【新文速递】2026年4月17日固体力学SCI期刊最新文章

今日更新：International Journal of Solids and Structures 2 篇，Journal of the Mechanics and Physics of Solids 2 篇，Mechanics of Materials 1 篇，Thin-Walled Structures 6 篇

International Journal of Solids and Structures

Elastodynamic pinhole diffraction by finite interfaces: A semi-an alytical framework for directional beaming and inverse source localization

Fuqing Chu, Hui Qi, Shangqi Yuan, Haikun Chen, Jing Guo

doi:10.1016/j.ijsolstr.2026.114011

有限界面弹性动力针孔衍射：定向光束和逆源定位的半解析框架

This study develops a semi-an alytical solution for the scattering of shear horizontal (SH) waves by two elastic half-spaces connected through a finite interface. The resulting mixed boundary value problem is resolved using a domain decomposition strategy and Fourier-Bessel wave function expansions. By strictly enforcing displacement and traction continuity across the interface, the expansion coefficients are determined and subsequently validated against independent finite element simulations. Physical an alysis demonstrates that the finite interface functions as an elastodynamic an alogue to an optical pinhole. The spatial profile of the trans mitted beam is governed by the interplay between low-frequency diffraction and high-frequency near-field interference, yielding an optimal dimensionless frequency that minimizes beam divergence. Based on this directional trans mission, an inverse localization scheme is formulated to identify unknown wave sources in the upper half-space using exclusively trans mitted field data. Computational results confirm that the source coordinates are effectively retrieved via peak tracking, provided the incidence configuration avoids extreme grazing angles where edge diffraction induces systematic deflection. This work establishes a theoretical basis for utilizing finite interface scattering as a mechanis m for inverse source characterization.

本文研究了剪切水平波通过有限界面连接的两个弹性半空间散射的半解析解。利用区域分解策略和傅里叶-贝塞尔波函数展开解决了混合边值问题。通过严格执行位移和牵引力在界面上的连续性，可以确定膨胀系数，并随后通过独立的有限元模拟进行验证。物理分析表明，有限界面的作用类似于光针孔的弹性动力学模拟。发射光束的空间轮廓由低频衍射和高频近场干涉之间的相互作用决定，产生最佳的无量纲频率，使光束发散最小化。在此方向传输的基础上，制定了一种利用专用传输场数据识别上半空间未知波源的逆定位方案。计算结果证实，如果入射配置避免了边缘衍射引起系统偏转的极端掠掠角，则通过峰值跟踪可以有效地获取源坐标。这项工作为利用有限界面散射作为源逆表征机制奠定了理论基础。

Nonlinear magneto-mechanical responses of hard-magnetic soft beams incorporating shear effects

Mingqi Lu

doi:10.1016/j.ijsolstr.2026.114005

考虑剪切效应的硬磁软梁的非线性磁力响应

Large deformation characteristics of hard-magnetic soft beams determine that the structural an alysis of the beams subjected to applied magnetic fields is essentially a geometrically nonlinear issue based on the hyperelastic materials. The extent to which shear effects affect the deformation performance of hard-magnetic soft beams is a topic of significant interest within the engineering community. To clarify and calculate the structural responses of the beams more accurately, a theoretical model considering shear effects is proposed. The equilibrium equations of hard-magnetic soft beams incorporating shear effects are derived according to the principle of minimum potential energy. A new iterative algorithm is proposed to obtain the solution of the equilibrium equations. By comparing with the existing experimental and theoretical data, the model is well validated. On this basis, the deformation behaviors of hard-magnetic soft beams under applied magnetic fields are an alyzed. From the calculation results, it can be concluded that when the dimensionless quantity M is large and the aspect ratio is s mall, considering shear effects results in the larger dimensionless lateral displacement at the free end of the beam, relative to neglecting shear effects. The shear effects cannot be neglected for the various direction angles of the applied magnetic field α , except α = 180 ° . As for the tangential angle ϕ end at the free end of the beam, shear effects display little influence for different aspect ratios or direction angles of the applied magnetic field.

