International Journal of Steel Structures最新文献_第9页

Safety Evaluation of 5G Antenna Mounted on Power Transmission Towers Using a New Mounting Device Under Environmental Loads 使用新型安装装置对安装在输电塔上的 5G 天线进行环境负荷下的安全评估

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-22 DOI: 10.1007/s13296-024-00850-7

Gaoxin Wang, Weizhou Xu, Yashan Hu, Zengjun An

{"title":"Safety Evaluation of 5G Antenna Mounted on Power Transmission Towers Using a New Mounting Device Under Environmental Loads","authors":"Gaoxin Wang, Weizhou Xu, Yashan Hu, Zengjun An","doi":"10.1007/s13296-024-00850-7","DOIUrl":"10.1007/s13296-024-00850-7","url":null,"abstract":"<div><p>Mounting 5G antennas on existing power transmission towers can meet the needs of both power supply and 5G communication. Current mounting techniques have the problems of cumbersome process and slow efficiency. This research designs a new type of mounting device of 5G Antenna on power transmission towers. The components and the installation process of this mounting device are introduced, the stress behavior of the mounting device under self-weight load, ice load and wind load is studied through finite element analysis (FEA), and the safety of the mounting device under self-weight load, ice load and wind load is verified through experiments. Furthermore, the safety of power transmission towers is evaluated after 5G antenna is mounted under environmental loads. The results show that: (1) the wind load has the dominant effect on the 5G mounting device, and the proportion of stress caused by wind load is between 89–97%; (2) FEA and experiment show that all the stresses of the device components do not exceed the yield strength limit 355 MPa, indicating that the mounting device is safe to support the 5G antenna under gravity, ice load and wind load; (3) the displacements and stresses of power transmission towers will increase after 5G antenna is mounted, but the values do not exceed the limit, indicating that the power transmission towers are still safe for operation after 5G antenna is mounted.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"789 - 798"},"PeriodicalIF":1.1,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141110864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Displacement Range Based Fatigue Strength Verification of KR-Type Rail Clip 基于位移范围的 KR 型轨夹疲劳强度验证

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-22 DOI: 10.1007/s13296-024-00843-6

Yeun Chul Park, Hyoung-Bo Sim

引用次数: 0

Lateral Load Behavior Analysis of a Novel Self-Centering Y-Eccentrically Braced Frames with Slip Connection Shear Link 带有滑动连接剪力连杆的新型自定心 Y 型偏心支撑框架的横向荷载行为分析

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-22 DOI: 10.1007/s13296-024-00849-0

Moqiang Xiong, Shujun Hu, Xiang Li, Xuankun Lin, Jingang Xiong

{"title":"Lateral Load Behavior Analysis of a Novel Self-Centering Y-Eccentrically Braced Frames with Slip Connection Shear Link","authors":"Moqiang Xiong, Shujun Hu, Xiang Li, Xuankun Lin, Jingang Xiong","doi":"10.1007/s13296-024-00849-0","DOIUrl":"10.1007/s13296-024-00849-0","url":null,"abstract":"<div><p>Reducing residual deformation of shear links and enhancing structural self-centering performance are two effective strategies to optimize the seismic resilience of Y-eccentrically braced frames. Based on the aforementioned concepts, a novel self-centering Y-eccentrically braced frame structure which composing of self-centering joints and slip connection shear link was introduced in this study. Firstly, a design methodology for the slip connection shear link and anticipated mechanical properties of the novel structure were proposed through theoretical analyses. Subsequently, finite element models were established based on previous experimental data to investigate the lateral load behavior of the novel structure by comparing it with a conventional structure. The results indicate that when possessing sufficient lateral load capacity and energy dissipation capacity, the novel structure exhibits exceptional self-centering performance. Finally, the energy dissipation and self-centering mechanism were obtained by conducting stress analysis on substructures under various seismic conditions. The analysis results indicate that the slip connection mechanism effectively mitigates relative displacement and damage to shear links, restricts frame damage, and enhances structural self-centering performance when combined with self-centering joints.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"777 - 788"},"PeriodicalIF":1.1,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13296-024-00849-0.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141112447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Strength Analysis of Cellular Steel Members under Combined Compression and Major-Axis Bending 组合压缩和主轴弯曲下的蜂窝钢构件强度分析

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-20 DOI: 10.1007/s13296-024-00847-2

