Engineering Structures最新文献

{"title":"Structural behaviour and failure modes of reinforced modular double truss bridge from full scale tests and 3D nonlinear numerical models","authors":"Mohamed Embaby ,&nbsp;M. Hesham El Naggar","doi":"10.1016/j.engstruct.2025.119867","DOIUrl":"10.1016/j.engstruct.2025.119867","url":null,"abstract":"<div><div>This paper presents an investigation into the structural behavior and failure modes of a reinforced full-scale double truss modular bridge subjected to full load moving truck and concentrated loads to failure. The field-testing program comprised operational loads of a specified truck positioned at ten different locations along the bridge span, followed concentrated loading to failure employing hydraulic jack to assess the bridge ultimate capacity and failure modes. Midspan deflections and axial strains of critical members were recorded and analyzed to deduce the bridge response characteristics under both service and ultimate load conditions. The measured responses were also used to validate the accuracy of three-dimensional finite element models and establish proper modeling techniques for the modular bridge. The finite element model is then used to conduct eigenvalue analyses of the bridge to evaluate its buckling behavior, and to perform both linear and nonlinear analyses to assess the bridge's response under service loads and its ultimate capacity under extreme loading. The numerical results closely aligned with the experimental results, validating the accuracy of the validated finite element model is employed to further explored the impact of reinforcing different parts of the bridge on its overall response and ultimate capacity. It is revealed that reinforcing 3/5 of the bridge's span significantly enhances both its stiffness and load capacity. Additionally, the calculated axial capacity of the top chord members is compared with the nominal axial compression capacity stipulated by the AASHTO standards.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"329 ","pages":"Article 119867"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A state-of-the-art review of bridges subjected to earthquake fault ruptures","authors":"Yuanzheng Lin ,&nbsp;Yejing Chen ,&nbsp;Zhouhong Zong ,&nbsp;Kaiming Bi","doi":"10.1016/j.engstruct.2025.119889","DOIUrl":"10.1016/j.engstruct.2025.119889","url":null,"abstract":"<div><div>With ongoing seismic activity worldwide and the rapid development of transportation infrastructure, an increasing number of bridge projects face the significant risk of crossing earthquake fault-rupture zones. Earthquake fault ruptures may lead to catastrophic damage to bridge structures that cross them. In particular, fault-crossing bridges can experience more complex responses, increased seismic demands, and greater damage potential compared to those exposed to conventional seismic actions, leading to significant casualties and economic losses. Therefore, it is imperative for engineers, researchers, and policymakers to understand the performance of bridges subjected to earthquake fault ruptures to ensure the design of reliable seismic-resistant bridges. This paper presents a comprehensive review of bridges subjected to fault ruptures. It begins with an overview of seismic damage to fault-crossing bridges in past earthquakes, followed by a discussion of the fundamental characteristics of near-fault and across-fault ground motions, including relevant simulation methods. Subsequently, the paper reviews theoretical analyses, experimental studies, and numerical simulations on fault-crossing bridges, and summarizes mitigation strategies against fault-crossing effects. Finally, the current state of research is assessed, and future research directions are outlined. This paper provides valuable insights into the impact of across-fault ground motions on bridge structures.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119889"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372537","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":"Analysis of non-uniform force distribution characteristics among tendons of prestressed anchor cable and experimental study on equal stress tensioning","authors":"Wen-Hui Bian ,&nbsp;Jun Yang ,&nbsp;Ke-Xue Wang ,&nbsp;Jia-Wang Zhan ,&nbsp;Yi Fang ,&nbsp;Mei-Qiang Dong ,&nbsp;Zhe Li","doi":"10.1016/j.engstruct.2025.119869","DOIUrl":"10.1016/j.engstruct.2025.119869","url":null,"abstract":"<div><div>Non-uniform force distribution among the tendons of prestressed anchor cables significantly impacts the performance and reliability of anchoring systems in geotechnical engineering. This study addresses the quantification of this variability through the development and validation of a \"non-uniformity coefficient (δ)\" using in situ experiments on 112 anchor cables. The research establishes a novel methodological framework that combines single-tendon and whole-bundle pull-out tests to precisely measure and analyze force distribution. Through these tests, the study reveals that 61.61 % of the cables exhibit moderate to extreme non-uniformity, particularly impacting cables with fewer tendons and longer free segments. A reduction