International Journal of Steel Structures最新文献_第5页

Effects of Solution Temperature on the Galvanic Corrosion Between Carbon Fiber and Carbon Steel SM490A 溶液温度对碳纤维和碳钢 SM490A 之间电化学腐蚀的影响

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-07-12 DOI: 10.1007/s13296-024-00870-3

Jian Tang, Muye Yang

引用次数: 0

Utilization of Sodium Polyacrylate Hydrogels in the Sacrificial Anode Cathodic Protection Method for Steel Members at the Atmospheric Environment 在大气环境下钢铁构件的牺牲阳极阴极保护方法中使用聚丙烯酸钠水凝胶

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-07-12 DOI: 10.1007/s13296-024-00865-0

Jie Xu, Shigenobu Kainuma

{"title":"Utilization of Sodium Polyacrylate Hydrogels in the Sacrificial Anode Cathodic Protection Method for Steel Members at the Atmospheric Environment","authors":"Jie Xu, Shigenobu Kainuma","doi":"10.1007/s13296-024-00865-0","DOIUrl":"10.1007/s13296-024-00865-0","url":null,"abstract":"<div><p>To achieve sacrificial anode cathodic protection (SACP) for steel members in the atmospheric environment, the sodium polyacrylate hydrogels were prepared and acted as electrolyte carriers in the protection system. The hydrogels absorbing varying concentrations of sodium chloride solution were verified by the water swelling and retention test, the electrochemical test, and the constant exposure test. The result shows that the hydrogel shows a remarkable water absorption capacity with the NaCl solution. However, within 48 h, little difference shows in the swelling ratio. And the water retentivity weakens with the concentrations of sodium chloride solution increasing up to 3.5 mass%. The hydrogel absorbing 10.0 mass% sodium chloride solution exhibits the highest retention ratio. Moreover, the steel specimens immersed in the hydrogel show greater resistance to corrosion compared to exposure in NaCl aqueous solution. Besides, the SACP method using the hydrogel can sustain corrosion protection for over 200 h, based on the time-dependent anti-corrosion current density, which ensures the durability of the system. Overall, the findings suggest that sodium polyacrylate hydrogels demonstrate promising attributes as electrolyte carriers, broadening the potential application of the SACP method to atmospheric environments.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 6","pages":"1304 - 1311"},"PeriodicalIF":1.1,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141615039","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

Effect of Lip Depth on the Flexural Capacity of Cold-Formed Steel Section 唇边深度对冷弯型钢弯曲能力的影响

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-07-08 DOI: 10.1007/s13296-024-00867-y

Nitish Vijayamurugan, Vaishnavi Prabaharan, Punitha kumar Akhas

{"title":"Effect of Lip Depth on the Flexural Capacity of Cold-Formed Steel Section","authors":"Nitish Vijayamurugan, Vaishnavi Prabaharan, Punitha kumar Akhas","doi":"10.1007/s13296-024-00867-y","DOIUrl":"10.1007/s13296-024-00867-y","url":null,"abstract":"<div><p>Cold-formed steel section (CFS) is broadly utilised in structural elements such as compression members, flexural members and tension members. Owing to its commendable properties such as light weight, easy handling, faster installation, aesthetic appearance and high strength to weight ratio, this study investigates the impact of lip depth and web depth on the flexural strength of light gauge steel C-sections. Specifically, it examines the flexural strength, including the strength-to-weight ratio, of C-sections with varying lip depths, and comparing these trends across different web depths. A finite element analysis was carried out to determine the optimum dimension of the depth of the lip by using the software ABAQUS. Load–deflection behaviour, failure modes, strength to weight ratio and changes in the load carrying capacity were discussed in this paper. The paper explores the load–deflection behaviour, failure modes, strength-to-weight ratio variations and corresponding differences in bending carrying capacity. The analysis reveals that the strength-to-weight ratio of C-sections increases gradually with lip depth. Moreover, an increase in lip depth positively influences the load carrying capacity of lipped channel sections in CFS structures.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"849 - 861"},"PeriodicalIF":1.1,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573332","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

