Structures最新文献

{"title":"Elastic equivalent multi-bar models for corrugated steel plate shear walls in structural analysis","authors":"Bo-Li Zhu ,&nbsp;Jin-Song Duan ,&nbsp;Hai-Tao Luan ,&nbsp;Guo Yu ,&nbsp;Yan-Lin Guo","doi":"10.1016/j.istruc.2025.109490","DOIUrl":"10.1016/j.istruc.2025.109490","url":null,"abstract":"<div><div>The corrugated steel plate shear wall (CPSW) embedded within frames demonstrates high shear-bearing capacity and excellent energy dissipation performance even with relatively thin plates. It is essential to calculate the internal elastic forces and deformations in structural design. However, modeling CPSWs with shell elements results in high computational costs, making it necessary to develop an equivalent simplified model for CPSWs. To this end, based on the shear-bearing mechanism of CPSWs, the CPSW is equivalently simplified into a model of densely spaced beams or columns connected to the frame’s beams and columns, termed multi horizontal bar or multi vertical bar model. Multi-bars model with fixed connection to beams or columns behaving as multi-bar framing model is established to simulate shear-resistant behavior of CPSWs based on almost zero compressive stiffness in the direction perpendicular to the corrugations. The basic methodology of this research is to ensure that the initial equivalent stiffness of the multi-bar frame model aligns precisely with that of the refined finite element model (FEM). This alignment requires defining fundamental principles for determining the quantity and stiffness properties of both multi horizontal bars and multi vertical bars in the model. First, CPSW examples covering typical engineering dimensions are designed. The elastic load–lateral displacement curves under horizontal shear are subsequently calculated separately for the multi-bar frame model and the refined shell element model. From the comparison between these curves, the initial shear stiffness coefficients are identified, followed by deriving a formula to calculate the initial shear stiffness through parameter fitting. Comparative results between the two models indicate that the simplified equivalent model for calculating the elastic internal forces and lateral displacements of frame-CPSW structures not only streamlines structural analysis and enhances computational efficiency but also satisfies the accuracy standards required for structural strength design. Therefore, this model can be reliably applied in overall elastic calculations in structural design.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109490"},"PeriodicalIF":3.9,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322325","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":"Experimental study on the lateral impact resistance of PVA-ECC columns","authors":"Shuangshuang Cui ,&nbsp;Yiping Wang ,&nbsp;Zhongfei Wei ,&nbsp;Chen Wu ,&nbsp;Weihong Chen","doi":"10.1016/j.istruc.2025.109252","DOIUrl":"10.1016/j.istruc.2025.109252","url":null,"abstract":"<div><div>The dynamic response of the Engineering Cementitious Composite (ECC) columns under multiple impacts was investigated via a drop-hammer impact test. The effect of four factors, including axial compression ratio, impact velocity, reinforcement ratio, and stirrup ratio on the dynamic response of columns were considered. The deformation mechanisms, cracking details (such as cracking pattern, the maximum width and the number of cracks), and the time-history curves of impact force and displacement were evaluated and contrasted with those of the reinforced concrete (RC) columns. Furthermore, the degree of internal damage and bending deformation of ECC columns under multiple impacts were investigated. The results show that ECC column could absorb nearly twice as much energy as the RC column while maintaining structural integrity, and it could bear more impacts under the same reinforcement layout and axial compression conditions. The damage factor <em>D</em> in the deformation zone of ECC column was about 1/127 of RC column under the same impact energy of 7816 J, this indicated that the ECC column has a slight tendency towards damage and bending deformation, while the RC column had undergone brittle shear failure. Moreover, when the impact energy was 7816 J and the axial compression ratio increased from 0.13 to 0.4, the peak impact force of the ECC column increased, while the maximum mid-span displacement and residual mid-span displacement decreased. With the increase of reinforcements, the number of fine cracks increased, but the maximum crack width, peak impact force, and maximum mid span displacement decreased. The experimental results presented herein provide benchmark data for the practical engineering applications of ECC columns subjected to horizontal impact forces.