Journal of Constructional Steel Research最新文献_第2页

Modified Johnson-Cook constitutive model for butt-welded Q345 structural steel after high temperature cooling Q345结构钢对焊高温冷却后的改进Johnson-Cook本构模型

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-23 DOI: 10.1016/j.jcsr.2025.109801

Xiaotong Luo , Chuntao Zhang , Hongjie Zhu , Renbing An

引用次数: 0

Fatigue analysis and performance evaluation of stainless-steel-cruciform-joint with welding pore defect 含焊接孔缺陷的不锈钢十字形接头疲劳分析及性能评价

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-22 DOI: 10.1016/j.jcsr.2025.109814

Zhikuan Ren , Haosong Chang , Qingrui Yue , Xiaogang Liu

{"title":"Fatigue analysis and performance evaluation of stainless-steel-cruciform-joint with welding pore defect","authors":"Zhikuan Ren , Haosong Chang , Qingrui Yue , Xiaogang Liu","doi":"10.1016/j.jcsr.2025.109814","DOIUrl":"10.1016/j.jcsr.2025.109814","url":null,"abstract":"<div><div>Stainless steel cruciform welded joints with pre-embedded pore defects were fabricated for fatigue testing in this study. A finite element model for fatigue damage evolution, accounting for the different fatigue properties of the base metal and molten pool material, was established, and the validity of the finite element analysis (FEA) method was verified. The effects of pore location, pore size, and fatigue stress amplitude on fatigue strength and failure modes were further investigated. The results indicated that different pore locations might lead to weld toe and weld failure modes, with fatigue strengths of 101.7 MPa and 132.0 MPa, respectively. The FEA fatigue damage evolution model effectively predicted the fatigue life of cruciform stainless steel welded joint specimens with pore defects. The most detrimental position occurred when the pore was located in the sub-surface of the molten pool near the weld toe, resulting in weld failure modes under high stress amplitudes. Finally, by combining the fatigue performance under both failure modes, an <em>S</em>-<em>N</em> curve envelope was proposed to evaluate fatigue performance when the location of pore defects was unknown.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109814"},"PeriodicalIF":4.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Two approaches for modeling CFST columns under fire conditions 火灾条件下钢管混凝土柱的两种建模方法

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-22 DOI: 10.1016/j.jcsr.2025.109797

Milan Bursać, Svetlana M. Kostić

{"title":"Two approaches for modeling CFST columns under fire conditions","authors":"Milan Bursać, Svetlana M. Kostić","doi":"10.1016/j.jcsr.2025.109797","DOIUrl":"10.1016/j.jcsr.2025.109797","url":null,"abstract":"<div><div>The paper presents a study on the advanced nonlinear analysis of concrete-filled steel tube (CFST) columns at elevated temperatures. Two computationally efficient approaches are analyzed: modeling CFST columns using the concentrated plasticity element based on the generalized plasticity material model (GP model) and using the fiber-based distributed plasticity beam–column element based on the displacement formulation. The GP element is for the first time used for fire analysis of columns with rectangular and circular cross-sections and the formulation is extended to consider additional reinforcement bars. The applied modeling with both elements follows, where possible, the recommendations of the second generation of the Eurocode 4 standard. The applicability of the optimized cross-section discretization schemes in nonlinear fire analysis with fiber element is also investigated. Through extensive validation studies, the results of the two approaches are compared with the available experimental and numerical results. This comparison includes not only the determination of the critical fire exposure time but also the quality of the whole force–displacement response, deformed shape and aspects of computational efficiency. Finally, the benefits and limitations of one approach and the other are discussed and summarized.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109797"},"PeriodicalIF":4.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 performance of steel-reinforced concrete hybrid structures considering vertical stiffness variations 考虑竖向刚度变化的钢-钢筋-混凝土混合结构抗震性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-22 DOI: 10.1016/j.jcsr.2025.109811

Ju Chen , Liang Hu , Kang Liu

{"title":"Seismic performance of steel-reinforced concrete hybrid structures considering vertical stiffness variations","authors":"Ju Chen , Liang Hu , Kang Liu","doi":"10.1016/j.jcsr.2025.109811","DOIUrl":"10.1016/j.jcsr.2025.109811","url":null,"abstract":"<div><div>The load-carrying capacity and stiffness variation method of transfer connections significantly influence the dynamic response of steel-reinforced concrete vertical hybrid structures. This study proposes a new transfer connection characterized by short steel beams and U-shaped stirrups welded to the bottom of the steel tube to enhance the interaction between the steel tube and the concrete. Additionally, introducing concrete and steel angles inside the steel tube to form a concrete-filled steel tube (CFST) column facilitates smoother stiffness variation along the vertical direction. Five 0.5-scale specimens were designed and fabricated for physical tests. The tests were conducted by applying combined pre-axial loads and lateral cyclic loading to evaluate the seismic performance of the proposed transfer connections. The results demonstrate that incorporating concrete and steel angles inside the steel tube substantially improves the transfer connection's load-carrying capacity, stiffness, and energy dissipation capacity. A larger volume of concrete can enhance stiffness and energy dissipation; however, its effect on load-carrying capacity varies depending on whether steel angles are present inside the tube. Compared with standard EC3, the proposed transfer connection achieves a rigid connection between the structure's steel/CFST and reinforced concrete (RC) parts. Furthermore, a comparison with standards GB 50986, GB 50017, EC4, EC3, and AISC 360 shows that the load-carrying capacity of the proposed connection exceeds that of the steel/CFST column, thereby adhering to the design philosophy of strong connections and weak members.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109811"},"PeriodicalIF":4.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 performance and design methods of self-reset artificial controllable plastic hinge using SMA bars SMA自复位人工可控塑性铰的抗震性能及设计方法