硬磁软梁的大变形特性决定了外加磁场作用下梁的结构分析本质上是一个基于超弹性材料的几何非线性问题。剪切效应在多大程度上影响硬磁软梁的变形性能是工程界非常感兴趣的话题。为了更准确地阐明和计算梁的结构响应，提出了考虑剪切效应的理论模型。根据最小势能原理，导出了考虑剪切效应的硬磁软梁的平衡方程。提出了一种新的求解平衡方程的迭代算法。通过与已有实验和理论数据的比较，验证了模型的有效性。在此基础上，分析了外加磁场作用下硬磁软梁的变形行为。从计算结果可以看出，当无量纲量M较大，宽高比较小时，考虑剪切效应相对于忽略剪切效应，梁自由端无量纲侧向位移更大。除α = 180°外，外加磁场各方向角的剪切效应都不容忽视。对于束自由端切向角φ端，剪切效应对外加磁场不同宽高比或方向角的影响不大。

Journal of the Mechanics and Physics of Solids

Data-Driven material identification in heterogeneous viscoelastic media

Hossein Salahshoor, Michael Ortiz, Laurent Stainier

doi:10.1016/j.jmps.2026.106635

数据驱动的非均质粘弹性介质材料识别

Full-field material characterization techniques are increasingly improving and new techniques are emerging, providing us altogether with unprecedented access to kinematic measurements. Extracting material properties from data has been a long quest, with the challenge lying at extricating homogeneity in inference and enabling extraction of spatially-varying mechanical properties. We propose a data-driven approach here that enables identifying heterogeneous properties of linear media, either elastic or viscoelastic. We reformulate the identification problem to that of identifying a set in a phase space of possible stresses and strains and employ a hyper-plane data clustering approach algorithm to infer the pointwise material set.

全场材料表征技术日益完善，新技术不断涌现，为我们提供了前所未有的运动学测量途径。从数据中提取材料属性是一个长期的任务，其挑战在于提取推理中的同质性，并能够提取空间变化的力学属性。我们在这里提出了一种数据驱动的方法，可以识别线性介质的异质性，无论是弹性的还是粘弹性的。我们将识别问题重新表述为在可能的应力和应变相空间中识别集 合的问题，并采用超平面数据聚类方法算法来推断点向材料集。

The mechanics and physics of tofu: understanding hydrated soft solids through feature networks

Birte Boes, Jaan-Willem Simon, Hagen Holthusen, Ellen Kuhl

doi:10.1016/j.jmps.2026.106632

豆腐的力学和物理：通过特征网络理解水合软固体

Tofu remains one of the world’s most important plant-based foods, famous for its cultural legacy, nutritional benefits, and environmental sustainability. Made up of only two ingredient–soy beans and water–it has nourished people for centuries; yet, its rheology remains incompletely understood. Here, we use tofu as a minimal model system to study how composition governs the mechanics and physics of hydrated soft solids. We perform over a hundred controlled compression tests on silken, firm, and extrafirm tofu, and observe a strong nonlinearity, a pronounced viscoelasticy, and a more than ten-fold increase in stress with only six percent decrease in water content. We demonstrate that automated model discovery can identify inelastic constitutive laws that accurately capture these unique characteristics across multiple loading magnitudes and rates. The discovered models autonomously separate elastic and inelastic mechanis ms and reveal that tofu elasticity depends primarily on the second isochoric invariant, while tofu inelasticity depends on a combination of the second and third deviatoric invariants. This functional form is universal across all three tofu types, but scales in magnitude with water content. Our new water-content-based feature network reveals that this correlation in not linear, as assumed by traditional bi-phasic theories, but rather highly non-linear and sensitive to the individual model terms. These results position tofu as a quantitative benchmark for nonlinear poroviscoelastic solids and demonstrate how physics-informed machine learning can uncover the constitutive structure of hydrated soft materials. Our source code and examples are available at https://doi.org/10.5281/zenodo.16993236.