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109252"},"PeriodicalIF":3.9,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322332","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":"Seismic reliability analysis of a new precast concrete beam-column joint under reversed cyclic loading","authors":"Hu Li ,&nbsp;Yongfeng Du ,&nbsp;Jianping Han ,&nbsp;Na Hong","doi":"10.1016/j.istruc.2025.109470","DOIUrl":"10.1016/j.istruc.2025.109470","url":null,"abstract":"<div><div>A novel precast concrete beam-column joint is developed to enhance the seismic behavior of prefabricated structures. Considering the inherent randomness in material properties (concrete compressive strength, longitudinal reinforcement tensile strength, and connector plate yield strength) and loading uncertainties, Latin hypercube sampling (LHS) was employed to generate probabilistic model parameters. Finite element analysis of the joint under stochastic conditions was implemented via the ABAQUS, incorporating nonlinear material behavior and contact interactions. The Park-Ang dual-parameter damage model was adopted to quantify joint damage severity, which served as the limit state criterion for reliability analysis. Structural failure probabilities across multiple damage thresholds were evaluated using second-order fourth-moment reliability theory. Additionally, Tornado graph-based sensitivity analysis identified critical parameters influencing seismic resistance. Results demonstrate that the proposed precast concrete beam-column joint exhibits significantly lower damage index (the mean reduced by 10.7 %) and collapse probabilities (reduced by 24.2 %) compared to conventional cast-in-place joints, confirming its superior seismic resilience. Sensitivity analysis revealed that longitudinal reinforcement tensile strength and cast-in-place concrete compressive strength dominate performance variability. These findings underscore the necessity of stringent quality control measures in prefabrication, particularly in ensuring robust mechanical interlock between beam-end longitudinal reinforcements and minimizing voids in cast-in-place concrete regions.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109470"},"PeriodicalIF":3.9,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313304","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":"Finite element model updating of existing bridge structures based on measured data and deep learning method","authors":"Yongjun Ni ,&nbsp;Yongpeng Ma ,&nbsp;Hongwei Lin ,&nbsp;Huidong Zhang ,&nbsp;Yi Zhuo","doi":"10.1016/j.istruc.2025.109403","DOIUrl":"10.1016/j.istruc.2025.109403","url":null,"abstract":"<div><div>Due to the influence of design parameter errors, construction inaccuracies, and time-dependent material degradation, such as shrinkage and creep, it is challenging to directly predict the bearing capacity of existing concrete girder bridge structures using numerical simulations. To address this issue, a finite element model (FEM) updating method based on a proxy model (PM) is proposed and applied to a real-life plate girder bridge, aiming to enhance the accuracy of bearing capacity evaluation compared to traditional estimation methods. Firstly, considering the critical mechanical parameters that significantly influence structural performance, such as deflection and fundamental frequency, a bridge structure in service was simulated using the FEM and subjected to random static vehicle loads. This generated a large dataset of deflection and fundamental frequency samples. Based on these samples, a high-precision proxy model (PM) was constructed using a deep neural network. Additionally, through sensitivity analysis, key mechanical parameters of the bridge structure—such as boundary restraint stiffness, compressive strength of concrete, and elastic modulus of reinforcement—were determined. The finite element model was then updated using these parameters. The reliability and accuracy of the proposed method were validated against in-situ measured data. The difference between the measured deflection and the predicted deflection of the updated model was only 0.4 %. Among three proxy models, the deep learning network (DLN) showed the best prediction performance with sufficient samples, while XGBoost proved more effective in cases with missing samples. Furthermore, the updated FEM was used to predict the bearing capacity of the original bridge. The results demonstrated that the proposed proxy model (PM) method provided high accuracy in assessing the bearing capacity, offering a reliable approach for the safety evaluation of existing bridge structures and the residual bearing capacity assessment of damaged bridges, even with limited measured data.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109403"},"PeriodicalIF":3.9,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313306","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":"Review of non-destructive testing for quality evaluation of in-service timber utility poles","authors":"Neda Bahrami ,&nbsp;Himadri Rajput ,&nbsp;Rahil Changotra ,&nbsp;Gordon Murray ,&nbsp;Quan (Sophia) He","doi":"10.1016/j.istruc.2025.109484","DOIUrl":"10.1016/j.istruc.2025.109484","url":null,"abstract":"<div><div>Wooden utility poles are widely utilized in power distribution and telecommunication infrastructure across North America. Exposure to weather, fungal decay, and termite infestations accelerate the degradation of wooden poles, leading to strength loss which may cause low