coefficient of 0.75 is proposed to account for the impact of non-uniform forces on the theoretical limit of bearing capacity. The study develops and implements innovative equal stress tensioning equipment, further investigating its effectiveness in achieving uniform force distribution across anchor cables, demonstrating significant improvements in force uniformity and reductions in prestress loss, with non-uniformity coefficients improving from 0.6 to below 0.1 and prestress losses decreasing from 25.85 % to below 11 %. The wedge push lock-off and retraction control method is also analyzed, reducing prestress loss by approximately 27.35 % in single-tendon anchors and 16.63 % in six-tendon anchors. These findings not only enhance the understanding of non-uniform force distribution in anchor cables but also contribute innovative solutions that could significantly influence the design and operational strategies of geotechnical anchoring systems, particularly in complex engineering environments.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"329 ","pages":"Article 119869"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372730","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":"Flexural buckling of high strength steel welded H-section columns at high temperature","authors":"Shiyun Pang ,&nbsp;Weiyong Wang","doi":"10.1016/j.engstruct.2025.119879","DOIUrl":"10.1016/j.engstruct.2025.119879","url":null,"abstract":"<div><div>This paper presents an experimental and numerical investigation into the flexural buckling behavior of Q460, Q690 and Q960 steel welded H-section columns at high temperature. A total of 6 column specimens, spanning two different sections and three types of high strength steel (HSS), are tested at temperature of 600℃. The experimental programme included tensile coupon tests at high temperature, measurements of geometric imperfections and column tests at high temperature. Furthermore, finite element (FE) models were developed and validated against the experimental results, and these models were afterwards utilized in a parametric study. Lastly, the combined experimental and numerical data were used to evaluate the accuracy of the flexural buckling design rules for HSS welded H-section columns at high temperature set out in European, American and Chinese specifications and the direct strength method (DSM) by substituting the material properties. Modifications were proposed, and these revised buckling curves are recommended to be used to more accurately estimate the buckling resistances of HSS welded H-section columns at the temperature of 600℃.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"329 ","pages":"Article 119879"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372765","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":"Reusability diagnosis method for demolished bridge girders based on topological evolution of load paths","authors":"Ronghui Tu ,&nbsp;Ping Yuan ,&nbsp;Yafu Cai ,&nbsp;Lei Wang","doi":"10.1016/j.engstruct.2025.119893","DOIUrl":"10.1016/j.engstruct.2025.119893","url":null,"abstract":"<div><div>In this study, a reusability diagnosis method for demolished bridge girders is proposed by evaluating their damage state and future reuse environment. A modified strut-and-tie model (STM) is first established by considering the topological evolution of load paths. Limit failure criteria of the modified STM are given to predict the bearing capacity of demolished bridge girders. Subsequently, classification criteria for damage state and reuse environment are developed based on the bearing capacity and exposure levels during reuse, forming a decision matrix for diagnosing reusability. Finally, the applicability and effectiveness of the reusability diagnosis method are demonstrated through case studies of demolished structures. Results show that the configurations of load paths vary with the increase of shear span-depth ratios. The modified STM can accurately evaluate the bearing capacity, improving the accuracy of damage state assessments and reducing subjectivity in diagnosing reusability.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119893"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372538","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 response of RC walls coupled by slabs without coupling beams","authors":"Antonio Janevski,&nbsp;Tatjana Isaković","doi":"10.1016/j.engstruct.2025.119861","DOIUrl":"10.1016/j.engstruct.2025.119861","url":null,"abstract":"<div><div>The article investigates the seismic response of reinforced concrete (RC) walls coupled by slabs without coupling beams. The primary objective of the study was to determine the significance of wall piers coupling provided by the slabs and the role of their interaction in the overall seismic behaviour of the system. The influence of various parameters on the coupling level (CL) was systematically evaluated. Comprehensive non-linear response history and static analyses demonstrated that a significant CL can be achieved by slabs alone—up to 50 %. The criterion identifying buildings where large CL can be expected was defined and quantified for the first time. Slender walls with an