豆腐仍然是世界上最重要的植物性食品之一，以其文化遗产、营养价值和环境可持续性而闻名。它只由两种成分组成——大豆和水——几个世纪以来一直滋养着人们；然而，它的流变性仍不完全清楚。在这里，我们使用豆腐作为最小模型系统来研究成分如何支配水合软固体的力学和物理。我们对蚕丝、硬豆腐和超硬豆腐进行了一百多次控制压缩测试，观察到强烈的非线性、明显的粘弹性和十倍以上的应力增加，而含水量只减少了6%。我们证明，自动模型发现可以识别非弹性本构律，准确地捕捉这些独特的特征跨越多个加载幅度和速率。所发现的模型自主地分离了弹性和非弹性机制，并表明豆腐的弹性主要取决于第二个等时不变量，而豆腐的非弹性取决于第二个和第三个偏差不变量的组合。这种功能形式在所有三种豆腐中都是普遍存在的，但其大小与含水量有关。我们新的基于含水量的特征网络揭示了这种相关性不是线性的，正如传统的双相理论所假设的那样，而是高度非线性的，对单个模型项很敏感。这些结果将豆腐定位为非线性多孔粘弹性固体的定量基准，并展示了物理知识的机器学习如何揭示水合软材料的本构结构。我们的源代码和示例可从https://doi.org/10.5281/zenodo.16993236获得。

Mechanics of Materials

Partitioning Viscous and Damage Contributions to Energy Dissipation in Filled Rubbers: Influence of loading, crosslink density, strain rate and filler content

Andréas Hottin, Moussa Naït Abdelaziz, Abderrahim Talha, Matthew Dillon

doi:10.1016/j.mechmat.2026.105703

加载、交联密度、应变率和填料含量对填充橡胶能量耗散的影响

Rubber materials dissipate mechanical energy through viscous effects, damage and microstructural rearrangements. However, the quantitative separation of these contributions remains challenging and most approaches rely on global indicators that do not distinguish between underlying mechanis ms. This work introduces a simple and robust experimental protocol to decompose the total dissipated energy into viscous and microstructural-related components within a consistent thermodynamic framework. The methodology combines cyclic loading tests, surface temperature measurements and fatigue life data an alysis enabling the identification of the respective contributions of each mechanis m. The approach is applied to six carbon black-filled rubber compounds based on crystallizing (NR) and non-crystallizing (SBR) matrices across different material formulations and loading conditions. Key findings reveal that damage progressively becomes the dominant dissipation mechanis m as loading intensity increases, although viscous dissipation remains non-negligible. Under very low mechanical loads, dissipation is almost entirely viscous, which allows the direct identification of a fatigue endurance limit through this protocol. Moreover, torsional loading paths enhance non-damaging structural dissipation over viscous effects due to the continuous changes in loading direction.

橡胶材料通过粘滞效应、损伤和微观结构重排来耗散机械能。然而，这些贡献的定量分离仍然具有挑战性，大多数方法依赖于不区分潜在机制的全球指标。本工作引入了一个简单而稳健的实验方案，在一致的热力学框架内将总耗散能量分解为粘性和微观结构相关的组件。该方法结合了循环加载试验、表面温度测量和疲劳寿命数据分析，从而确定了每种机制各自的贡献。该方法应用于六种基于结晶（NR）和非结晶（SBR）基质的炭黑填充橡胶化合物，跨越不同的材料配方和加载条件。主要研究结果表明，随着加载强度的增加，损伤逐渐成为主要的耗散机制，尽管粘性耗散仍然不可忽略。在非常低的机械载荷下，耗散几乎完全是粘性的，这使得通过该协议可以直接识别疲劳耐力极限。此外，由于加载方向的连续变化，扭转加载路径增强了对粘性效应的非破坏性结构耗散。