Voraphol Horsangchai, Worakarn Anuntasena, Akhrawat Lenwari

{"title":"Strength Analysis of Cellular Steel Members under Combined Compression and Major-Axis Bending","authors":"Voraphol Horsangchai, Worakarn Anuntasena, Akhrawat Lenwari","doi":"10.1007/s13296-024-00847-2","DOIUrl":"10.1007/s13296-024-00847-2","url":null,"abstract":"<div><p>Cellular steel shapes offer greater section depth and strong-axis flexural stiffness than their parent hot-rolled shapes, along with web openings for duct system installation. However, their use as structural members other than beams has been constrained by a lack of design guidelines. This research employs both an analytical approach and nonlinear finite element analysis to investigate the strength of cellular steel members under combined compression and major-axis bending. In the analytical approach, the strength interaction equation for cellular steel beam-columns incorporating an initial imperfection is derived using the principle of stationary potential energy. A total of 864 FE models covering practical configurations of cellular steel shapes are analysed to assess the analytical solution and the extension of AISC360 and EC3 strength interaction equations. Effects of the parent shape, web opening configuration, member slenderness, and load eccentricity on the member strength are investigated. The results show that the proposed analytical solution accurately predicts the capacity of cellular steel members under combined compression and major-axis bending. Also, the European Code EC3 strength interaction equation that adopts the refined elastic buckling equation specifically derived for the cellular steel members can accurately predict the strength of practical cellular steel shapes. Finally, a criterion for effective utilisation of the cellular steel shapes is proposed to ensure that they exhibit greater strength than their parent shapes.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 3","pages":"693 - 707"},"PeriodicalIF":1.1,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141121507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Estimation of the Anti-sliding Safety Factor Between the Main Cable and Middle Saddle of Three-Pylon Steel Suspension Bridges 三塔钢悬索桥主缆与中间鞍座之间的防滑动安全系数估算

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-17 DOI: 10.1007/s13296-024-00848-1

Jin Cheng, Yi Yuan, Zekun Yu, Kedi Sun

{"title":"Estimation of the Anti-sliding Safety Factor Between the Main Cable and Middle Saddle of Three-Pylon Steel Suspension Bridges","authors":"Jin Cheng, Yi Yuan, Zekun Yu, Kedi Sun","doi":"10.1007/s13296-024-00848-1","DOIUrl":"10.1007/s13296-024-00848-1","url":null,"abstract":"<div><p>An efficient and accurate method is proposed to estimate the anti-sliding safety factor between the main cable and middle saddle of three-pylon suspension bridges satisfying the prescribed reliability levels. It is developed based on the inverse reliability method. Uncertainties in the maximum static friction coefficient, the center angle of the saddle wound with cables, the cable force at the tight side and the cable force at the loose side are incorporated in the proposed method. The unique characteristic of the proposed method is that it offers a tool for the anti-sliding safety assessment between the main cable and middle saddle of three-pylon suspension bridges when the reliability level is specified as a target to be satisfied by the designer. The efficiency and accuracy of this method concerning a three-pylon suspension bridge are studied and numerical results prove its effectiveness. Finally, the effects of some important parameters on the anti-sliding safety factor between the main cable and middle saddle of three-pylon suspension bridges are also discussed.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"709 - 718"},"PeriodicalIF":1.1,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141063602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Experimental Evaluation of Negative Flexural Capacity of Composite Slabs Embedded with Truss Girders 嵌入桁架梁的复合板负挠承载力的实验评估

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-16 DOI: 10.1007/s13296-024-00844-5

Su-Chan Jun, Cheol-Ho Lee, Chang-Jun Bae, Gi-Taek Chung

{"title":"Experimental Evaluation of Negative Flexural Capacity of Composite Slabs Embedded with Truss Girders","authors":"Su-Chan Jun, Cheol-Ho Lee, Chang-Jun Bae, Gi-Taek Chung","doi":"10.1007/s13296-024-00844-5","DOIUrl":"10.1007/s13296-024-00844-5","url":null,"abstract":"<div><p>In this study, a novel composite slab integrating truss girders was introduced. Flexural tests were conducted on a total of eight composite slab specimens to evaluate their negative flexural capacities. Based on the test results, the negative flexural behavior of the composite slabs was analyzed, including the development of catenary action, and the effects of truss girders and diagonally bent integrity reinforcements. All specimens showed satisfactory performance in terms of their flexural strength and stiffness and exhibited high ductility capacities. The test specimens did not show any noticeable degradation in flexural strength, and the tests were terminated due to the displacement stroke limitation of the actuator. Strain measurements clearly indicated an effective transition of the negative moment-resisting mechanism from flexural to catenary action at large deformations, causing the entire section to be subjected to tensile forces. The development of catenary action was the main reason for the high ductility observed in the specimens. The truss girders, although not spanning the entire width of the supporting beams, effectively enhanced the negative flexural strength of the composite slabs as their ends partially extended through the critical failure section. The effects of the truss girder were particularly notable in specimens supported by H-section beams, where the negative flexural strengths increased by about 10 –20%. Furthermore, diagonally bent integrity reinforcements, primarily introduced for ease of construction, were also found to effectively increase the negative flexural strength of the composite slabs by developing tensile forces when diagonal cracks developed in concrete sections.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 3","pages":"644 - 657"},"PeriodicalIF":1.1,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140967790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Evaluation of the Impact Resistance of Steel–Aluminum Laminated Target Plates with Isoplanar Density 等面密度钢铝层压靶板的抗冲击性评估

