Engineering Structures最新文献_第3页

Low-damage performance of rocking column bases with Belleville Springs for enhanced seismic resilience

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119906

Jiang-Yue Xie , Zhenduo Yan , Junrong Liu , Rui Zhang , Ping Xiang , Xianzhong Zhao , Gregory A. MacRae , G. Charles Clifton , Rajesh P. Dhakal , Shahab Ramhormozian , Geoffrey Rodgers , Pierre Quenneville , Liang-Jiu Jia

{"title":"Low-damage performance of rocking column bases with Belleville Springs for enhanced seismic resilience","authors":"Jiang-Yue Xie , Zhenduo Yan , Junrong Liu , Rui Zhang , Ping Xiang , Xianzhong Zhao , Gregory A. MacRae , G. Charles Clifton , Rajesh P. Dhakal , Shahab Ramhormozian , Geoffrey Rodgers , Pierre Quenneville , Liang-Jiu Jia","doi":"10.1016/j.engstruct.2025.119906","DOIUrl":"10.1016/j.engstruct.2025.119906","url":null,"abstract":"<div><div>This paper investigates the low-damage performance of strong axis-aligned asymmetric friction connection (SAFC) column bases, with a focus on enhancing seismic resilience through the incorporation of Belleville Springs (BeSs). Cyclic loading tests were performed along the strong axis of the column, considering three cases: <em>INITIAL</em> (as-built), <em>AFTERSHOCK</em> (post-testing without repair), and <em>REPAIR</em> (restored condition via bolt re-tightening or replacement), with a maximum drift of 3 %. In the absence of BeSs, the column base exhibited a 22.9 % reduction in initial rotational stiffness and a 13.6 % decrease in ultimate moment resistance in the <em>AFTERSHOCK</em> case. However, the use of BeSs maintained the bolts within the elastic range, resulting in near-identical hysteretic behavior across all cases, with losses in stiffness and strength remaining within 7 %. Both column base configurations, with and without BeSs, exhibited satisfactory performance restoration in the <em>REPAIR</em> case. A finite element analysis (FEA) model was developed to quantitatively evaluate the low-damage performance, sliding behavior, bolt pre-tension loss, and energy dissipation of the column base. The findings showed that BeSs improved seismic resilience by mitigating bolt pre-tension loss and minimizing plastic deformation. Finally, a simplified flag-shaped hysteretic model was proposed and validated through test results.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119906"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437917","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}

引用次数: 0

Finite element modelling of concrete-filled double-skin steel stiffened tubular chord-to-SHS steel brace T-joints: Behaviour and design

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119858

Yan Diao , Jun Wang , Hongzhi He , M.F. Hassanein , Yong-Bo Shao , K.A. Cashell , A.Y. Elghazouli

{"title":"Finite element modelling of concrete-filled double-skin steel stiffened tubular chord-to-SHS steel brace T-joints: Behaviour and design","authors":"Yan Diao , Jun Wang , Hongzhi He , M.F. Hassanein , Yong-Bo Shao , K.A. Cashell , A.Y. Elghazouli","doi":"10.1016/j.engstruct.2025.119858","DOIUrl":"10.1016/j.engstruct.2025.119858","url":null,"abstract":"<div><div>Although concrete-filled double-skin stiffened steel tubular (CFDSST) members have been researched and applied in recent years, their use in truss T-joints has been lacking. This paper therefore examines the mechanical behaviour of CFDSST chord-to-hollow steel section (SHS) brace T-joints under axial brace loading. Detailed finite element models for CFDSST-to-SHS T-joints are firstly validated by assessing the modelling approaches against recent tests for CFDSST columns and other types of T-joints. The models are subsequently used to conduct parametric assessments into the influence of key factors, including the brace-to-chord width ratio, brace-to-chord thickness ratio, material strengths, hollow ratio of CFDSST chord, and the axial load applied on the chord. It is shown that the ultimate load capacity of the T-joints increases with the increase in the brace-to-chord width ratio as well as with higher steel tube and sandwiched concrete material strength, with a much less pronounced influence from the brace-to-chord thickness ratio. A new parameter representing the flexural stiffness-to-member length ratio of the chord to the brace is also introduced, based on which the failure modes are separated into two categories related to either the failure of the brace or of the chord. Using the detailed results and observations, existing methods for determining the bearing capacities of T-joints are evaluated, leading to the development of a new design approach. The proposed design procedure is shown to provide accurate predictions for CFDSST-to-SHS T-joints, indicating its suitability for use in practical application.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119858"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437865","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}