Thin-Walled Structures

Semi-an alytical solutions for free vibration an alysis of arbitrarily shaped plates

Dezhuang PAN, Yufeng XING

doi:10.1016/j.tws.2026.114989

任意形板自由振动分析的半解析解

Using the closed-form natural mode functions of rectangular plates as Ritz basis functions, this work presents a semi-a nalytical solution method for the free vibration an alysis of arbitrarily shaped plates with stiffeners and cutouts. In the present method, the plates are approximated by the Kirchhoff plate theory, the stiffeners are modeled by a curvilinear beam theory, and the cutouts are considered as removing energy stored in cutout domain. The arbitrarily shaped plate (physical plate) is built in a rectangular plate (background plate) that covers the physical plate, retaining the energy of the physical plate and removing the residual energy of the background plate. The closed-form natural mode functions of the background plate are used as basis functions. The closed-form natural modes are obtained by the iterative Separation-Of-Variable (iSOV) method, and an effective procedure to make use of the iSOV method is presented to obtain the natural modes as many as acquired. The present method decomposes the arbitrarily shaped plate into several curvilinear triangular and quadrilateral patches, and transforms each patches into a standard square domain using the blending function method, where the integration of energy functional is performed by Gauss quadrature. To validate the present method, comprehensive comparisons of the present results with those of commercial software and available literature are presented, revealing that the present method using fewer basis functions can achieve accurate natural modes, even higher modes, attributing to the superiority of the present novel basis functions. The present basis function derived from rectangular plates can be viewed as a natural extension and improvement of the beam functions widely used in Ritz method.

本文采用矩形板的闭型固有模态函数作为里兹基函数，提出了带加筋和开孔的任意形状板自由振动分析的半解析解方法。该方法采用Kirchhoff板理论对板进行近似，采用曲线梁理论对加强筋进行建模，将切口视为在切口域中存储的能量的去除。任意形状的板（物理板）建在覆盖物理板的矩形板（背景板）内，保留物理板的能量，去除背景板的剩余能量。背景板的封闭型自然模态函数作为基函数。利用迭代变量分离（iSOV）方法获得了封闭型的自然模态，并给出了利用iSOV方法获得尽可能多的自然模态的有效步骤。该方法将任意形状的板分解成若干个曲线三角形和四边形块，并利用混合函数法将每个块转换成一个标准的方形域，其中能量泛函数的积分采用高斯正交法进行。为了验证本方法，将本方法与商业软件和现有文献的结果进行了综合比较，表明本方法使用较少的基函数可以获得准确的自然模态，甚至更高的模态，这是由于本新基函数的优越性。由矩形板导出的基函数可以看作是对里兹法中广泛使用的梁函数的自然扩展和改进。

Experimental and numerical study on perforated 6061-T6 aluminium alloy H-section beams under patch loading

Yecheng Dai, Yuanqing Wang, Huan Lu, Beibei Li, Mingze Wu, Shuai Mo

doi:10.1016/j.tws.2026.114988

贴片荷载作用下6061-T6铝合金h型梁的试验与数值研究

The application of aluminium alloy sections in structural engineering is increasingly recognised for their potential to offer sustainable solutions. This paper presents an experimental and numerical investigation conducted on 6061-T6 aluminium alloy H-section beams with web openings under patch loading. A total of 7 new patch loading tests were carried out on perforated 6061-T6 aluminium alloy H-section beams with different opening size, web thickness and bearing length. Non-linear elasto-plastic finite element (FE) models were developed and validated against the experimental test results. A thorough parametric study comprising 1225 FE models was undertaken to investigate the influence of critical design parameters on patch loading resistance. The parameters examined included opening ratio, web slenderness and bearing length ratio. An increase in opening ratio from 0 to 0.7 resulted in a reduction in patch loading resistance of approximately 40.3% on average. The findings were subsequently compared with the design patch loading resistances as outlined in EN 1999-1-1 (2023) and ADM (2020). The existing design standards provide conservative predictions when compared with experimental and FE results. Finally, resistance reduction factors were proposed, and a reliability an alysis was conducted to assess the feasibility of the proposed reduction factors.

