和纤维拔出。

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引用次数: 0

A mathematical model for thermo-mechanical response of helical wound cables 螺旋缠绕电缆热-机械响应的数学模型

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-19 DOI: 10.1016/j.tws.2026.114556

Haolin Li , Yifan Wang , Zhenkui Wang , Zhen Guo , Jonas W. Ringsberg

Helical wound cables comprising helical wires and cylindrical layers are widely employed in power transmission engineering. During current transmission, the cables typically endure significant thermal loading, which can degrade their mechanical performance and service life. In this study, based on thin rod theory, thick wall theory, and Hertz theory, we propose a theoretical model for thermo-mechanical response of helical wound cables, and analytical solutions are derived to predict both the global mechanical response and the local contact behavior. To validate the theoretical model, three-dimensional (3D) and two-dimensional (2D) finite element (FE) models are constructed. The theoretical predictions are compared with the FE results, demonstrating excellent agreement. Key findings reveal that arranging wires at a critical helix angle minimizes the global mechanical response under thermal load. A temperature rise induces higher interlayer contact pressure, resulting in stress concentrations at the local contact zones. Furthermore, a low helix angle of the wire significantly increases the contact pressure at the wire-insulation interface, while decreasing the contact pressure at the wire-sheath interface. This study contributes to the understanding of mechanical response mechanisms of helical wound cables under thermal load and offers new insights for their optimized design.

螺旋缠绕电缆是由螺旋导线和圆柱层组成的电缆，在电力传输工程中得到了广泛的应用。在电流传输过程中，电缆通常承受较大的热负荷，这会降低其机械性能和使用寿命。本研究基于细杆理论、厚壁理论和赫兹理论，建立了螺旋缠绕电缆热-机械响应的理论模型，并推导出预测整体力学响应和局部接触行为的解析解。为了验证理论模型，构建了三维（3D）和二维（2D）有限元（FE）模型。将理论预测结果与有限元结果进行了比较，结果表明两者吻合良好。关键研究结果表明，在热负荷下，以临界螺旋角排列导线可以最大限度地减少整体机械响应。温度升高导致层间接触压力升高，导致局部接触区应力集中。此外，导线的低螺旋角显著增加了导线-绝缘界面处的接触压力，同时降低了导线-护套界面处的接触压力。该研究有助于理解热载荷作用下螺旋缠绕电缆的力学响应机理，为其优化设计提供新的思路。

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引用次数: 0

Artificial intelligence and optimization technique-driven unified framework for dynamic response analysis and explainable design optimization of sandwich structures 基于人工智能和优化技术的夹层结构动力响应分析与可解释设计优化统一框架

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-18 DOI: 10.1016/j.tws.2026.114500

Jinrui Zhang , Yan Liu , Chao He , Zhenqing Shi , Junbo Yan , Fenglei Huang

The increase in complexity arising from topology design and morphology optimization hinders a deep understanding of the dynamic response of sandwich structures (SSs). Accordingly, a tailored framework of Sandwich Structure Performance Lifecycle Engine (SSPLE) is proposed by integrating eXtreme Gradient Boosting (XGBoost), SHapley Additive exPlanations (SHAP), and Nondominated Sorting Genetic Algorithm II (NSGA-II). To demonstrate its superiority, an SS with three-layer aluminum foam cores is selected as the case study. Firstly, specific energy absorption (SEA) and peak deflection (PD) are employed to characterize the SS’s blast resistance performance, considering the influence of 11 features encompassing geometry, material, bonding, and loading parameters. Subsequently, 600 instances are collected from validated numerical simulations. Employing the trained XGBoost (R² = 0.9443 on the test set) and SHAP, T_top (thickness of the top sheet) is identified as the most influential feature with an effect range from -0.32 kJ·kg⁻¹ to 0.91 kJ·kg⁻¹, and is confirmed to exhibit a substantial interaction effect with SoD (standoff distance) on SEA. As for PD, the main effect of AM (adhesive material) is restricted to the range of -2.35 mm to 7.27 mm following the exclusion of interaction effects. In addition, two optimization strategies provide explainable schemes for performance enhancement, with an increase of 67.39 % in SEA and a decrease of 32.60 % in PD. These findings confirm that the SSPLE can provide a systematic solution for dynamic response analysis and design optimization of SSs. Lastly, a software tool is developed to facilitate the implementation of SSPLE functionalities in practical applications.