引用次数: 0

Nonlinear hysteretic model of prefabricated pier-cap beam joint with CFST socket connection

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119908

Zhixin Zhu , Guangda Zhang , Qiang Han , Zhipeng Li , Li Xu , Xiuli Du

{"title":"Nonlinear hysteretic model of prefabricated pier-cap beam joint with CFST socket connection","authors":"Zhixin Zhu , Guangda Zhang , Qiang Han , Zhipeng Li , Li Xu , Xiuli Du","doi":"10.1016/j.engstruct.2025.119908","DOIUrl":"10.1016/j.engstruct.2025.119908","url":null,"abstract":"<div><div>Concrete-filled steel tube possesses excellent mechanical properties and has been gaining increasing attention for its application in prefabricated pier-cap beam joints with socket connections. To comprehensively investigate the nonlinear force-displacement relationship of the prefabricated pier-cap beam joint with concrete-filled steel tube socket connection under cyclic loading, this paper first developed a mechanical analysis model for the joint. The deformation equation of the socket connection segment was derived based on Timoshenko beam theory, resulting in the establishment of the skeleton curve model for the joint. Additionally, the finite element model of the joint was developed to analyze the parameters and fit the unloading stiffness equation of the joint. The nonlinear hysteresis model of the joint was ultimately established by incorporating the hysteresis rule accounting for the pinching effect. The model accurately represented the joint’s force-displacement relationship under cyclic loading, thereby providing theoretical support for the application of the joints in medium and high seismic regions.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119908"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437899","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}

引用次数: 0

Revealing critical failure laws of composite curved beams through network-free renormalization and clustering algorithm

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119857

Zijie Shen , Xionghui Zou , Changfu Hu , Weicheng Gao , Wei Liu , Guangchun Zhou , Zhenyu Wu

{"title":"Revealing critical failure laws of composite curved beams through network-free renormalization and clustering algorithm","authors":"Zijie Shen , Xionghui Zou , Changfu Hu , Weicheng Gao , Wei Liu , Guangchun Zhou , Zhenyu Wu","doi":"10.1016/j.engstruct.2025.119857","DOIUrl":"10.1016/j.engstruct.2025.119857","url":null,"abstract":"<div><div>Curved beams are irregular composite structures commonly used in aircraft and ships. The complexity of their material properties and irregular geometries make it challenging to define their failure accurately based on the failure phenomenon. Moreover, few full-size composite laminate curved beam tests have been reported in previous publications because of their high cost and difficulty. This work proposes a 3-order network-free renormalization method based on the thermodynamic-based failure definition to reveal the failure law of curved beams more accurately, which is suitable for characterizing the stressing state of full-size irregular composite structures. Applying 3-order network-free renormalization and clustering algorithms to eight full-size composite curved beams can reveal the elastoplastic branching (EPB), failure starting (FS), and progressive failure (PF) points. We can also use the phase transition definition of Wilson's theory to verify the stability of phase transition loads. Unlike failure loads based on buckling or fracture phenomena, phase transition loads in composite curved beams are based on catastrophes in the relative deformation distribution, which is more physically significant.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119857"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437864","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}

引用次数: 0

Finite element analysis and design of triple grades hybrid high-performance steel structure (TGHSS)