铝合金型材在结构工程中的应用因其提供可持续解决方案的潜力而日益得到认可。本文对带腹板开口的6061-T6铝合金h型梁在配块荷载作用下进行了试验和数值研究。对不同开孔尺寸、腹板厚度和支座长度的6061-T6铝合金h型梁进行了7项新的补片加载试验。建立了非线性弹塑性有限元模型，并与试验结果进行了对比验证。采用1225个有限元模型进行了全面的参数化研究，以研究关键设计参数对贴片加载阻力的影响。考察的参数包括开口比、腹板长细比和轴承长比。打开比从0增加到0.7，导致贴片加载阻力平均降低约40.3%。随后将研究结果与EN 1999-1-1（2023）和ADM（2020）中概述的设计贴片加载阻力进行比较。与实验和有限元结果相比，现有的设计标准提供了保守的预测。最后，提出了阻力折减因子，并进行了可靠性分析，以评估所提出的折减因子的可行性。

Strain-rate dependence of impact behaviour in carbon fibre composites

Bin Yang, Aonan Li, Jiang Wu, Zeeshan Qaiser, Kunkun Fu, Dongmin Yang

doi:10.1016/j.tws.2026.114986

碳纤维复合材料冲击性能的应变速率依赖性

The dynamic responses of carbon fibre reinforced polymer (CFRP) composites under impact loading are critical for structural applications; however, existing models inadequately capture strain rate-dependent damage mechanis ms across different impact velocity regimes. This study develops and validates a strain rate dependent modelling framework that integrates a modified Puck failure criterion with logarithmic strain rate-dependent constitutive relations and cohesive zone modelling for progressive damage an alysis. Dynamic tensile tests conducted across strain rates from 10-4 to 103 s-1 demonstrate significant strain rate sensitivity, with failure strength increasing up to 1.6 times at high rates. The strain rate effects on material strength and stiffness are incorporated through logarithmic scaling laws from the literature, implemented via user-defined VUMAT subroutines. Experimental validation against low-velocity impact (LVI) and medium-velocity impact (MVI) tests demonstrates excellent agreement in predicting peak force, absorbed energy, and damage morphology. Through systematic comparison between strain rate-dependent and rate-independent models, this study explicitly quantifies the governing role of strain rate effects in failure progression—particularly in matrix-dominated failure modes—providing an experimentally validated framework for dynamic impact an alysis of composite laminates.

碳纤维增强聚合物（CFRP）复合材料在冲击载荷下的动态响应是结构应用的关键；然而，现有的模型不能充分捕捉不同冲击速度下应变速率相关的损伤机制。本研究开发并验证了一个依赖于应变率的建模框架，该框架将改进的Puck破坏准则与对数依赖于应变率的本构关系和内聚区域模型集成在一起，用于渐进损伤分析。在10-4到103 s-1应变速率范围内进行的动态拉伸试验显示出显著的应变速率敏感性，在高应变速率下，破坏强度增加了1.6倍。应变率对材料强度和刚度的影响通过文献中的对数标度定律合并，通过用户定义的VUMAT子程序实现。低速冲击（LVI）和中速冲击（MVI）试验验证表明，在预测峰值力、吸收能量和损伤形态方面具有良好的一致性。通过对应变率相关模型和应变率无关模型的系统比较，本研究明确量化了应变率效应在破坏进展中的控制作用，特别是在基质主导的破坏模式中，为复合材料层合板的动态冲击分析提供了一个实验验证的框架。

Experimental and numerical study on the out-of-plane low-velocity impact response of polyurea-coated corrugated steel plates