aspect ratio exceeding 4 can be subjected to large CL, when a significant effective slab width can be activated (often up to the full span width). In such cases, the response was found to differ significantly from that typically observed in cantilever walls. A significant CL caused the seismic action to considerably alter the axial forces. The ratio of axial forces induced by seismic action to those due to gravity loads was found to be as high as 80 %. These changes further influenced the strength and stiffness of the piers, leading to significant redistributions of shear demand between piers, which cannot be captured by elastic analysis methods. For large CLs, the shear demand on individual wall piers subjected to axial compression forces induced by the seismic action reached up to 70 % of the total shear demand. It was demonstrated that, in the non-linear range, shear demand can also increase due to higher modes of vibration. While the amplification of shear forces due to coupling (frame action) increased with increasing CL, shear force amplification due to higher modes was found to decrease. Since simplified non-linear pushover analysis cannot capture this amplification, the values of shear forces should be corrected. For the first time, simple correction factors based on non-linear response history analyses were proposed for this purpose. In the case of the comprehensive set of analysed buildings, the accuracy of these corrections was within 20 %. The findings of this study highlight the importance of using non-linear analysis for the accurate seismic design of walls coupled only by slabs, emphasising the complex nature of the interaction between wall piers and slabs during seismic events.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"329 ","pages":"Article 119861"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and numerical study on out-of-plane post creep buckling behavior of concrete-filled steel tubular arch","authors":"Jia-Qi Sun ,&nbsp;Yue Geng ,&nbsp;J.Y. Richard Liew ,&nbsp;Yu-Tao Wang ,&nbsp;Yu-Yin Wang","doi":"10.1016/j.engstruct.2025.119843","DOIUrl":"10.1016/j.engstruct.2025.119843","url":null,"abstract":"<div><div>Long-span concrete-filled steel tubular (CFST) arches have gained widespread use due to their high strength, excellent seismic resistance, and ease of construction. However, these arches are susceptible to out-of-plane buckling, particularly when the creep of the concrete core significantly reduces buckling load resistance. This is primarily caused by increased deformation of the arch and early yielding of the steel tubes under lower load levels-a phenomenon known as post-creep out-of-plane buckling, which has not yet been experimentally studied. In this research, a 9-meter span CFST slender arch was first subjected to a sustained load for 356 days and then tested to failure without unloading to investigate the effects of creep-induced pre-buckling deformation on the out-of-plane buckling behavior. The confinement effect of the concrete core during both the sustained loading phase and the post-creep buckling stage was analyzed based on the test results. A finite element (FE) model, incorporating the nonlinear creep effects of concrete, was developed to simulate the post-creep out-of-plane buckling behavior of CFST arches. The model’s accuracy was validated against the experimental data, and the comparative results demonstrated its capability to reliably predict both the long-term and post-creep buckling behavior of CFST arches.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"329 ","pages":"Article 119843"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372732","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":"Enhanced energy absorption and reusability of 3D printed continuous carbon fibre reinforced honeycomb beams under three-point bending loads","authors":"Jinmyeong Heo ,&nbsp;Nak-Kyun Cho ,&nbsp;Do Kyun Kim","doi":"10.1016/j.engstruct.2025.119877","DOIUrl":"10.1016/j.engstruct.2025.119877","url":null,"abstract":"<div><div>The integration of continuous carbon fibre (CCF) into 3D printing technology enables the fabrication of enhanced honeycomb structures. While CCF reinforcement demonstrates considerable potential for improving structural performance, comprehensive research is required to evaluate these fabricated honeycomb structures under bending loads, particularly regarding their shape-memory characteristics and reusability under cyclic loading conditions. This study investigates the response and energy absorption performance of novel reusable 3D-printed honeycomb beams reinforced with CCF under three-point bending loads through both experimental and numerical approaches. Specimens were manufactured using a dual-nozzle fused deposition modelling 3D printer by combining a thermoplastic polyurethane (TPU) matrix with varying CCF volume fractions. The mechanical behaviour was characterized through force-displacement curves obtained from monotonic and cyclic three-point bending experiments. Finite element models were developed and experimentally validated to simulate the mechanical responses, enabling parametric studies of CCF volume fraction and