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119909

Jiaying Huang , Huatian Zhao , Yang Gao , Gang Shi

{"title":"Finite element analysis and design of triple grades hybrid high-performance steel structure (TGHSS)","authors":"Jiaying Huang , Huatian Zhao , Yang Gao , Gang Shi","doi":"10.1016/j.engstruct.2025.119909","DOIUrl":"10.1016/j.engstruct.2025.119909","url":null,"abstract":"<div><div>The triple grades hybrid high-performance steel structure (TGHSS) is an innovative structural system comprising ordinary strength steel beams, high strength steel (HSS) columns, and low yield point (LYP) steel buckling-restrained braces (BRBs). Previous experimental and numerical studies have revealed the excellent seismic behaviour of TGHSSs. In this study, nonlinear analyses were conducted to investigate the structural performance of TGHSSs, including their load-bearing and deformation capacities, capacity reserves, plastic development, and dynamic responses. A conventional buckling-restrained braced frame (CBRBF) with all components based on ordinary strength steel was designed for comparison. Generally, TGHSSs have 8.4 %–12 % higher load-bearing capacity, 34 %–35 % higher deformation capacity, 11 % increased ductility reserve, and 71 % increased resistance reserve. Likewise, TGHSSs feature a smaller response modification factor <em>R</em>, indicating a larger design base shear. Through strategic balancing of steel grades in different components, TGHSSs can achieve improved seismic behaviours, including enhanced structural capacity, relieved plastic development, and suppressed dynamic responses. An effective performance-based design method is proposed with recommended performance factor <em>Ω</em> and material overstrength factor <em>η</em><sub>y</sub> to achieve capacity design among components.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119909"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444661","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}

引用次数: 0

Wind field characterization with skip-connected variational autoencoder for data cleaning under deck disturbance effects

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119905

Nanxi Chen , Guilin Liu , Rujin Ma , Airong Chen , Yufan Bai , Donghao Guo

{"title":"Wind field characterization with skip-connected variational autoencoder for data cleaning under deck disturbance effects","authors":"Nanxi Chen , Guilin Liu , Rujin Ma , Airong Chen , Yufan Bai , Donghao Guo","doi":"10.1016/j.engstruct.2025.119905","DOIUrl":"10.1016/j.engstruct.2025.119905","url":null,"abstract":"<div><div>Accurate characterization of wind fields is essential for effectively analyzing wind-induced responses of long-span bridges. However, field measurements often suffer from severe anomalies, compromising their reliability. One significant cause of these anomalies is the disturbances induced by the bridge deck. This study aims to eliminate the effects of such disturbances on the measured data and wind field characteristics. We begin with a comparative analysis of disturbed versus undisturbed wind measurements. To remove the disturbance effects and clean the data, we introduce a novel skip-connected variational autoencoder (SVAE) neural network that can effectively reconstruct undisturbed data from disturbed measurements. The SVAE is trained on a dataset comprising both disturbed and undisturbed measurements collected during strong wind events and is validated against other generative models based on reconstruction accuracy. We then employ the trained SVAE to clean measurements from another event and analyze wind field characteristics such as mean wind speed, turbulence intensity, integral scale of turbulence, and power spectral density from the reconstructed data. Our findings confirm the effectiveness of this approach, suggesting its broader applicability in ensuring the accuracy and reliability of wind field characterizations and subsequent analyses of wind-induced responses on long-span bridges.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119905"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437866","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}

引用次数: 0

Seismic response of geostructures to obliquely incident pulse-type near-fault P and SV waves

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119917

Hamid Mohammadnezhad , Shayan Zare Bidaki , M. Amin Hariri-Ardebili , Majed Noorbakhsh-Saleh

