Thin-Walled Structures最新文献

{"title":"Design shear capacity of steel beams with compact flanges and slender corrugated webs","authors":"Ahmed S. Elamary ,&nbsp;Wenxuan Le ,&nbsp;Man Zhou ,&nbsp;Zeyad Elamary","doi":"10.1016/j.tws.2026.114631","DOIUrl":"10.1016/j.tws.2026.114631","url":null,"abstract":"<div><div>Previous studies on corrugated web steel beams (CWSBs) have indicated that their shear capacity is often not fully utilized because premature local flange buckling occurs when the flange outstand is excessive. Despite extensive research efforts and various proposed design equations, inconsistencies persist in accurately evaluating the shear resistance of beams with compact flanges and slender corrugated webs (CFSCWBs). This study emphasizes the structural advantages of CFSCWBs, in which compact flanges effectively resist yielding and local buckling, thereby enabling the web to mobilize its full shear capacity once the flange undergoes limited yielding. An innovative method for evaluating shear capacity is proposed, building upon prior research and the provisions of Eurocode 3. The reliability of the proposed approach is substantiated through experimental testing on CFSCWB specimens and numerical simulations. Finite element (FE) models incorporating initial imperfections, residual stresses, and material nonlinearity were developed and validated against experimental data under both three- and four-point loading conditions. A parametric analysis is performed using the validated model to investigate the outcomes of the proposed approach, incorporating various parameters such as the ratio of horizontal fold to web height, flange thickness, and flange yielding. Based on the experimental and analytical analyses, equations have been proposed to estimate the shear capacity of CFSCWB. This proposed technique can predict the shear capacity of a CFSCWB with a maximum variance of ± 10 %.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114631"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Decoupled multifunctional metamaterials for ultra-broadband sound absorption in a two-port system and efficient mechanical properties","authors":"Pengwei Ma ,&nbsp;Han Wang ,&nbsp;Xueling Fan ,&nbsp;Ming Luo","doi":"10.1016/j.tws.2026.114746","DOIUrl":"10.1016/j.tws.2026.114746","url":null,"abstract":"<div><div>Acoustic-mechanical multifunctional metamaterials extend beyond the conventional application scope of single-domain acoustic or mechanical metamaterials. Its significant potential in fields such as aerospace, marine engineering, and mechanical manufacturing underscores broad prospects for future development. A central challenge in such multifunctional design, particularly in two-port systems, lies in enhancing additional functionalities without compromising the original acoustic performance. In this paper, a novel multifunctional metamaterial that achieves high performance in both acoustic and mechanical domains was developed. Acoustic functionality was realized by exploiting the impedance manipulation characteristics of double resonant cavities in a two-port system. Connecting multiple such cavities with staggered resonant frequencies enabled ultra-broadband absorption, yielding an average absorption coefficient of 0.73 within 120–3350 Hz using an ultra-thin structure of only 46 mm. For mechanical performance, the integration of lattice and chiral structures yielded remarkable improvements. The lattice-based metamaterial exhibited an 80.4% increase in specific plateau stress, indicating superior load-bearing stability. The chiral-based metamaterial achieved a specific compressive strength of 8.87 ± 0.41 MPa·cm³/g and a specific energy absorption of 3.41 ± 0.27 kJ/kg at a low density of 0.34 g/cm³, demonstrating exceptional efficiency. Crucially, the acoustic and mechanical components are decoupled in design, allowing the mechanical core to be replaced to meet different application demands without affecting the acoustic performance in the two-port system. This decoupling metamaterial offers a new paradigm for designing versatile multifunctional metamaterials.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114746"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seismic behavior of cold-formed steel frames with double-layer X-shaped braced shear panels","authors":"Yi Xiang ,&nbsp;Wenjun Ni ,&nbsp;Yu Shi ,&nbsp;Xinmei Yao ,&nbsp;Jun Yang ,&nbsp;Jiang Du","doi":"10.1016/j.tws.2026.114735","DOIUrl":"10.1016/j.tws.2026.114735","url":null,"abstract":"<div><div>To improve the lateral resistance and seismic resilience of cold-formed steel (CFS) structures, a novel prefabricated CFS frame with double-layer X-shaped braced shear panels (CFS-DXBP) is proposed. Quasi-static tests were conducted on two full-scale specimens to investigate their failure mechanisms, shear strength, lateral stiffness, energy dissipation capacity, and ductility, with particular emphasis on evaluating the influence of magnesium crystal board (MCB) sheathing on these performance metrics. Particular attention was also paid to the shear deformation behavior of the double-layer bracing