Thin-Walled Structures最新文献_第9页

Stability behaviour and design approach of reinforced concrete-filled corrugated steel tubular slender columns under axial compression

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-05 DOI: 10.1016/j.tws.2025.113165

Hua Yang , Shichao Yan , Yong Fang , Ligui Yang

{"title":"Stability behaviour and design approach of reinforced concrete-filled corrugated steel tubular slender columns under axial compression","authors":"Hua Yang , Shichao Yan , Yong Fang , Ligui Yang","doi":"10.1016/j.tws.2025.113165","DOIUrl":"10.1016/j.tws.2025.113165","url":null,"abstract":"<div><div>Reinforced concrete-filled thin-walled galvanized corrugated steel tube (RCFCST) is a new type of composite member with competitive mechanical behaviour, durability and construction convenience. In practice, RCFCST members with large slenderness ratios typically undergo overall stable failure, which needs special attention and reliable design methods. However, no existing design methods can directly ascertain the stability-bearing capacity of slender columns. This study delves into the compressive stable behaviour of large-scale slender RCFCST members, focusing on two key test variables, i.e., slenderness ratios and specimen types. The failure modes, deformation characteristics, axial load-deflection curves, and strain development have been meticulously addressed. Based on the experimental findings in this study, a fibre-based model for RCFCST members is proposed and validated. A systematic parametric analysis has been conducted to further explore the influence of geometrical and mechanical parameters on the stability-bearing capacity. Ultimately, a design approach for determining the compressive stability-bearing capacity of slender RCFCST members is proposed and verified.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113165"},"PeriodicalIF":5.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610722","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

Multi-frequency superposed vortex-induced vibration modeling based on multiple Fourier features physics-informed neural network

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-05 DOI: 10.1016/j.tws.2025.113159

Ting Zhang, Rui Yan, Siqian Zhang, Dingying Yang, Changxun Zhan

{"title":"Multi-frequency superposed vortex-induced vibration modeling based on multiple Fourier features physics-informed neural network","authors":"Ting Zhang, Rui Yan, Siqian Zhang, Dingying Yang, Changxun Zhan","doi":"10.1016/j.tws.2025.113159","DOIUrl":"10.1016/j.tws.2025.113159","url":null,"abstract":"<div><div>In scenarios involving coupled excitations from multiple forces, structures exhibit complex vibrational patterns with superimposed high and low-frequency. This is particularly evident in thin-walled structures such as submarine pipelines, where the coupling of internal and external flows leads to more intricate superimposed vibrations compared to scenarios with only internal flow excitation. However, neural networks encounter challenges in capturing these superimposed vibrations due to inherent spectral bias. To address this, the multiple Fourier features physics-informed neural network (MFF-PINN) is proposed. Through multiple Fourier mappings for refined multi-scale and multi-frequency decomposition, facilitating PINN in accurately capturing multi-frequency superposed vibrations. Additionally, the correspondence between hyperparameters and eigenvector frequencies is established, while the effects of different hyperparameters and number of mappings on the network is analyzed. The MFF-PINN with multiple mapping decomposition outperforms single mapping in synchronizing the learning of high and low-frequency, improving convergence speed and enhancing the ability to handle multi-frequency superposition. It provides an effective solution for modeling and simulating multi-frequency superposed problems in science and engineering.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113159"},"PeriodicalIF":5.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593966","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

Analysis on distortion effect of twin-cell box girders with inclined side webs based on finite beam-segment element

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-05 DOI: 10.1016/j.tws.2025.113137