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-11 DOI: 10.1007/s13296-024-00845-4

Yunfei Deng, Zhongshan Wang

{"title":"Evaluation of the Impact Resistance of Steel–Aluminum Laminated Target Plates with Isoplanar Density","authors":"Yunfei Deng, Zhongshan Wang","doi":"10.1007/s13296-024-00845-4","DOIUrl":"10.1007/s13296-024-00845-4","url":null,"abstract":"<div><p>The research aims to investigate the impact resistance of steel-aluminum laminated target plates, which is crucial for the design of high-performance anti-invasion structures. Previous studies have presented conflicting views on the protective performance of steel-aluminum laminated target plates, highlighting the need to clarify the influence of structural parameters on their protection capabilities. To address this, two groups of steel and aluminum plates with similar strengths and large differences in strengths were selected and tested. The ballistic limits characteristics of these double-layered plates were analyzed under different projectile nose shapes. Additionally, a 3D finite element model was established using ABAQUS/Explicit software, after the validity of the model was verified, the influence of the arrangement order of the steel and aluminum on the impact resistance was numerically simulated. The results show that the strength of the steel and aluminum plate materials is the key factor influencing the order of the best impact resistance of the target plate, and the shape of the projectile's nose and the thickness of the target plate don't have much influence on the order of the best impact resistance, which is also proved by the simulation results of the isoplanar density (same surface density). This study is instructive for the design and application of steel-aluminum laminated target plate structures with protective ends.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 3","pages":"658 - 671"},"PeriodicalIF":1.1,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140940917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Features of Mechanical Properties and Residual Stress Distribution in Butt Joint of HSB690-SM355 Dissimilar Steel HSB690-SM355 异种钢对接接头的力学性能和残余应力分布特征

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-10 DOI: 10.1007/s13296-024-00836-5

Tae-Hwan Um, Kyong-Ho Chang, Jae-Yik Lee, Nizam Khan Sazid, Mikihito Hirohata

{"title":"Features of Mechanical Properties and Residual Stress Distribution in Butt Joint of HSB690-SM355 Dissimilar Steel","authors":"Tae-Hwan Um, Kyong-Ho Chang, Jae-Yik Lee, Nizam Khan Sazid, Mikihito Hirohata","doi":"10.1007/s13296-024-00836-5","DOIUrl":"10.1007/s13296-024-00836-5","url":null,"abstract":"<div><p>HSB690 steel is high-performance steel for bridges manufactured by POSCO of Korea through a thermo-mechanical controlled process (TMCP). However, the application of these high-performance steels to the entire structure is challenging in terms of cost. The combination of dissimilar steels can be a good alternative. Welding of HSB690 steel is mainly used for joining dissimilar steel materials. Residual stresses and deformations caused by welding affect the fatigue performance of the structure. In particular, tensile residual stress around welds significantly affects the fatigue and fracture behavior of dissimilar materials by increasing the mean stress. Bridge structures using HSB690 are gradually increasing, but the features of residual stress at the similar or dissimilar welded joint using HSB690 have not been reported. The physical and mechanical properties at each temperature are essential for residual stress analysis. However, the mechanical properties of HSB690 with temperature are not clear yet. Thus, before the residual stress analysis, the mechanical properties of HSB690 were determined by high-temperature tensile tests. Then, the three-dimensional (3D) thermal elastic–plastic finite element (FE) analysis was conducted to assess the residual stresses in the butt-welded member composed of SM355 and HSB690 steel. The residual stresses measured by the strain release method were compared for the precision of the analysis results. Moreover, residual stress analysis in welds composed of the same kind of steel materials was also performed for comparison. As a result of simulations and experimental measurements, in the member welded with dissimilar steels, the SM355 side showed almost similar residual stress distribution compared to corresponding similar steel welds, but the residual stress distribution in the HSB690 side was higher than that of the similar steel welds.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 3","pages":"565 - 578"},"PeriodicalIF":1.1,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140940916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Mass Optimization of Crane Box Girder Considering Both Ribs and Diaphragms using APDL 使用 APDL 对同时考虑肋骨和横隔梁的起重机箱梁进行质量优化

