Engineering Structures最新文献

{"title":"Seismic behavior and performance evaluation of longitudinal concrete restrainer in highway bridges","authors":"Haoyuan Gao,&nbsp;Jianzhong Li,&nbsp;Xu Chen,&nbsp;Zhongguo Guan","doi":"10.1016/j.engstruct.2025.120151","DOIUrl":"10.1016/j.engstruct.2025.120151","url":null,"abstract":"<div><div>Concrete restrainer is used as an unseating prevention device for small-to-medium span highway bridges, arranged at the bottom of the girder to limit pier-girder relative displacement through pounding with the piers. To investigate the seismic behavior and propose the proper mechanical model of the concrete restrainer, six specimens were designed for unidirectional quasi-static tests. The observed failure mode, force-displacement relationship, and strain distribution under monotonic lateral loads were summarized and analyzed in detail, and the influence of parameters such as shear span ratio, vertical reinforcement ratio, and volumetric stirrup ratio were further discussed. Utilizing the rigid body rotation mode assumed according to the observations of the tests, the peak capacity prediction model and force-displacement skeleton model were proposed. These proposed theoretical analytical models were compared with available ones and demonstrated effective through comparisons with experimental results, due to the consideration of the different states of steel bars caused by the difference of positions. The finite element model of the concrete limiter was developed using ABAQUS, which further validated the rationality of the theoretical model.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120151"},"PeriodicalIF":5.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685029","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":"A substructure shake table test method for pile-supported wharves: Numerical validation","authors":"Zhuoxin Wang ,&nbsp;Yao Cui ,&nbsp;Miao Cao","doi":"10.1016/j.engstruct.2025.120178","DOIUrl":"10.1016/j.engstruct.2025.120178","url":null,"abstract":"<div><div>To investigate the seismic performance of pile-supported wharves (PSW), 1 g shake table testing with large-scale specimens is an effective dynamic testing method. However, scaled soil is challenging to replicate the pile-soil interactions (PSI) accurately. Large soil mass also occupies the shake table load capacity, limiting the testing of large-scale specimens. This work proposes an offline real-time substructure shake table test (offline RSST) method for PSW, eliminating the heavy-load soil box to facilitate large-scale PSW specimen loading with reduced costs. In offline RSST, the wharf is divided along the soil surface into \"superstructure\" and \"foundation\". The foundation is simplified into an amplifier connected in series with the superstructure to form a wharf substructure (WS). The lateral stiffness of the amplifier is tuned to make equal the fundamental periods of the WS and the wharf prototype. Furthermore, an offline FFT/IFFT procedure is employed to adjust the WS's input wave to replicate the dynamic response of the wharf prototype. To verify the offline RSST, the wharf prototype and WS's seismic responses are compared in the numerical domain, presenting frequency domain error of 3 %, 17 % and 6 % for PSW deck accelerations, structural displacements and pile head moments. These results indicate that the offline RSST has reasonable accuracy with a theoretical basis, providing a feasible platform for engineering-oriented dynamic testing for PSW.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120178"},"PeriodicalIF":5.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696052","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":"Demountable interlocking connection with embedded plates for diaphragm systems: Effect of key parameters and design recommendations","authors":"Peng Chen ,&nbsp;Jiachen Guo ,&nbsp;Tak-Ming Chan","doi":"10.1016/j.engstruct.2025.120170","DOIUrl":"10.1016/j.engstruct.2025.120170","url":null,"abstract":"<div><div>Demountable connections play a crucial role in promoting the reuse of building structures, as individual components can be disassembled and reused at the end of their service life. An innovative demountable interlocking web connection that relies on neither traditional welding nor bolting methods, greatly improving assembly and disassembly efficiencies compared with traditional bolted connection, has been previously proposed and experimentally investigated. This paper presents a comprehensive finite element analysis to investigate the key parameters influencing the performance of the proposed demountable connection. A finite element model was first developed and validated against experimental test results, and subsequently parametric analyses including the faceplate tooth width, connector thickness, connector flange height and the faceplate material were carried out. The finite element analysis results revealed that the application of thicker connectors with identical shear capacity significantly relieved the local plasticisation of faceplate tooth by increasing the contact area, which is beneficial in improving the reusability of the connection. Furthermore, three distinct failure modes were observed: the shear failure of connectors, flexural failure of connector flanges, and the failure of faceplate teeth. To enable the reuse of floor slabs and fully utilise the shear capacity of the connectors, it is recommended that the connection should be designed to fail in shear failure of the connectors by increasing the tooth widths, upgrading the faceplate material, and enhancing the height of the connectors' flanges. Design equations were also proposed corresponding to these three failure modes.