system and the distribution of lateral loads among the primary lateral-resisting members, with the objective of evaluating the structural synergy. Based on the test results, skeleton curve and hysteretic models were developed to characterize the mechanical behavior of the structure. Furthermore, theoretical analyses were conducted to predict the peak load-carrying capacity of both sheathed and unsheathed configurations. The experimental results demonstrate that the proposed structure exhibits significantly enhanced shear strength and energy dissipation capacity compared to conventional CFS shear walls. In addition, although the presence of MCB does not alter the ultimate failure mode, it significantly improves the load-carrying capacity and ductility of the structure, and reduces the structural energy dissipation capacity.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114735"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel Directly Reusable Column Base Connection: Experimental Investigations on the Effects of Baseplate and Connector Thickness","authors":"Aswin Kumar Rajakala Jeyabalan ,&nbsp;Sivaganesh Kanmani Selvaraj ,&nbsp;Tak-Ming Chan ,&nbsp;Wei Pan","doi":"10.1016/j.tws.2026.114666","DOIUrl":"10.1016/j.tws.2026.114666","url":null,"abstract":"<div><div>The significance of reusable connections has surged recently due to increasing waste generation and the extraction of natural resources within the construction industry. The adoption of interlocking systems has become prominent in contemporary structural connections due to their ease of assembly. This paper examines the newly developed hold-down type reusable column base connection, which is based on a plate interlocking mechanism. Specifically, it investigates the effects of base plate thickness and connector thickness under monotonic lateral loading. The reusability of the newly developed connection is demonstrated through repeated loading tests, indicating that the column base connection can be dismantled and reused. The loading regimen includes two initial cycles up to the yield strength, followed by a final loading cycle leading to ultimate failure, thereby establishing the connection's reusability. The degree of semi-rigidity is assessed by comparing the connection's rotational stiffness to that of pinned and fixed connections. The experimental results in this study provided a technical base to understand the structural behaviour of the connection and, in turn, develop a theoretical approach to predict the initial elastic stiffness and yield point of the connection, the key parameters that ascertain its eligibility for reuse. The theoretically predicted values align closely with the experimental results obtained. Additionally, a design example is provided to enhance the readers’ understanding and demonstrate the practical applicability of the developed component model for the proposed interlocking-type column base connection.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114666"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlation analysis of wind pressure on tracking photovoltaic panels and development of a multivariate joint probability density function model in complex near-ground wind conditions","authors":"Terigen Bao ,&nbsp;Zhengnong Li ,&nbsp;Yaowei Fan ,&nbsp;Ou Pu","doi":"10.1016/j.tws.2026.114689","DOIUrl":"10.1016/j.tws.2026.114689","url":null,"abstract":"<div><div>Wind pressure measurements from tracking photovoltaic panels in complex near‐ground environments exhibit significant spatial correlations, which are crucial for accurate wind pressure field modeling. This study proposes a comprehensive framework for constructing a joint probability density function (JPDF) model for multivariate wind pressure fields. Detailed analyses reveal that the correlation between wind pressure measurements is strongly dependent on panel tilt angle and wind direction; for example, correlation coefficients increase markedly with tilt angles above 15°, often exceeding 0.75 at 60° tilt, and are higher for near head-on wind directions compared to more oblique incidences. To capture the complex distribution characteristics, a flexible mixture model is employed to effectively describe the marginal distributions of wind pressure data. Various Copula functions are then integrated to model the interdependencies among measurement points, with optimal selections determined via AIC, BIC, HQIC, and SIC criteria. The results indicate that the Student-t Copula and Gumbel Copula are predominant in the optimal models, with the Student-t Copula accounting for 77%–80% of cases, and a maximum error below 8%. These findings underscore the importance of incorporating spatial correlation in JPDF modeling, significantly enhancing the reliability and precision of wind pressure field predictions, and providing valuable insights for structural wind load design in complex environments.