Yan-Wen Li, Yilin Ren, Shile Zhang, Binzhen Zhou, Hui Guo

doi:10.1016/j.tws.2026.114985

聚氨酯涂层波纹钢板面外低速冲击响应的实验与数值研究

Combining low-velocity impact testing and numerical simulations, this study investigates the dynamic responses and failure mechanis ms of polyurea-coated corrugated steel plates (PCCSPs). The results reveal that while flat steel plates (FSPs) are governed by membrane-stretching mechanis ms with failure initiating in the central impact zone, corrugated steel plates (CSPs) exhibit a bending-dominated response. This response induces a boundary failure mode wherein loads are transferred toward the extremities, leading to fracture at the endplate and weld regions. Building upon these findings, the study clarifies the mechanical role of the polyurea coating across varying geometric configurations. In FSPs, the polyurea coating mitigates localized stress concentrations, thereby enhancing the intrinsic energy absorption capacity of the substrate. In CSPs, a "competitive energy dissipation" mechanis m emerges between the polyurea coating and the boundary deformation. To quantitatively evaluate these phenomena, a normalized energy ratio ( η ) is introduced. This ratio decouples and quantifies the respective contributions of the geometric configuration and the polyurea coating to the total energy dissipation of the system. Finally, based on the established competitive failure framework, impact-resistant design guidelines centered on "boundary capacity matching" and "multi-dimensional synergistic protection" are proposed for PCCSPs.

结合低速冲击试验和数值模拟，研究了聚氨酯涂层波纹钢板（PCCSPs）的动态响应和破坏机制。结果表明，扁钢板（FSPs）受膜拉伸机制控制，破坏始于中心冲击区，而波纹钢板（CSPs）表现出弯曲主导的响应。这种响应导致了一种边界破坏模式，其中载荷被转移到末端，导致终板和焊缝区域断裂。在这些发现的基础上，该研究澄清了聚脲涂层在不同几何构型中的机械作用。在fsp中，聚脲涂层减轻了局部应力集中，从而增强了基体的内在能量吸收能力。在csp中，聚脲涂层和边界变形之间出现了一种“竞争性能量耗散”机制。为了定量地评价这些现象，引入了归一化能量比（η）。该比率解耦并量化了几何构型和聚脲涂层对系统总能量耗散的各自贡献。最后，在建立竞争失效框架的基础上，提出了以“边界容量匹配”和“多维协同保护”为核心的pccsp抗冲击设计准则。

Corotational non-conforming discrete shear gap geometrically nonlinear composite quadrilateral shell element with robust geometric stiffness

Chao Wu, Qinghua Han, Mingjie Liu, Hao Wu

doi:10.1016/j.tws.2026.114983

具有鲁棒刚度的非协调离散剪切间隙几何非线性复合四边形壳单元

In this paper, a new high-performance quadrilateral shell element, which can handle large displacements and large rotations, is proposed for geometrically nonlinear an alysis of thin composite structures. The biggest novelty is a new unified element-independent corotational formulation that can enable conventional linear 4-node quadrilateral shell elements to deal with geometric nonlinearity involving large displacements and large rotations, while simultaneously simulate the orientation-dependent behavior of anisotropic materials in composite shells. On basis of the differential principle of Rodrigues' formula which describes 3D finite rotation, the consistent variational transformation is performed on the variable relationship between the corotated and the global coordinate system such that the explicit expression of the element tangential relation matrix and geometric stiffness matrix can be derived in closed form of the discrete nodal controlling variables. In the corotational kernel, in order to improve the element performance with respect to the membrane behavior, the non-conforming membrane technique is applied to construct the membrane strain field. By interpolating the discrete shear gaps defined at the controlling nodes, a locking-free shear strain field of the plate element is constructed to overcome shear locking phenomenon. The constitutive laws at the level of a single laminate and at the stress resultant level are utilized to generate the internal element composite material stiffness. The accuracy and robustness of the proposed shell element formulation are demonstrated through the solutions of various benchmark problems.