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120170"},"PeriodicalIF":5.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696051","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":"Dynamic direct shear strength of the assembled interface of precast bridge piers under impact loading","authors":"Longlong Wang ,&nbsp;Yanchen Song ,&nbsp;Qiang Han ,&nbsp;Xuepeng Liu ,&nbsp;Bo Geng ,&nbsp;Xiuli Du","doi":"10.1016/j.engstruct.2025.120150","DOIUrl":"10.1016/j.engstruct.2025.120150","url":null,"abstract":"<div><div>The assembled interface between precast bridge segments plays a critical role in maintaining the structural integrity of precast piers. However, shear-slip failure at these interfaces is likely to occur under high-amplitude lateral forces, such as those induced by impact loading. To investigate the dynamic shear strength of assembled interfaces in precast bridge piers, 40 assembled interface specimens were designed and fabricated, considering the variations in interface configuration, material type, shear reinforcement quantity, and axial force levels. Subsequently, direct shear tests were conducted on 16 specimens subjected to drop hammer impact loading and 24 specimens under quasi-static loading. Based on the test results, a finite element model was developed and validated against experimental data to simulate the shear-slip behavior of the specimens under dynamic loading conditions. Furthermore, existing code-formulated interface shear strength models were evaluated using the experimental and numerical results, and an improved analytical model was proposed to predict the dynamic shear strength of assembled interfaces. Finally, using the proposed interface shear strength model, the failure modes of precast bridge piers under lateral impact loading were analyzed in comparison with their diagonal section shear resistance. The results demonstrate that chemical adhesion, shear keys, axial force levels, and dowel reinforcement significantly enhance the shear capacity of the assembled interface. The proposed analytical model provides accurate predictions of the dynamic shear resistance of assembled interfaces. To prevent interface shear-slip failure in precast bridge piers, it is recommended that the axial load ratio should be no less than 0.025, the longitudinal reinforcement ratio should be at least 0.6 %, and the volumetric ratio of transverse reinforcement should not exceed 1.85 %.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120150"},"PeriodicalIF":5.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685549","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":"Virtual-real twin data powered deep adaptive detection method for corrosion damage in cable aluminum sheath structure using helical guided waves","authors":"Bin Zhang ,&nbsp;Zewen Luo ,&nbsp;Xiaobin Hong ,&nbsp;Zhuyun Chen ,&nbsp;Ruyi Huang","doi":"10.1016/j.engstruct.2025.120195","DOIUrl":"10.1016/j.engstruct.2025.120195","url":null,"abstract":"<div><div>Corrosion damage is the most harmful failure of aluminum sheath accessories of high voltage cable, which directly threatens the security and stability of power grid. AI-enabled ultrasonic guided wave is a promising detection technology for corrosion damage of power components. However, the pain point of data-driven deep learning methods in engineering practice is the difficulty in building complete datasets and the poor physical interpretability of models. In this paper, a virtual-real twin data powered deep adaptive detection method based on helical guided wave is proposed to inspect the corrosion damage in cable aluminum sheath structure. Firstly, the twin data for network training is constructed by simulation model and guided wave mechanism model. Secondly, the generalization features between the standardized twin data and the actual data are learned through the deep transfer network. Finally, a twin data-driven deep adaptive network (TDDAN) is formed by combining simulation model construction, guided wave mechanism model and deep transfer network, which realizes high-precision intelligent detection of aluminum sheath corrosion damage of high-voltage cable. The average accuracy of corrosion damage localization and degree identification of aluminum sheathed high-voltage cable can reach 95.83 %, which shows stronger interpretability, universality and generalization ability than the existing methods.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120195"},"PeriodicalIF":5.