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114689"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ferritic stainless steel built-up I-section columns: Testing, numerical modelling and design","authors":"Binxu Li,&nbsp;Haolin Sun,&nbsp;Ke Jiang","doi":"10.1016/j.tws.2026.114726","DOIUrl":"10.1016/j.tws.2026.114726","url":null,"abstract":"<div><div>Cold-formed steel built-up section members have attracted increasing interest due to their potential to provide higher load-carrying capacity than conventional single-section members. Ferritic stainless steels, characterised by their low nickel content, offer a cost-effective and sustainable alternative to austenitic grades, while maintaining adequate mechanical properties and corrosion resistance. This paper investigates the structural behaviour and capacity of ferritic stainless steel built-up I-section columns failing by local buckling and local–flexural interactive buckling. An experimental programme was first conducted, including tensile coupon tests, measurements of initial global and local geometric imperfections, and axial compression tests on ten built-up I-section column specimens. Each specimen comprised two identical press-braked ferritic stainless steel channel sections connected using self-drilling screws. Subsequently, finite element models were developed and validated against experimental results. Parametric studies were carried out to discuss the effects of key design parameters. The accuracy and reliability of the codified Effective Width Method and Direct Strength Method in predicting the capacities of ferritic stainless steel built-up I-section columns were evaluated, indicating that: (i) the Effective Width Method offers consistently conservative predictions, underestimating column failure loads by 10% on average; (ii) the Direct Strength method yields greater scatter but improved accuracy, underestimating load-carrying capacities by an average of 1%; (iii) the Effective Width Method provides accurate and consistent predictions for columns failing by local buckling, while its predictions for local–flexural interactive buckling are more scattered and conservative; (iv) both methods exhibit increasingly conservative and scattered predictions as the column slenderness increases. In summary, the existing codified design methods specified in AISI S100 can be extended to the design of ferritic stainless steel built-up I-section columns.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114726"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on dissipation effects and mechanisms of lightweight spherical skeletons on impact loads in liquid-filled structures under high-speed projectile penetration","authors":"Mengmeng Wu ,&nbsp;Hailiang Hou ,&nbsp;Nianming Hu ,&nbsp;Dian Li ,&nbsp;Jing Wu ,&nbsp;Yongqing Li ,&nbsp;Fang Huang","doi":"10.1016/j.tws.2026.114741","DOIUrl":"10.1016/j.tws.2026.114741","url":null,"abstract":"<div><div>This study investigates the dissipation effects and underlying mechanisms of lightweight spherical skeletons (LSSs) embedded in liquid-filled structures under impact loads induced by high-speed projectile water entry. Leveraging the characteristics of shock waves and cavitation extrusion loads generated by high-speed projectile penetration, we designed shock tube experiments and ballistic impact tests, which were complemented by numerical simulations to quantify the dissipation effects of LSSs and analyze their working mechanisms. Results indicate that the LSSs can induce asynchronous reflection and transmission of shock waves. The average pressure peak attenuation rate of the wavefront follows a power law with the number of LSSs. Furthermore, the LSSs can effectively enhance the flow resistance of the liquid, mitigate cavitation extrusion loads on the structure, and thus significantly suppress the global deformation of the liquid-filled structure’s front and rear plates.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114741"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147386620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-plateau crashworthiness characteristics of star-shaped honeycombs with non-conventional semicircular ligaments","authors":"Liu Rong ,&nbsp;Zhong Yifeng ,&nbsp;Tang Yuxin ,&nbsp;Poh Leong Hien","doi":"10.1016/j.tws.2026.114684","DOIUrl":"10.1016/j.tws.2026.114684","url":null,"abstract":"<div><div>This study proposes a novel star-shaped honeycomb with non-conventional semicircular ligaments (SH-SL), characterized by an asymmetric ligament design where the horizontal semicircular ligament (HSL) acts as a deformation trigger to program a sequential collapse. Through combined experimental, numerical, and theoretical analyses, the SH-SL exhibits a stable dual-plateau compressive response: an initial plateau governed by progressive bending of the HSL, followed by a secondary stress elevation due to inclined-wall contact and engagement of vertical ligaments. A newly introduced dimensionless collision coefficient enables the a priori classification of deformation into contact or non-contact modes, leading to more accurate stress predictions. Theoretical models for elastic modulus and dual-plateau stresses are developed and validated. Parametric studies reveal that reducing the HSL radius promotes controlled wall contact, activating the second plateau and significantly enhancing post-yield performance. Compared to the traditional star-shaped honeycomb (TSH), the optimized SH-SL achieves nearly double the plateau stress and a 3.5-fold increase in specific energy absorption, while also demonstrating a 5.5 times higher elastic modulus. These advancements position the SH-SL as a promising lightweight metamaterial for impact-protection applications requiring high stiffness and superior energy absorption.