Yanhong Wei, Yuanhai Zhang

{"title":"Analysis on distortion effect of twin-cell box girders with inclined side webs based on finite beam-segment element","authors":"Yanhong Wei, Yuanhai Zhang","doi":"10.1016/j.tws.2025.113137","DOIUrl":"10.1016/j.tws.2025.113137","url":null,"abstract":"<div><div>The conventional methods for analyzing the distortion effect of box girders cannot provide a practical formula for calculating the distortional moment of inertia of twin-cell box section (TCBS) with inclined side webs (ISW), which causes significant inconvenience in engineering design. Therefore, an explicit formula for determining the distortional moment of inertia was proposed firstly in this study based on flexural analysis of a unit-length frame with geometry of the box section. Then a distortional governed differential equation was established by applying the energy variation principle, and a homogeneous solution to the equation was derived. Subsequently, the solution was utilized as a distortional displacement interpolation function to establish a finite beam-segment element formulation for analyzing the distortion effect of continuous box girder bridges with variable depth, and a finite beam-segment element program (FBEP) was developed using the FORTRAN language. Moreover, the reliability of the formula and the FBEP was validated by comparison with the available experimental data, Shell finite element (Shell FE) analysis results, and results provided by the peers. Finally, the distortion effect of a practical twin-cell three-span continuous box girder bridge with variable depth and inclined side webs was analyzed using the FBEP, when the bridge is subjected to the lane load specified in Chinese specifications. The results show that the distortion effect caused by the two-lane load is most remarkable, when the width of bridge deck can only accommodate three lanes. The main span of the bridge should be designed according to three-lane load, whereas the design of side spans should consider the most unfavorable condition caused by either two-lane load or three-lane load. In addition, the FBEP can also serve as an effective tool for determining the distortional warping normal stress amplification factor and making a preliminary estimate to the numbers of diaphragms.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113137"},"PeriodicalIF":5.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143579137","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

Analytical solution for nonlinear dynamics of a rotating wind turbine blade under aerodynamic loading and yawed inflow effects

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-05 DOI: 10.1016/j.tws.2025.113164

M.M. Rezaei , H. Zohoor , H. Haddadpour

{"title":"Analytical solution for nonlinear dynamics of a rotating wind turbine blade under aerodynamic loading and yawed inflow effects","authors":"M.M. Rezaei , H. Zohoor , H. Haddadpour","doi":"10.1016/j.tws.2025.113164","DOIUrl":"10.1016/j.tws.2025.113164","url":null,"abstract":"<div><div>This paper investigates the nonlinear dynamics of a wind turbine blade using an analytically based perturbation approach. The rotating blade, which experiences significant deflection under operational loading, is subjected to harmonic excitation effects caused by yawed inflow conditions. The geometrically exact formulation of the rotating beam is employed for the structural modeling of the blade. The structural nonlinearities up to the cubic order, including coupled flapwise, edgewise, and torsional terms, are considered. The obtained governing equation, re-expanded around the steady state deformed configuration, is converted into a set of ordinary differential equations (ODEs) using the Galerkin approach. In this method, the mode shapes of the cantilevered blade are employed as trial functions. The analytical perturbation approach, based on the multiple scales method, is then applied to derive the modulation amplitude equation for the blade's steady-state response. The problem is solved under the super-harmonic resonance condition. Simulation results are obtained using the specification of the state-of-the-art 5MW-NREL wind turbine blade. After verifying the analytical method through comparison with the numerical approach, the blade response is investigated for various parameters, including structural damping, the yawed inflow angle, excitation frequency deviation, and the blade pre-cone angle. The results demonstrate the high accuracy of the analytical approach and the significant influence of geometric nonlinearities. Additionally, variations in these parameters lead to changes in the dynamic stability status, including instability occurrence, which results in specific bifurcation points in the blade's steady-state response.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113164"},"PeriodicalIF":5.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593968","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

Full-scale impact test and high-fidelity numerical simulation of typical civil transport aircraft

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-05 DOI: 10.1016/j.tws.2025.113147

Xulong Xi , Xiaochuan Liu , Chunyu Bai , Xinyue Zhang , Xiaocheng Li , Hezhao Han , Pu Xue , Jialing Yang , Xianfeng Yang