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696050","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":"Experimental study on progressive collapse behaviour of intact and slightly earthquake-damaged exterior precast concrete joints, and finite element modelling of building performance","authors":"Van Hung Nguyen ,&nbsp;Kang Hai Tan","doi":"10.1016/j.engstruct.2025.120146","DOIUrl":"10.1016/j.engstruct.2025.120146","url":null,"abstract":"<div><div>This study investigates progressive collapse behaviour of intact and slightly earthquake-damaged exterior precast concrete (PC) joints. To achieve this, an experimental programme was carried out on four exterior PC joints incorporated with headed bars and plastic hinge relocation method. These specimens consisted of two intact and two slightly earthquake-damaged joints which were tested under a penultimate column removal scenario. The test results demonstrated that these joints exhibited robust resistance during both flexural and catenary action (CA) stages. Although earthquake-damaged joints showed reduced stiffness and deformation capacity, their strength remained comparable to that of intact joints. However, column failure occurred due to excessive deformation combined with <em>P</em>-Δ effects. To gain deeper insights into the experimental findings, the moment-rotation behaviour of the tested joints from this study and companion studies on interior joints [1,2] was analysed and compared against UFC4–23–03 provisions [3], highlighting the influence of joint flexibility and collapse mechanisms. Specifically, the experimental moment-rotation curves aligned with UFC4–23–03 in terms of moment capacity but exhibited smaller elastic stiffness due to inherent joint flexibility. In addition, beam rotations surpassed UFC4–23–03 predictions because of the omission of CA while column rotations were limited by premature column failure. The experimental curves were subsequently integrated into a proposed 3D finite element model for progressive collapse analysis, which accounted for slab contributions. Numerical simulations underscored the significant role of tensile membrane action (TMA) in reducing middle joint displacement (MJD) and delaying column failure. In addition, the slightly earthquake-damaged structure exhibited a marginally smaller MJD compared to the intact structure, due to reduced ductility. These findings emphasised the necessity of proper reinforcement detailing to optimise TMA and the adoption of strong-column-weak-beam design strategies to enhance structural resilience. Additionally, robust column-to-column connections are recommended to prevent collapse under large deformations.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120146"},"PeriodicalIF":5.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685548","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":"A fractal dimension-modified stochastic damage model for bond-slip responses of corroded steel rebar embedded in different types of geopolymer concrete","authors":"Fangduo Xiao ,&nbsp;Wenxin Wang ,&nbsp;Junlong Yang ,&nbsp;Dongming Yan ,&nbsp;Yi Liu ,&nbsp;Shikun Chen ,&nbsp;Qiang Li","doi":"10.1016/j.engstruct.2025.120168","DOIUrl":"10.1016/j.engstruct.2025.120168","url":null,"abstract":"<div><div>The performance of reinforced concrete (RC) structures may experience significant deterioration in harsh environments, and geopolymer concrete becomes an alternative to ordinary Portland cement (OPC) concrete due to its high corrosion resistance. However, the interfacial bond behavior of steel rebar to geopolymer concrete may significantly vary, and hence totally 68 central pull-out specimens were tested to gain insight into this issue. Several potential influenced factors on bond behavior were systematically discussed, covering rebar type, concrete type, as well as corrosion degree. Based on the test results, the calculated fractal dimension is found to be significant for the corroded rebar embedded in geopolymer concrete, indicating that more uniform corrosion occurred under this scenario. Furthermore, geopolymer concrete can provide a strong chemical adhesion at the bond interface, leading to a conspicuous enhancement of the bond strength. The interfacial chemical adhesion, however, tends to be damaged by the corrosion effect, and more significant bond deterioration is detected with the increase in corrosion degree for slag-based geopolymer (SG) and metakaolin-based geopolymer (MKG) specimens. Nevertheless, the corrosion extent as well as the bond deterioration can be alleviated to some extent by using hydrophobic metakaolin-based geopolymer (HMKG) concrete. Based on the stochastic damage theory, a spring system is assumed to describe the stochasticity of bond-slip responses, and a new model is proposed with the consideration of the corrosion degree and fractal dimension. The proposed model can provide desirable predictions for the bond strength and bond-slip responses of corroded rebar to different types of concrete.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120168"},"PeriodicalIF":5.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696053","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":"Response spectrum calculation method for liquid storage structure subjected to ground shock","authors":"Haotian Zhang ,&nbsp;Chunming Song ,&nbsp;Jiahe Zhong ,&nbsp;Yang Jiang ,&nbsp;Mingyang Wang","doi":"10.1016/j.engstruct.2025.120183","DOIUrl":"10.1016/j.engstruct.2025.120183","url":null,"abstract":"<div><div>The protective performance of liquid storage structures (LSSs) is intrinsically linked to the safety reserves of strategic resources, necessitating the development of a simplified calculation framework to assess their dynamic responses to ground shock resulting from explosions. Utilizing a two-dimensional generalized single-degree-of-freedom theoretical model in conjunction with seismic response spectrum theory, this study proposes a methodology for calculating the response spectrum associated with the effects of explosion-induced ground shock on LSSs, taking into account various explosion parameters. The validity of this calculation method is substantiated through model tests conducted on an explosion shock and vibration simulation platform. This approach enables the determination of maximum values for structural displacement, velocity, acceleration, shear force, and bending moment. Furthermore, the introduction of intermediate coefficients and corresponding value tables streamlines the computation of essential dynamic characteristic parameters, thereby enhancing the practicality for engineering calculations. The calculation process for assessing the effects of the ground shock on LSSs is presented, accompanied by an analysis of a specific case study. The findings indicate that the ground shock poses a greater risk of inducing significant deformation in LSSs compared to natural ground motion, particularly in low-period structures.