impact velocity effects. The cyclic bending experiments demonstrated reusability, with specimens maintaining at least 61 % of their initial energy absorption capacity after 10 cycles. Impact velocity proved to be a significant factor in honeycomb beam behaviour, with higher velocities leading to increased deformation and energy absorption. However, the incorporation of CCF introduced repulsive forces that caused fluctuations in force-displacement curves at higher speeds. Higher CCF volume fractions enhanced both load-bearing capacity and energy absorption, with the highest CCF content model achieving a 7.24 % weight reduction while improving energy absorption by 59.45 %. These findings provide valuable insights for designing reusable lightweight honeycomb beams with superior energy absorption capabilities.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"329 ","pages":"Article 119877"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372733","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":"Research on arch dam deformation prediction method based on interpretability clustering and panel data model","authors":"Dongyan Jia ,&nbsp;Jie Yang ,&nbsp;Chunhui Ma ,&nbsp;Lin Cheng ,&nbsp;Sheng Xiao ,&nbsp;Xiuxiu Gong","doi":"10.1016/j.engstruct.2025.119794","DOIUrl":"10.1016/j.engstruct.2025.119794","url":null,"abstract":"<div><div>The traditional clustering method for deformation monitoring points of concrete arch dams does not adequately account for the influence of deformation factors. Additionally, the single monitoring point deformation prediction model struggles to accurately portray the overall operational status of the dam. A deformation prediction method for arch dams is proposed based on interpretable clustering and the panel data model to address the aforementioned issues. Firstly, Particle Swarm Optimization (PSO) is utilized to enhance the deformation prediction capability of the eXtreme Gradient Boosting (XGBoost) model. Secondly, SHapley Additive exPlanations (SHAP) are employed to analyze the contribution of factors influencing deformation in different parts of the arch dam. Based on these contributions, clustering of arch dam deformation monitoring points is performed. Finally, leveraging the clustering results of monitoring points, the PSO-optimized iTransformer model is employed to establish a deformation prediction model for arch dams using panel data model. Compared with traditional methods, the clustering of arch dam deformation monitoring points based on the contribution of deformation factors ensures that the clustering results align more closely with the deformation patterns observed in arch dams. Additionally, the deformation prediction model based on panel data models offers a more accurate reflection of the overall deformation safety status of concrete arch dams. This study introduces a novel approach to cluster analysis for dam deformation monitoring points and prediction analysis using panel data models.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"329 ","pages":"Article 119794"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372764","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":"Acoustic emission characteristics of cross-laminated timber-bamboo column with various layup configurations under axial compression","authors":"Qianzhi Huang ,&nbsp;Yi Wang ,&nbsp;Xuechun Wang ,&nbsp;Ting Wang ,&nbsp;Zhiqiang Wang ,&nbsp;Meng Gong","doi":"10.1016/j.engstruct.2025.119883","DOIUrl":"10.1016/j.engstruct.2025.119883","url":null,"abstract":"<div><div>The fast-growing Chinese fir and bamboo are abundant in China, which have been utilized to manufacture cross-laminated timber-bamboo (CLTB) and glued-laminated timber-bamboo (GLTB). This study was aimed at examining the layup configurations of CLTB and GLTB specimens on their axial compressive performance. The acoustic emission (AE) technique was employed to monitor the failure process of CLTB and GLTB column specimens. The results indicated that the compressive strength (<em>f</em>_<em>c</em>) and modulus of elasticity (MOE) of CLTB were about 2.04 and 1.13 times of CLT, respectively. Compared with CLTB, the GLTB specimens had about 33 % and 30 % higher <em>f</em>_<em>c</em> and MOE, respectively. Based on the AE parameter analysis, the failure process of all specimens could be grouped into gentle, steady, and steep periods, and the “fracture precursor characteristic area” could be employed to predict the failure. The specimens made of bamboo scrimber as outer longitudinal lamination released higher accumulated energy than those with fast-growing Chinese fir lumber. In addition, different optimal clustering number was obtained for the specimens with different layup configurations, which resulted in three kinds of signal clusters corresponding to different failure. The use of AE technique in this study might contribute to the health and safety monitoring of timber buildings.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"329 ","pages":"Article 119883"},"PeriodicalIF":5.6,"publicationDate":"2025-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143372731","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}