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-10 DOI: 10.1007/s13296-024-00846-3

Yangzhi Ren, Xuechun Liu, Bin Wang

{"title":"Mass Optimization of Crane Box Girder Considering Both Ribs and Diaphragms using APDL","authors":"Yangzhi Ren, Xuechun Liu, Bin Wang","doi":"10.1007/s13296-024-00846-3","DOIUrl":"10.1007/s13296-024-00846-3","url":null,"abstract":"<div><p>Mass optimization of crane box girder considering both ribs and diaphragms is a crucial aspect of crane structural design in mechanical engineering. However, two common challenges often obscure this process: the sizing of stiffeners such as diaphragms and ribs, and the selection of constraints on state variables related to stresses and deformations for various load cases. In response, this paper focuses on optimizing the dimensions, number, and placement of stiffeners, including ribs and diaphragms, in a two-girder overhead crane structure. The paper begins by establishing criteria for the initial height of the box girder through a comparative analysis of structural strength and stiffness. Subsequently, dimensional relationships between stiffeners and the girder section are built in accordance with the principles of local plate stability. Following this, the ANSYS Parametric Design Language (APDL) program is coded and executed to optimize the crane mass using three methods: sub-problem approximation, sweep, and first-order methods via Module Design OPT for four chosen sets of state variables. A comparative analysis of the optimum crane mass, based on the rounded-up design variables, reveals that constraints on stresses and deformations from both vertical and transversal impact cases, as well as the vertical frequency from dynamic vibration cases, yield the best results. Furthermore, the proposed APDL method is compared and validated against Grey Wolf Optimizer, Whale Optimization Algorithm, Particle Swarm Optimization, and Genetic Algorithm. Finally, a parametric study is conducted using curves and tables to explore the influence of structural stiffness and material property on the optimized dimensions of the girder and stiffeners, as well as the overall mass and mechanical performance.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 3","pages":"672 - 692"},"PeriodicalIF":1.1,"publicationDate":"2024-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140941114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Experimental and Finite Element Method Investigation of Axial Load Carrying Capacity of Concrete Filled Circular Steel Tube Columns According to Different Slenderness Ratios 不同纤度比下混凝土填充圆钢管柱轴向承载能力的实验和有限元法研究

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-05-07 DOI: 10.1007/s13296-024-00842-7

Fethullah Uslu, Kıvanç Taşkın

{"title":"Experimental and Finite Element Method Investigation of Axial Load Carrying Capacity of Concrete Filled Circular Steel Tube Columns According to Different Slenderness Ratios","authors":"Fethullah Uslu, Kıvanç Taşkın","doi":"10.1007/s13296-024-00842-7","DOIUrl":"10.1007/s13296-024-00842-7","url":null,"abstract":"<div><p>In this study, a total of 70 experiment specimens, 56 of circular cross-section concrete filled steel tube (CFST) columns and 14 hollow steel tubes with various geometric and material properties, were tested under axial loading. Composite columns with four different concrete compressive strength (<i>f</i><sub><i>c</i></sub>), three different diameter/thickness (<i>D</i>/<i>t</i>) ratio and seven different length/diameter (<i>L</i>/<i>D</i>) ratio used in the experiment samples were designed. The ultimate axial force, axial deformation, and failure modes of the CFST columns obtained from the experiment results were determined. Concrete contribution Ratio index, and strength index were determined from the test results obtained. The ultimate axial force of CFST columns were compared with standards such as AISC360-16 and Eurocode 4. Finally, the finite element (FE) model is proposed to predict the ultimate axial force and behaviour of CFST columns. According to the results obtained, the ultimate axial force of the CFST columns increased as the fc and <i>D</i>/<i>t</i> ratio increased, while the ultimate axial force decreased as the <i>L</i>/<i>D</i> ratio increased. According to the experiment results, it has been seen that the ultimate axial force of the CFST columns is closer to the Eurocode 4 standard. The results obtained from the FE models were calculated on mean 5% more than the experimental results.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 3","pages":"619 - 634"},"PeriodicalIF":1.1,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140885294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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