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120183"},"PeriodicalIF":5.6,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143696054","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":"Semi-analytical dynamic modeling and vibration analysis of double cylindrical shell structure based on the general bolted flange model","authors":"Dongxu Du ,&nbsp;Yaxiong Tian ,&nbsp;Wei Sun ,&nbsp;Honghao Liu ,&nbsp;Xiaofeng Liu ,&nbsp;Hui Zhang","doi":"10.1016/j.engstruct.2025.120027","DOIUrl":"10.1016/j.engstruct.2025.120027","url":null,"abstract":"<div><div>A general bolted flange model is proposed to improve the efficiency and applicability of the model for bolted connection shell structures. The bolted flange is taken as a sub-structure and simulated by a virtual material disk, and the disk is divided into bolt-affected region and non-bolt-affected region. The elastic modulus of the disk in the bolt-affected region obeys a specified function distribution (constant, sine and parabola distribution are adopted here, respectively) to accurately reflect the non-uniform distribution of pressure at the joint of bolts, thus forming a general model of the bolted flange. The general model not only retains the geometric features of the flange but also can be directly applied to the shell without depending on the deformation relationship between the shell and the bolted flange structure, which improves the model accuracy and efficiency. Furthermore, based on Kirchhoff plate theory and Sanders’ shell theory, the free vibration equations of the virtual material disk and the left and right cylindrical shells are derived, and then the semi-analytical dynamic model of bolted flanged double cylindrical shells is established by integrating the three substructure models. Finally, an experimental system is set up to verify the rationality of the semi-analytical dynamic model of double cylindrical shell structure based on the general bolted flange model. The effects of the number of bolts, the pre-tightening force amplitude and the non-uniform pre-tightening of bolts at adjacent positions and cross positions on the natural characteristics of double cylindrical shell structure with bolted flange connection are investigated.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120027"},"PeriodicalIF":5.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685027","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":"Compressive behavior of circular and square concreted-filled steel tubular short columns after freeze-thaw cycles","authors":"Qin Gao ,&nbsp;JunHua Li ,&nbsp;Mengdi Huang ,&nbsp;Hyeon-Jong Hwang ,&nbsp;Su-Min Kang","doi":"10.1016/j.engstruct.2025.120172","DOIUrl":"10.1016/j.engstruct.2025.120172","url":null,"abstract":"<div><div>In recent years, performance of concrete-filled steel tubular (CFST) short columns under axial compression after freeze-thaw cycles has gained attention for its long-term durability in colder climates. In the present study, freeze-thaw cycle test was conducted on the square section CFST (S-CFST) short columns to evaluate the influence of steel tube wall thickness and sectional dimension on the axial compression resistance of S-CFST short columns after freeze-thaw cycles. The infilled concrete strength degradation model and the calculation model for the axial compression resistance of the circular and square section CFST (C-CFST and S-CFST) short columns that can comprehensively consider design factors, such as the number of freeze-thaw cycles, concrete strength, and steel tube wall thickness, are proposed. Also, a parametric study is conducted to evaluate the accuracy and rationality of the prediction results of the existing models for concrete strength degradation and axial compression resistance of CFST short columns after freeze-thaw cycles. The existing experimental data and model parameter analysis indicate that as the steel tube wall thickness and concrete strength increased, the detrimental effects of freeze-thaw cycles on the in-filled concrete and the axial compression resistance of CFST short columns diminished significantly. The proposed model showed good accuracy and stability for predicting the axial compression resistance of C-CFST and S-CFST short columns after freeze-thaw cycles, without limitation of material strength range and the number of freeze-thaw cycles. Further, the infilled concrete strength degradation model was applicable to current design code models for the axial compression resistance of CFST short columns under normal temperature conditions, which estimated the axial compression resistance of CFST short columns after freeze-thaw cycles.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"333 ","pages":"Article 120172"},"PeriodicalIF":5.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143685019","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}