reliability of power distribution. Routine inspections are conducted for condition assessment, enabling the identification of potential defects, and facilitating timely planning for renewals. The reliability and accuracy of these assessment techniques are important to illustrate the real condition of the poles. Incorrect assessments of pole strength can cause major problems, either poles are replaced too early due to mistakenly identified defects, or they fail because real issues were not timely identified. This paper aims to present a comprehensive review of various condition assessment techniques for in-service timber poles. It covers conventional inspection methods, important parameters indicating the strength of utility poles, and non-destructive testing (NDT) methods. The effectiveness of these techniques is analyzed, highlighting their respective benefits and limitations.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109484"},"PeriodicalIF":3.9,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321742","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":"Experimental and numerical study on steel–concrete–gradient aluminum foam energy absorbing panels subjected to impact load","authors":"Junyi Chen ,&nbsp;Yonghui Wang ,&nbsp;Huanan Xu ,&nbsp;Faqiang Qiu","doi":"10.1016/j.istruc.2025.109487","DOIUrl":"10.1016/j.istruc.2025.109487","url":null,"abstract":"<div><div>This paper presents a new steel–concrete–gradient aluminum foam energy absorbing panel (SC-GF-EAP) and investigates its dynamic behaviours by carrying out the impact tests and Finite Element (FE) simulations. Five specimens were tested to characterize their failure patterns and energy absorption capacities. All the specimens exhibited the same failure mode characterized by global flexure and local indentation of the SC composite panel as well as crushing of gradient aluminum foam panels. The dynamic response of SC-GF-EAP was identified to comprise two stages: loading stage and unloading stage. The influence of thickness of concrete core and aluminum foam on the dynamic characteristics of the SC-GF-EAP was experimentally revealed. A validated FE model was subsequently developed to predict damage distribution of the specimens, with subsequent parametric studies investigating these key parameters: aluminum foam density and hammer shape.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109487"},"PeriodicalIF":3.9,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321744","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":"Dielectric property enhancement of glass fiber-reinforced concrete via TiO₂ nanocomposites","authors":"Doğu Ramazanoğlu ,&nbsp;Azime Subaşı ,&nbsp;Ahmad Badreddin Musatat ,&nbsp;Ahmet Demir ,&nbsp;Serkan Subaşı ,&nbsp;Muhammed Maraşlı","doi":"10.1016/j.istruc.2025.109444","DOIUrl":"10.1016/j.istruc.2025.109444","url":null,"abstract":"<div><div>This study addresses the critical gap in traditional glass fiber-reinforced concrete (GFRC), which lacks tailored electrical properties for modern energy-related applications. We introduce a novel approach by incorporating a TiO₂-based hybrid composite (TiO₂-@) into GFRC to develop multifunctional composites with enhanced dielectric, mechanical, and energy storage capabilities. Experimental results demonstrate that TiO₂-@ doping at 2 % concentration achieves the most significant improvements: a dielectric constant increase to ∼420 at 100 Hz (compared to ∼180 for undoped GFRC), capacitance enhancement to 71 pF at 100 Hz (versus 18 pF in the reference), and AC conductivity elevation by 205 % after aging. The 2 % TiO₂-@ sample also exhibited a Leeb hardness increase to 486 HLD (from 159 HLD pre-aging), highlighting its structural robustness. Frequency-dependent analyses revealed modified polarization mechanisms and charge transport dynamics, with Cole-Cole plots and impedance spectroscopy confirming reduced capacitive reactance and enhanced interfacial interactions. These results establish TiO₂-@ as a transformative additive for GFRC, bridging the gap between structural performance and energy functionality. The work pioneers the integration of TiO₂ nanocomposites into cementitious matrices, offering a dual-purpose material for smart construction systems and embedded energy storage devices.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109444"},"PeriodicalIF":3.9,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321743","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":"Experimental study on mechanical properties of tubular cross section links made of low-yield-point steel","authors":"Liang-Dong Zhuang ,&nbsp;Jun-Yu Wu ,&nbsp;Ji-Zhi Zhao ,&nbsp;Li-Long Fan","doi":"10.1016/j.istruc.2025.109433","DOIUrl":"10.1016/j.istruc.2025.109433","url":null,"abstract":"<div><div>Tubular cross section links <strong>(</strong>TCSLs) offer significant advantages in terms of rotation capacity and out-of-plane stability, making them uniquely valuable in seismic design for buildings. However, research on the feasibility of further enhancing the energy dissipation capacity of TCSLs by using low-yield-point (LYP) steel is currently inadequate. This