拓扑设计和形貌优化带来的复杂性的增加阻碍了对夹层结构动态响应的深入理解。在此基础上，结合极限梯度增强（XGBoost）、SHapley加性解释（SHAP）和非支配排序遗传算法II (NSGA-II)，提出了三明治结构性能生命周期引擎（SSPLE）的定制框架。为说明其优越性，以三层泡沫铝芯的SS为例进行了研究。首先，考虑几何形状、材料、粘结和加载参数等11个特征的影响，采用比能量吸收（SEA）和峰值挠度（PD）来表征SS的抗爆性能。随后，从经过验证的数值模拟中收集了600个实例。利用训练后的XGBoost（在测试集上R2 = 0.9443）和SHAP，确定top（顶片厚度）是影响最大的特征，其影响范围为-0.32 kJ·kg - 1至0.91 kJ·kg - 1，并证实与SoD（距离）对SEA具有显著的交互作用。对于PD，在排除相互作用效应后，AM（粘合剂材料）的主要作用限制在-2.35 mm到7.27 mm的范围内。此外，两种优化策略提供了可解释的性能增强方案，SEA提高了67.39%，PD降低了32.60%。这些结果证实了SSPLE可以为结构的动态响应分析和设计优化提供系统的解决方案。最后，开发了一个软件工具，以方便在实际应用中实现SSPLE功能。

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引用次数: 0

Inspection and capacity prediction of corroded steel bridge girders through 3D scanning, contour mapping, and experimental testing 通过三维扫描、等高线测绘和试验测试对腐蚀钢桥主梁进行检测和承载力预测

IF 6.6 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures

Pub Date : 2026-01-18 DOI: 10.1016/j.tws.2026.114553

A. Provost , G. Tzortzinis , S. Islam , C. Ai , S. Gerasimidis

Steel bridge deterioration presents critical challenges for inspection and load rating, particularly at girder ends where complex corrosion patterns exceed the capabilities of traditional assessment methods. This study establishes a comprehensive framework for digital evaluation through three contributions. First, systematic classification of 553 inspection reports across six New England states confirms regional consistency of corrosion topologies, supporting standardized assessment protocols. Second, a platform-independent methodology transforms terrestrial LiDAR and photogrammetry data into engineering-ready thickness contour maps through resolution-constrained optimization that balances geometric fidelity with computational efficiency. Third, full-scale testing of eight naturally corroded girders validates both scanning methodology and finite element models, achieving 5% average prediction errors for stiffness and capacity while successfully reproducing observed failure modes. Validation of Massachusetts capacity equations using scan-derived parameters demonstrates 5.14% mean prediction errors. The integrated framework enables geometry-informed capacity evaluation that advances beyond discrete measurement approaches, establishing a foundation for implementing digital assessment technologies in bridge engineering practice. The framework supports practical engineering applications including bridge rating, load posting decisions, and prioritization of rehabilitation across large bridge inventories.

钢桥劣化对检查和荷载评定提出了严峻的挑战，特别是在梁端，复杂的腐蚀模式超出了传统评估方法的能力。本研究透过三个贡献，建立一个全面的数位评估架构。首先，对新英格兰6个州的553份检查报告进行了系统分类，确认了腐蚀拓扑结构的区域一致性，支持标准化评估协议。其次，一种独立于平台的方法通过分辨率约束优化，平衡几何保真度和计算效率，将地面激光雷达和摄影测量数据转换为工程准备的厚度等高线地图。第三，对8根自然腐蚀的梁进行全尺寸测试，验证了扫描方法和有限元模型，在成功再现观察到的破坏模式的同时，刚度和容量的平均预测误差达到5%。使用扫描导出的参数验证Massachusetts容量方程的平均预测误差为5.14%。集成框架使几何信息能力评估超越了离散测量方法，为在桥梁工程实践中实施数字评估技术奠定了基础。该框架支持实际工程应用，包括桥梁等级、荷载张贴决策和大型桥梁库存的修复优先级。

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引用次数: 0