{"title":"Seismic response of geostructures to obliquely incident pulse-type near-fault P and SV waves","authors":"Hamid Mohammadnezhad , Shayan Zare Bidaki , M. Amin Hariri-Ardebili , Majed Noorbakhsh-Saleh","doi":"10.1016/j.engstruct.2025.119917","DOIUrl":"10.1016/j.engstruct.2025.119917","url":null,"abstract":"<div><div>The assumption of vertical propagation for near-fault ground motions is often inadequate. Such ground motions produce pulse-like excitation with forward-directivity effects. This paper investigates the response of a geostructure (i.e., coupled dam-foundation-reservoir system) to near-fault pulse-like ground motions characterized by P and SV waves, including both symmetric and anti-symmetric pulses. Seismic wave propagation is simulated using a semi-analytical method in conjunction with the domain reduction method. The analysis encompasses equivalent pulses generated by modified Gabor wavelets and real near-fault ground motions with varied frequency content and pulse types. This paper further considers post-critical incident angles and inhomogeneous wave propagation. Over 800 transient simulations are conducted. To generalize the outcome, variability in pulse type, wave type, incident angle, number of pulse cycles, frequency content, pulse amplitude, and pulse period are assessed. Moreover, a series of sensitivity analyses are conducted to evaluate the elasticity ratio of super-structure to foundation, and structure-to-pulse period ratio. The results demonstrate a significant impact of most these parameters on the dynamic response of the system. The maximum response under SV waves is observed just beyond the critical angle, with results showing a 20%–60% increase over the vertical propagation case. For P waves, the normalized response with respect to the vertical propagation case may be up to 3.6 times at a 70-degree angle. The findings underscore the necessity of considering oblique pulse-type ground motions in seismic risk analysis of geostructures within near-fault zones.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119917"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437867","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}

引用次数: 0

Automated machine learning exact dirichlet boundary physics-informed neural networks for solid mechanics

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119884

Xiaoge Tian , Jiaji Wang , Chul-Woo Kim , Xiaowei Deng , Yingjie Zhu

{"title":"Automated machine learning exact dirichlet boundary physics-informed neural networks for solid mechanics","authors":"Xiaoge Tian , Jiaji Wang , Chul-Woo Kim , Xiaowei Deng , Yingjie Zhu","doi":"10.1016/j.engstruct.2025.119884","DOIUrl":"10.1016/j.engstruct.2025.119884","url":null,"abstract":"<div><div>While Physics-informed neural networks (PINN) have made significant progress in solving partial differential equations (PDE), conventional PINN may have convergence issues due to spectral bias, the requirement of loss balancing, and a significant number of trainable weights. Exact Dirichlet boundary condition Physics-informed Neural Networks (EPINN) was developed to solve forward problems in solid mechanics by applying tensor decomposition, approximating distance function, and the principle of least work, achieving more than 127 times speedup compared to PINN. However, the sensitivity of hyperparameters of the PINN framework is less reported. To merge the gap, this study develops the mesh-free 3D Bayesian-Optimization Tree-Structured Parzen Estimator (BO-TPE) Automated Machine Learning EPINN to solve solid mechanics problems without labelled data of the solution field. Developed based on Nvidia modulus platform, the Automated Machine Learning EPINN (AEPINN) can achieve more than 20 times speedup for 2D plane stress problems and four times speedup for 3D bracket problems compared with the EPINN architecture. Compared with conventional PINN, AEPINN model achieved more than 200 times speedup for a plane stress problem and 400 times speed up for a bracket problem. For a two-span three-story frame composed of beams, columns, and slabs, the AEPINN model can simulate the frame displacement deformations comparable to ABAQUS results with adequate accuracy and speed with GPU accelerated. Optimized hyperparameters AEPINN can approach a hyperelastic cube rubber case within 60 s compared with Abaqus results of Mooney-Rivlin constitutive law. The comparison between single-precision and double-precision training is also illustrated. The influences of hyperparameters in the adopted EPINN framework are examined accordingly.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119884"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444662","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}

引用次数: 0

A hybrid domain adaptation approach for estimation of prestressed forces in prestressed concrete bridges under moving vehicles