{"title":"Full-scale impact test and high-fidelity numerical simulation of typical civil transport aircraft","authors":"Xulong Xi , Xiaochuan Liu , Chunyu Bai , Xinyue Zhang , Xiaocheng Li , Hezhao Han , Pu Xue , Jialing Yang , Xianfeng Yang","doi":"10.1016/j.tws.2025.113147","DOIUrl":"10.1016/j.tws.2025.113147","url":null,"abstract":"<div><div>Impact response and crashworthiness design of civil aircraft structures are of paramount importance in avoiding major damage to aircraft structures and severe injury to the passengers. However, existing studies mainly focus on the crash responses and energy absorption design of element-level or component-level aircraft structures while limited impact response data of full-scale civil aircraft is reported up to now. In this work, a full-scale impact test of typical civil transport aircraft was conducted by a full-scale crash testing system. The structural responses, dummy responses and the ground impact load were obtained by the force and acceleration sensors, the high-speed camera system, full-field DIC deformation measurement methods. The testing results show that sub-cabin floor structures experience seriously deformation and upper-fuselage structures in the central wing area appear distinct deformation due to the inertia effect of the wing. The stiffness difference of various fuselage sections results in significant differences in the crash load and dynamic responses. Besides, finite element models of the full-scale civil transport aircraft were developed by using the explicit nonlinear finite element code Ls-Dyna. The simulation results of the full-scale aircraft are in good agreement with the testing responses in terms of structural responses and the ground impact load. Besides, a parametric analysis by using numerical simulations was carried out to investigate the influence of the pitch angle and the roll angle on impact responses of the full-scale civil transport aircraft. The results may enlighten the understanding of the crash response of full-scale civil transport aircraft which can fill the gaps in the building block approach of the crashworthiness design and provide fundamental experimental data for future energy absorption design.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113147"},"PeriodicalIF":5.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610724","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

Energy conversions based on hyperelastic deformation behaviors for enhanced load reduction in water entry

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-05 DOI: 10.1016/j.tws.2025.113156

Liu Yang , Taiping Zhang , Quan Zhang , Huifeng Kang , Guangqing Xia

{"title":"Energy conversions based on hyperelastic deformation behaviors for enhanced load reduction in water entry","authors":"Liu Yang , Taiping Zhang , Quan Zhang , Huifeng Kang , Guangqing Xia","doi":"10.1016/j.tws.2025.113156","DOIUrl":"10.1016/j.tws.2025.113156","url":null,"abstract":"<div><div>Vehicles face significant risks of structural damage and instability during water entry, emphasizing the need for effective load reduction to ensure success. Existing rigid devices have limitations in load capacity and stability. This paper proposes using a hyperelastic material with excellent impact resistance and resilience. Upon free surface impact, hyperelastic bodies deform, storing impact energy as strain energy to reduce load. Once in the water, they recover shape, converting strain energy to kinetic energy, aiding media transition. However, significant deformation and recovery lead to complex multiphase flows and structural responses, posing challenges in fully understanding the load reduction mechanisms. During impact load reduction, the energy conversion mechanisms based on deformation behavior are elucidated. In water, the fluid-structure coupling characteristics, including cavity flows, energy recovery, and elastic wave propagation resulting from the deformation of the cylinder, are investigated. Furthermore, a range of hyperelastic materials with enhanced energy conversion efficiency and unloading performance are identified.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113156"},"PeriodicalIF":5.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143577492","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

Data-driven reliability design of transverse impacted concrete-filled steel tube columns

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-05 DOI: 10.1016/j.tws.2025.113163

Nan Xu, Yanhui Liu, Hongjin Chen, Yonghe Shi

{"title":"Data-driven reliability design of transverse impacted concrete-filled steel tube columns","authors":"Nan Xu, Yanhui Liu, Hongjin Chen, Yonghe Shi","doi":"10.1016/j.tws.2025.113163","DOIUrl":"10.1016/j.tws.2025.113163","url":null,"abstract":"<div><div>There is an elevated likelihood that concrete-filled steel tube columns will be struck by transverse vehicle collisions together with the global acceleration of traffic and urbanization. This work intends to implement data-driven techniques to determine column deformation and quantify column damage upon lateral impact. Six novel machine learning models (gaussian process regression, support vector regression, least-squares boosting regression, multilayer perceptron, decision trees and random forests) were incorporated alongside Bayes optimization based on 351 samples. With a predicted deflection correlation of 0.93, least-squares boosting regression delivered the strongest training effect comprehensively. The SHapley Additive exPlanations approach was adopted to further foster user trust and comprehension. The first seven features were examined via parameter investigation according to feature importance ranking, results suggested that the best strategy for reducing lateral deformation is boosting steel tube thickness and outer diameter along the gradient downwards of deformable contour map. A reliability-based design procedure that serves as an appropriate guideline for impact protection was laid out by Monte Carlo sampling to determine failure probability of three damage levels in concrete-filled steel tube columns.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113163"},"PeriodicalIF":5.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593965","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