Topology Optimization and 3D Printing of Steel Joints by SJ-BESO and FDM Method 采用 SJ-BESO 和 FDM 方法优化钢接头拓扑并进行三维打印

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-07-07 DOI: 10.1007/s13296-024-00863-2

Pengshan Tang, Wenfeng Du, Chao Wang, Jinchao Gu, Mijia Yang

{"title":"Topology Optimization and 3D Printing of Steel Joints by SJ-BESO and FDM Method","authors":"Pengshan Tang, Wenfeng Du, Chao Wang, Jinchao Gu, Mijia Yang","doi":"10.1007/s13296-024-00863-2","DOIUrl":"10.1007/s13296-024-00863-2","url":null,"abstract":"<div><p>The problems of low computational efficiency and checkerboard phenomenon in optimizing steel joints with the bi-directional evolutionary structural optimization (BESO) method are intractable, which usually leads to failure to achieve optimized solutions even after spending long calculation time. This paper proposes an improved algorithm based on the BESO theory for steel joints (SJ-BESO) by utilizing a sensitivity filtering radius to weight the sensitivity values of each element. And a sensitivity threshold segment is proposed to determine the deletion or addition of elements. Additionally, a convergence parameter is developed to ensure the stability of the optimization calculation. Several real-word examples of steel joints are provided to illustrate the proposed method. The results show that the improved BESO algorithm not only reduces the number of iterations, but also produces ideal structures with good stiffness. The 3D printing manufacturing of the example model verifies the manufacturability of the obtained designs and enhances its intuitive understanding. The SJ-BESO is applicable and promising for the topology optimization of steel joints.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"743 - 757"},"PeriodicalIF":1.1,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141573331","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

Behaviour of Braced and Unbraced Multi-storey Steel Framed Buildings on Flat and Sloping Terrain 平地和坡地上有支撑和无支撑多层钢结构建筑的行为

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-07-05 DOI: 10.1007/s13296-024-00866-z

Palash Dey, Sylvia Wahengbam, Ainal Hoque Gazi

{"title":"Behaviour of Braced and Unbraced Multi-storey Steel Framed Buildings on Flat and Sloping Terrain","authors":"Palash Dey, Sylvia Wahengbam, Ainal Hoque Gazi","doi":"10.1007/s13296-024-00866-z","DOIUrl":"10.1007/s13296-024-00866-z","url":null,"abstract":"<div><p>In recent days, emerging nations have needed new and enhanced infrastructure projects to support their growing populations. There is a daily rise in the demand for residential land as the population expands. In addition to flat land, sloping land in hilly areas must be considered to satisfy the demand for housing land. Moreover, vertical development in the form of multi-storey buildings is the only solution to the problem. In this context the effects of various forms of bracing on the seismic performance of two hill building configurations, such as stepback and stepback-setback, were investigated and compared to a building standing on level ground. A time history dynamic analysis was performed to assess structural responses in terms of seismic parameters such as fundamental time period, top storey lateral displacement, storey drift, base shear, and torsion. The building standing on leveled and sloping ground have been modelled with bracings placed at three different locations, namely at the corners, the mid-edge, and the centre of the building. Buildings standing on sloping land are found to be extremely vulnerable to earthquakes due to irregularities in elevation. X-braced frames, V braced frames, and inverted V braced frames have all been examined in order to identify the best bracing system that significantly improved the seismic resilience of building frames. The Stepback-setback X-braced frame, positioned at the center of the building model, demonstrated the highest percentage decrease in lateral displacement compared to the control model during the El Centro earthquake: 16.27% along and 15.55% across the slope line, respectively. Similar trends were observed for the Northridge and Loma Prieta earthquakes. This highlights the effectiveness of the setback-stepback model with a centrally placed X-bracing system as the preferred choice for buildings on sloping ground due to its superior seismic resilience.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"758 - 776"},"PeriodicalIF":1.1,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549214","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