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119904

Saeid Talaei , Xinqun Zhu , Jianchun Li , Yang Yu , Tommy H.T. Chan

{"title":"A hybrid domain adaptation approach for estimation of prestressed forces in prestressed concrete bridges under moving vehicles","authors":"Saeid Talaei , Xinqun Zhu , Jianchun Li , Yang Yu , Tommy H.T. Chan","doi":"10.1016/j.engstruct.2025.119904","DOIUrl":"10.1016/j.engstruct.2025.119904","url":null,"abstract":"<div><div>Ensuring the accurate and reliable estimation of prestressed forces (PFs) in prestressed concrete bridges is vital for operational performance and public safety. Traditional vibration-based methods often face challenges when applied to real-world scenarios. In this study, a novel hybrid domain adaptation approach is proposed to predict the prestressed force of prestressed concrete bridges under moving vehicles. The finite element model for Vehicle-Bridge Interaction (VBI) systems is established and validated using the experimental results. This validated model is then used to generate a synthetic training dataset of the source domain. Continuous Wavelet Transform (CWT) is employed for feature extraction from VBI acceleration responses, capturing their time-frequency properties. Preliminary feature extraction is enhanced through the use of a pre-trained AlexNet network. Following this initial step, a novel hybrid domain adaptation (DA) approach is applied to close the gap between the synthetic and real-world data. Specifically, Maximum Mean Discrepancy (MMD) and adversarial DA techniques are synergistically combined. Three types of loss functions are incorporated: Regression Loss for precise force prediction, MMD Loss to align the synthetic and real-world data domains, and Adversarial Loss to ensure domain invariance. The effects of uncertainties in VBI system, such as errors of the bridge length, flexural rigidity, density, damping, boundary conditions, errors of the vehicle model and moving speed and road surface roughness, have been discussed. The results indicate that the integrated approach effectively mitigates the challenges posed by domain shift, enabling robust and reliable predictions of PFs in actual bridge structures. The finding of this study offers a comprehensive, data-driven solution with significant implications for the future of structural health monitoring and bridge condition assessment.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119904"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444663","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}

引用次数: 0

Seismic performance of precast double-column rocking piers with U-shaped tendons and stiffening steel shoes: Experimental and numerical study

IF 5.6 1区工程技术

Engineering Structures Pub Date : 2025-02-19 DOI: 10.1016/j.engstruct.2025.119894

Haiqiang Zhong , Junjun Guo , Xinzhi Dang , Xiaowei Deng , Wancheng Yuan , Zhiqiang Wang

{"title":"Seismic performance of precast double-column rocking piers with U-shaped tendons and stiffening steel shoes: Experimental and numerical study","authors":"Haiqiang Zhong , Junjun Guo , Xinzhi Dang , Xiaowei Deng , Wancheng Yuan , Zhiqiang Wang","doi":"10.1016/j.engstruct.2025.119894","DOIUrl":"10.1016/j.engstruct.2025.119894","url":null,"abstract":"<div><div>Rocking piers exhibit promising seismic resistance and are suitable for precast bridges. However, their application to engineering practice, especially the widely used double-column piers, is hindered by the difficulty in operating prestressed tendons, protecting rocking toes, and achieving a satisfactory design. Hence, this study proposes novel fully-arranged U-shaped tendons, partially-arranged U-shaped tendons, and stiffening steel shoes for precast double-column rocking piers to improve the seismic performance and facilitate the construction and maintenance. Cyclic tests were conducted on two scaled specimens, both employing steel shoes, with one specimen equipped with a fully-arranged U-shaped tendon and the other with straight tendons and partially-arranged U-shaped tendons. Then, numerical models were established and validated. Finally, a comparative study was performed to investigate the influences of the U-shaped tendons and steel shoes on the pier performance. The test results show that both specimens behaved as typical low-damage rocking piers and ultimately failed due to extensive fractures of the steel shoes. The comparative study illustrates that the steel shoes can significantly protect the rocking toes, and that the fully-arranged U-shaped tendons can replace the ordinary straight tendons, while the partially-arranged ones can effectively enhance the longitudinal pier capacity without excessively impairing the transverse performance.</div></div>","PeriodicalId":11763,"journal":{"name":"Engineering Structures","volume":"330 ","pages":"Article 119894"},"PeriodicalIF":5.6,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437900","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}

引用次数: 0