针对薄型复合材料结构的几何非线性分析，提出了一种能够处理大位移和大旋转的高性能四边形壳单元。最大的新颖之处在于一种新的统一的独立于单元的旋转公式，它可以使传统的线性4节点四边形壳单元处理涉及大位移和大旋转的几何非线性，同时模拟复合壳中各向异性材料的取向依赖行为。罗德里格斯的差动原理的基础上公式描述了3 d有限旋转,一致的变分转换执行的同步旋转变量关系和全球坐标系统,元素的显式表达式切线关系矩阵和几何刚度矩阵可以在封闭形式的离散节点控制变量。在旋转核中，为了提高单元在膜性能方面的性能，采用非一致膜技术来构造膜应变场。通过插值控制节点处定义的离散剪切间隙，构造板单元的无锁紧剪切应变场，克服剪切锁紧现象。利用单层层合层和应力合成层合层的本构规律，计算了复合材料内部单元的刚度。通过各种基准问题的求解，证明了所提壳单元公式的准确性和鲁棒性。

Impact of corrosion on the axial capacity of cold-formed steel SHS and RHS stub columns

Ankit Kumar Maurya, Tekcham Gishan Singh

doi:10.1016/j.tws.2026.114973

腐蚀对冷弯钢SHS和RHS短柱轴向承载力的影响

Despite the implementation of anticorrosion measures, steel structures remain susceptible to natural corrosion. Accurate assess ment of their residual load-bearing capacity is therefore essential for effective maintenance, repair, and rehabilitation, enabling mitigation of corrosion-induced deterioration and extension of service life. This study presents an experimental investigation into the axial compression behaviour of corroded square and rectangular hollow steel sections. An electrochemical accelerated corrosion technique was employed to induce artificial corrosion in 27 steel stub column specimens fabricated from commercially available YSt 210 and YSt 310 steels, in accordance with Indian Standard IS 4923. Local geometric imperfections of the uncorroded specimens and the surface morphology of the corroded samples were captured using a handheld 3D laser scanner. The mechanical properties of the materials were determined through tensile coupon tests. Axial compression tests were then performed to evaluate the ultimate strengths and failure modes of the corroded specimens. The results show that the sectional area loss effectively predicts the location of local buckling failure, while both the axial capacity and deformation capacities decrease with increasing corrosion levels. A finite element (FE) model incorporating the scanned corrosion morphology was developed and validated against the experimental results. Comparison with existing design approaches showed that current American and European code provisions are conservative and do not explicitly account for corrosion-induced degradation. A modified Direct Strength Method design-based formulation incorporating the residual thickness parameter, was developed to estimate the load-carrying capacity of corroded steel stub columns.

尽管实施了防腐措施，钢结构仍然容易受到自然腐蚀。因此，准确评估其剩余承载能力对于有效维护、修理和修复至关重要，从而能够减轻腐蚀引起的恶化并延长使用寿命。本研究对腐蚀的方形和矩形空心钢截面的轴压性能进行了试验研究。根据印度标准IS 4923，采用电化学加速腐蚀技术对27个钢短柱试样进行人工腐蚀，这些钢由市买的YSt 210和YSt 310制成。使用手持式三维激光扫描仪捕获未腐蚀样品的局部几何缺陷和腐蚀样品的表面形貌。通过拉伸试验确定了材料的力学性能。然后进行轴压试验，评估腐蚀试件的极限强度和破坏模式。结果表明：截面面积损失能有效预测局部屈曲破坏的位置，而轴向承载力和变形承载力均随腐蚀程度的增加而降低；建立了包含扫描腐蚀形貌的有限元模型，并与实验结果进行了验证。与现有设计方法的比较表明，目前美国和欧洲的规范规定是保守的，没有明确考虑腐蚀引起的退化。提出了一种基于直接强度法设计的改进公式，将残余厚度参数纳入腐蚀钢短柱的承载力估算中。