Residual Mechanical Properties of Q345FR Steel Exposed to High Temperatures 高温下 Q345FR 钢的残余力学性能

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-06-28 DOI: 10.1007/s13296-024-00859-y

Suhang Yang, Chen Hu, Zhifeng Xu

{"title":"Residual Mechanical Properties of Q345FR Steel Exposed to High Temperatures","authors":"Suhang Yang, Chen Hu, Zhifeng Xu","doi":"10.1007/s13296-024-00859-y","DOIUrl":"10.1007/s13296-024-00859-y","url":null,"abstract":"<div><p>Steel structures used in engineering projects and infrastructure should withstand high loading capacities with excellent resistance to fire. A new Q345 fire-resistant (Q345FR) steel has been recently developed in China. The residual mechanical properties of steel structures are critical indicators for assessing structural damage and reusability, so in-depth research is urgently needed. Considering temperatures ranging from room temperature to 900 °C, as well as air and water cooling methods, the residual elastic modulus, yield stress, ultimate tensile strength and ultimate strain were explored. Comparison of the residual mechanical properties of Q345FR steel with other structural steels confirmed their close relation to temperatures and cooling methods through testing. The loss of its mechanical properties could be ignored when the temperature is up to 600 °C and the aforementioned cooling methods are used. When the temperature is above 600 °C, the exposed temperatures and cooling methods impact the residual mechanical properties of Q345FR steel significantly. Q345FR steel boasts the comprehensive advantages of excellent strength, high ductility and fire resistance. The prediction equations are offered for predicting such properties of Q345FR steel to accurately evaluate its residual mechanical properties exposed to high temperatures.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"799 - 812"},"PeriodicalIF":1.1,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549218","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

Fatigue Life Prediction of Prefatigued Welded Q235 Steel Butt-Joints Treated by High Frequency Mechanical Impact 经高频机械冲击处理的预疲劳焊接 Q235 钢对接接头的疲劳寿命预测

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-06-24 DOI: 10.1007/s13296-024-00861-4

Tao Li, Chao Zhang, Guotai Huang, Liuyang Feng

引用次数: 0

Experimental Study for Local Buckling of Curved Special-Shaped Pylon 特殊形状弯曲塔架局部屈曲试验研究

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-06-24 DOI: 10.1007/s13296-024-00857-0

Huili Wang, Feng Nie, Weihe Zhao, Dechang Zhang

{"title":"Experimental Study for Local Buckling of Curved Special-Shaped Pylon","authors":"Huili Wang, Feng Nie, Weihe Zhao, Dechang Zhang","doi":"10.1007/s13296-024-00857-0","DOIUrl":"10.1007/s13296-024-00857-0","url":null,"abstract":"<div><p>This paper presents an investigation of the local buckling of curved special-shaped pylons, which are becoming increasingly common in bridge construction. Three kinds of steel plate specimens with different radii of curvature were selected to study the local buckling of curved special-shaped pylons. Both model tests and finite element analyses were conducted. Modal solutions for elastic buckling analysis of the steel plate specimens were obtained using finite element method (FEM). The relationships between load and deformation, and load and strain were determined through testing. The results showed that the sequence of elastic buckling modes from the FEM was consistent with theoretical solutions, and the trends from the test and FEM were generally consistent. It was observed that an increase in curvature led to a decrease in bearing capacity, and the thickness-to-width ratio (t/b) was found to have a greater effect on the reduction factor than the radius-to-width ratio (R/b). Therefore, the thickness of the curved plate was determined to be critical for ultimate strength. The findings from this study offer insights into the behavior of curved special-shaped pylons under load, and provide a basis for their design and construction.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"825 - 838"},"PeriodicalIF":1.1,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549215","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