study focuses on the mechanical performance of LYP steel TCSLs under cyclic shear loading and finds their large rotation capacity and good energy dissipation efficiency. The influence of TCSL geometric parameters on mechanical properties is experimentally studied and thus design recommendations for engineering applications are proposed through parametric analysis of plastic shear capacity, elastic stiffness, and overstrength factor. First, twelve full-scale specimens are designed with five parameters, including the link length, width, and thickness of the web and flange, as test variables. Through cyclic loading, the mechanical properties of the links, such as shear capacity, rotation capacity, and overstrength, are measured. By comparing these mechanical properties of each specimen, the influence of geometric parameters on the mechanical performance of the links is summarized. Then, the finite element modeling strategy for TCSLs is clearly established. The developed numerical model accurately simulates the mechanical behaviors of the link under cyclic shear loading. Finally, numerical models are designed and tested to quantitatively determine the relationships between design parameters and mechanical properties.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109433"},"PeriodicalIF":3.9,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313309","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":"Review of prefabrication and volumetric mining structures: Current practice, challenges, and future prospects","authors":"Paul John Kreppold ,&nbsp;Andrew William Lacey ,&nbsp;Hong Hao ,&nbsp;Wensu Chen","doi":"10.1016/j.istruc.2025.109506","DOIUrl":"10.1016/j.istruc.2025.109506","url":null,"abstract":"<div><div>Prefabricated construction continues to gain popularity in the residential, commercial, and industrial sectors. Prefabrication developed into non-volumetric assembly and then into volumetric construction. Whilst volumetric construction reduces project risk by providing a safer, certain, and sustainable construction approach, it is not without its challenges, specifically the ability to transport oversized volumetric structures to remote Australian locations. It is yet to be accepted as a mainstream construction practice. While the evolution of volumetric construction continues to be a source of interest, more literature on structural volumetric construction within the mining sector is desired. This paper reviews various terminology used in industry and suggests unified terminology for industry participants, including those in the mining sector. The review considers the benefits of prefabricated structures at remote locations in Australia in terms of safety, productivity, quality schedule, cost and sustainability. The perceived challenges are reviewed in terms of planning, sea transportation and road transportation. The paper concludes by proposing an alternative to overcome the challenges and the construction requirements that require consideration.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109506"},"PeriodicalIF":3.9,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321745","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 integrated experimental and computational framework for design and analysis of WAAM fabricated structural elements","authors":"Pranjal Shukla ,&nbsp;S. Daggumati ,&nbsp;Degala Venkata Kiran ,&nbsp;P. Ashok Kumar ,&nbsp;Bijoy Rajak ,&nbsp;Kanwer Singh Arora","doi":"10.1016/j.istruc.2025.109437","DOIUrl":"10.1016/j.istruc.2025.109437","url":null,"abstract":"<div><div>The current research work presents an integrated experimental and computational framework for characterizing and predicting the mechanical behavior of Wire Arc Additive Manufacturing (WAAM)-produced materials. Tensile samples extracted from a WAAM-fabricated cylindrical tube were tested to evaluate stress-strain and failure behavior. The mechanical properties of WAAM components were compared with those of conventionally manufactured counterparts and benchmarked against industry standards such as EN 1993–1–1. A computational framework based on the Gurson-Tvergaard-Needleman (GTN) model was developed to predict load-displacement curves, local strain, and failure profiles. The framework was thoroughly validated against experimental results both qualitatively and quantitatively. To extend the proposed computational framework to complex geometries, notched specimens with varying radii were tested under uniaxial loads to induce a multiaxial stress state at notch locations. Experimental strain profiles and fractographic analyses were used to validate the numerical predictions, evaluating the proposed framework's robustness and reliability for structural applications. This work establishes a systematic approach to understand WAAM-produced materials and their potential for structural applications under diverse loading conditions.</div></div>","PeriodicalId":48642,"journal":{"name":"Structures","volume":"79 ","pages":"Article 109437"},"PeriodicalIF":3.9,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307529","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}