Non-alignment effects on the frequency behaviors of sandwich stepped cylindrical shells with auxetic 3D-ARCS core

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-05 DOI: 10.1016/j.tws.2025.113162

Ali Heidari-Soureshjani , Esmail Asadi , Roohollah Talebitooti , Mostafa Talebitooti

{"title":"Non-alignment effects on the frequency behaviors of sandwich stepped cylindrical shells with auxetic 3D-ARCS core","authors":"Ali Heidari-Soureshjani , Esmail Asadi , Roohollah Talebitooti , Mostafa Talebitooti","doi":"10.1016/j.tws.2025.113162","DOIUrl":"10.1016/j.tws.2025.113162","url":null,"abstract":"<div><div>The present paper focuses on the frequency behavior of sandwich auxetic stepped cylindrical shells with non-aligned mid-surfaces, incorporating three-dimensional augmented re-entrant cellular structures (3D-ARCS) in the core layer. In real-world applications, the radial arrangement of 3D-ARCS in the core layer increases the shell's thickness, necessitating the use of three-dimensional elasticity theory to accurately capture through-thickness stress and strain distributions. Furthermore, this theory facilitates the satisfaction of both radial and meridional continuity at adjacent layers, enabling the creation of an integrated, seamless multi-segmented structure without resorting to simplifications. The effective material properties of the 3D-ARCS core are derived using classical beam theory and a representative unit cell model. Altering the geometric parameters of the 3D-ARCS can modify the effective properties and provide frequency diversity. This research also investigates a specific type of external stepped cylindrical shell that is applicable in mechanical, aerospace, and civil engineering industries. This structure features an auxetic cylindrical shell integrated with a circular flange composed of a bottom face sheet with a functionally graded ceramic-steel material. The validity of the two-directional generalized differential quadrature (2D-GDQ) results is confirmed through experimental testing on a simplified isotropic model, FEM model of a 3D-ARCS auxetic sandwich cylindrical shell, and relevant research. Subsequently, the effects of several key parameters are studied.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"212 ","pages":"Article 113162"},"PeriodicalIF":5.7,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601065","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

Assessment of the effects of wind loading due to climate change on the reliability of steel pitched-roof portal frames

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-04 DOI: 10.1016/j.tws.2025.113141

Milena Janković, Filip Ljubinković, Helena Gervásio, Luís Simões da Silva

引用次数: 0

Ayrton-Perry approach for the lateral-torsional buckling resistance of mono-symmetric I-section beams

IF 5.7 1区工程技术

Thin-Walled Structures Pub Date : 2025-03-04 DOI: 10.1016/j.tws.2025.113125

L. Simões da Silva , J.O. Gomes Jr. , J.O. Ferreira Filho , H. Carvalho

{"title":"Ayrton-Perry approach for the lateral-torsional buckling resistance of mono-symmetric I-section beams","authors":"L. Simões da Silva , J.O. Gomes Jr. , J.O. Ferreira Filho , H. Carvalho","doi":"10.1016/j.tws.2025.113125","DOIUrl":"10.1016/j.tws.2025.113125","url":null,"abstract":"<div><div>The Ayrton-Perry approach is the base of the Eurocode 3 design rules for the verification of the buckling resistance of prismatic members, in which different buckling curves associated to different imperfection factors are suggested according to the sections, steel grades, and other parameters. In the revised version of Eurocode 3, the lateral-torsional buckling resistance of simply-supported doubly-symmetric I-section beams is prescribed using a formulation based on the Ayrton-Perry approach and combined with a calibrated generalized imperfection. However, for mono-symmetric I-beams, the General Case predicted in the last version of Eurocode 3 has been maintained, which results in large scatter and an inconsistent design. This paper extends the new Ayrton-Perry approach available in the new version of Eurocode 3 to deal with simply supported mono-symmetric I-section beams under different loading conditions. An advanced numerical model is built and validated to conduct a reliable parametric study in order to assess the available design methodologies and the proposed extended formulation. It is concluded that the proposed formulation exhibits safe-sided results which better agreement with experimental results and advanced numerical simulations, providing more economic and sustainable solutions for mono-symmetric members.</div></div>","PeriodicalId":49435,"journal":{"name":"Thin-Walled Structures","volume":"211 ","pages":"Article 113125"},"PeriodicalIF":5.7,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534293","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