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114684"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application and prediction models of calibrated multi-surface scale parameters in shear deformation theories for flexural vibration of circular nanoplates","authors":"Kangle Han ,&nbsp;Jiangong Yu ,&nbsp;L. Elmaimouni","doi":"10.1016/j.tws.2026.114662","DOIUrl":"10.1016/j.tws.2026.114662","url":null,"abstract":"<div><div>Coupled models that integrate surface elasticity with shear deformation theories, including Kirchhoff plate theory (KPT), first-order shear deformation theory (FSDT), and third-order shear deformation theory (TSDT), provide essential bridges for investigating nanomechanics problems in thin-walled structures. However, the calibration and applicability of multi-surface scale parameters in the coupled models remain key technical challenges. In this paper, an improved Legendre polynomial method is extended to obtain the first four orders of analytical solutions for the flexural vibration of coupled models with complex surface elastic boundary conditions. Molecular dynamics (MD) simulations are employed to determine the natural frequencies using an asymmetric excitation approach. A novel calibration method that accounts for the coupled interactions among multi-surface scale parameters is developed. Notably, the calibrated results are presented as planar distributions rather than conventional discrete points, and the calibrated plane derived from KPT is located below those of FSDT and TSDT. The KPT model achieves calibration accuracy comparable to the other two theories, while requiring smaller surface elastic parameters and surface residual stress, along with larger surface density parameters. The calibrated models reduce the error in characterizing flexural vibration to 0.09%. In addition, predictive models are developed to directly estimate the multi-surface scale parameters in the coupled models. These models significantly enhance the engineering applicability of multi-surface scale parameters by eliminating complex numerical procedures and costly MD simulations. These findings provide important theoretical guidance for improving the stability and reliability of nanodevices.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114662"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stability reliability analysis of kiewitt single-layer gridshells with experimentally validated topology-constrained initial imperfections","authors":"Chenyu Wu ,&nbsp;Shouchao Jiang ,&nbsp;Qiang Zeng ,&nbsp;Shaojun Zhu","doi":"10.1016/j.tws.2026.114669","DOIUrl":"10.1016/j.tws.2026.114669","url":null,"abstract":"<div><div>This study provides a comprehensive stability reliability analysis of the Kiewitt single-layer gridshell (SLG) under actual topology-constrained initial imperfection fields proposed by the constrained stochastic imperfection modal method (CSIMM). A measurement experiment of scaled SLG is carried out, and the consistency between the measured and simulation results further validates the rationality of the CSIMM. Based on the validated imperfection field simulation theory, the influence of key parameters variability on the probability distribution of nonlinear buckling capacity (NBC) for imperfect SLGs is revealed, among which the load condition variability significantly influences the probability distribution of NBC, whereas the effect of material properties variability remains minimal. Subsequently, NBC probability distributions of 24 typical perfect Kiewitt SLGs with consideration of key parameters variability are obtained for probability reliability analysis, on which basis the reliability significance of NBC derived from the prevalent eigenmode imperfection method (EIM) is clarified, indicating that the EIM fails to ensure sufficient safety margins under actual imperfection fields. Meanwhile, several recommendations for current specification revision are offered: the imperfection amplitude is suggested to be adjusted to 1/1500 of structural span; for designer acceptable assurance rates of 99% and 95%, the safety factors are advised to be 1.44 and 1.30, respectively. As a result of reliability analysis, a novel calculation method of NBC for imperfect SLGs with topology-constrained imperfection fields is proposed, which comprises a benchmark method using Monte Carlo simulation and a simplified method according to the modified specification.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"224 ","pages":"Article 114669"},"PeriodicalIF":6.6,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147387275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}