Numerical Free Vibration Analysis of Sandwich Beams with a Steel-Ceramic FGM Core and FG-CNTRC Facesheets 带钢陶瓷 FGM 内核和 FG-CNTRC 面板的三明治梁自由振动数值分析

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-06-23 DOI: 10.1007/s13296-024-00858-z

Hyeong Jin Kim, Jin-Rae Cho

{"title":"Numerical Free Vibration Analysis of Sandwich Beams with a Steel-Ceramic FGM Core and FG-CNTRC Facesheets","authors":"Hyeong Jin Kim, Jin-Rae Cho","doi":"10.1007/s13296-024-00858-z","DOIUrl":"10.1007/s13296-024-00858-z","url":null,"abstract":"<div><p>The sandwich beams composed of a functionally graded material (FGM) core and functionally graded carbon nanotube-reinforced composite (FG-CNTRC) facesheets have been rarely studied. In this context, this study intends to profoundly investigate their free vibration characteristics, by introducing an effective and reliable FE analysis model. The FGM core is made of a steel-ceramic material, while the FG-CNTRC facesheets are manufactured with polymer and carbon nanotubes (CNTs). The effective material properties of the FGM core and FG-CNTRC facesheets are estimated using the linear rule of mixture. A FE analysis model is generated by dividing the beam into a finite number of homogenized sub-layers, and its reliability is secured by comparing its results with the reference solutions. The parametric study is conducted to profoundly investigate the effects of various parameters, such as the volume fraction of base materials, CNT distribution, core-to-face-sheet-thickness ratio, length-to-thickness ratio, and the boundary condition. The numerical results are discussed, and the main conclusions are explained.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"734 - 742"},"PeriodicalIF":1.1,"publicationDate":"2024-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549217","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 Research and Numerical Analysis on the Concrete-Filled Square CFRP Steel Tube Column Under Compressive-Shear Loading 抗压抗剪荷载下混凝土填充方形 CFRP 钢管柱的实验研究与数值分析

IF 1.1 4区工程技术

International Journal of Steel Structures Pub Date : 2024-06-22 DOI: 10.1007/s13296-024-00860-5

Kuan Peng, Qing-li Wang, Yong-bo Shao

{"title":"Experimental Research and Numerical Analysis on the Concrete-Filled Square CFRP Steel Tube Column Under Compressive-Shear Loading","authors":"Kuan Peng, Qing-li Wang, Yong-bo Shao","doi":"10.1007/s13296-024-00860-5","DOIUrl":"10.1007/s13296-024-00860-5","url":null,"abstract":"<div><p>A large number of concrete-filled CFRP steel tube structures are widely used in practical engineering at current. Considering that as a column structure, compressive-shear loading is a more important bearing capacity method. 12 specimens are designed to study the comperssive-shear performance of concrete filled CFRP steel tube. The shear loading- displacement (<i>V</i>-<i>Δ</i>) curves and the collaborative work performance between the steel tube and CFRP are tested. Based on the tests, a numerical simulation method is firstly proposed to estimate the compressive-shear performance of concrete-filled CFRP steel tube stub column, and then validated against the representative tests results.Parametric study is conducted to explore the influence of principle factors on compresive-shear behaviour by verified numerical models. The experimental results show that the steel tube and CFRP can work together. As the axial compression ratio increases, the shear displacement of the specimen is constrained, resulting in increase of bearing capacity. Additionally, the increase of steel ratio, CFRP layers and materials strength for specimens enhance not only the bearing capacity but also the initial stiffness. The simulation results of the established finite element model are in good agreement with the experimental results. Finally, Based on experimental and finite element results, the bearing capacity correlation equation for concrete-filled square CFRP steel tublar stub columns when subjected to compressive-shear loading is presented.</p></div>","PeriodicalId":596,"journal":{"name":"International Journal of Steel Structures","volume":"24 4","pages":"813 - 824"},"PeriodicalIF":1.1,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549216","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