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-22 DOI: 10.1016/j.jcsr.2025.109816

Hua Huang , Fangyuan Lin , Bin Wang , Wanchao Deng , Mengxue Guo

{"title":"Seismic performance and design methods of self-reset artificial controllable plastic hinge using SMA bars","authors":"Hua Huang , Fangyuan Lin , Bin Wang , Wanchao Deng , Mengxue Guo","doi":"10.1016/j.jcsr.2025.109816","DOIUrl":"10.1016/j.jcsr.2025.109816","url":null,"abstract":"<div><div>To improve the repairability of prefabricated buildings, reduce the post-earthquake repair workload, and prolong the service life of prefabricated buildings, this paper designed a new type of self-reset artificial controllable plastic hinge (SACPH) for assembled beam-column joint, which is made of Shape Memory Alloy (SMA). A theoretical design method of the SACPH joint was established. The hysteretic performance of eleven assembled joints with different design parameters, such as different diameters, lengths and material properties of SMA, were studied by finite element software based on the experimental verification model. The results showed that the maximum residual deformation of SACPH was only 2 %. The damage of SACPH mainly concentrated on the weak area of the SMA bar. The average yield and peak loads of the SACPH specimen were 20.95 % and 17.39 % lower respectively, than those of the cast-in-place frame. When the amount of steel bars used in SACPH was 20 % of the cast-in-place specimen, the bearing capacity could reach about 80 % of the latter. Increasing the diameter of the SMA bar and reducing its the length could improve the bearing capacity and self-reset ability of SACPH joints. The applicable range of the diameter and the length of the energy dissipation bars were 14 mm to 22 mm and 225 mm to 275 mm, respectively. In addition, a theoretical model in predicting the bearing capacity and displacement of SACPH joints when they yield are established, and the theoretical results agreed well with the simulation results.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109816"},"PeriodicalIF":4.0,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Curvature integration-based flexural stiffness of steel-prestressed concrete composite girders under negative moments 负弯矩作用下基于曲率积分的钢-预应力混凝土组合梁抗弯刚度研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-21 DOI: 10.1016/j.jcsr.2025.109805

Fei Peng , Weichen Xue , Lili Bai

{"title":"Curvature integration-based flexural stiffness of steel-prestressed concrete composite girders under negative moments","authors":"Fei Peng , Weichen Xue , Lili Bai","doi":"10.1016/j.jcsr.2025.109805","DOIUrl":"10.1016/j.jcsr.2025.109805","url":null,"abstract":"<div><div>Due to the slip effect in the steel-concrete interface and tension stiffness effect in the concrete slab, accurately predicting the flexural stiffness of steel-prestressed concrete composite girders in the hogging moment region is highly challenging. This paper provides a mechanics-based yet practical method for estimating the flexural stiffness of such girders under service load conditions. Firstly, a validated moment-curvature procedure is developed to analyze the tension-stiffening behavior of the girders. The analysis results indicate that the tension stiffening effect in steel-prestressed concrete composite sections is negligible, allowing their moment-curvature response to be idealized as a bilinear graph in which the interface slip effect is considered. Subsequently, a curvature integration-based method is used to derive expressions for the effective flexural stiffness of the steel-prestressed concrete composite girder. Based on this, an expression for the effective flexural stiffness at the critical section is recommended for design purposes. Finally, the proposed method is validated by comparing its predictions against experimental results from 27 composite girders.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109805"},"PeriodicalIF":4.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 analysis and restoring force model of semi-prefabricated CFDST column-steel beam joint 半预制CFDST柱-钢梁节点数值分析及恢复力模型

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-21 DOI: 10.1016/j.jcsr.2025.109810

Dongfang Zhang, Yu Wang, Junhai Zhao, Dandan Li, Congcong Fan

{"title":"Numerical analysis and restoring force model of semi-prefabricated CFDST column-steel beam joint","authors":"Dongfang Zhang, Yu Wang, Junhai Zhao, Dandan Li, Congcong Fan","doi":"10.1016/j.jcsr.2025.109810","DOIUrl":"10.1016/j.jcsr.2025.109810","url":null,"abstract":"<div><div>Concrete-filled double-skin tubular (CFDST) structures demonstrate considerable potential in high-rise building applications and resilience against extreme disasters. However, traditional CFDST joint designs face challenges in engineering practice, such as high construction difficulty and complex on-site welding, which limit the widespread application of CFDST structures. This study developed a novel semi-prefabricated CFDST column-teel beam joint and conducted quasi-static tests on five joints. Subsequently, an accurate finite element model (FEM) was established and validated through comparison with the experimental results, including the failure modes, the hysteresis and skeleton curves, and the moment capacity. Building on the high accuracy of the model, 21 finite element simulations were conducted to analyze the effects of eleven parameters on the performance of the joint. The results revealed that increasing the thickness of the outer square steel tube by 4 mm and extending the ring plate length by 80 mm enhanced energy dissipation by 14.6 % and 95.3 %, respectively. Replacing a solid-core CFDST column with a hollow-core design not only reduced structural weight but also facilitated the inner circular steel tube to carry more load as the outer square tube reached its ultimate strength. Additionally, the joint exhibited excellent seismic performance even under a high axial compression ratio of 0.45. Finally, a trilinear skeleton curve model and hysteretic rules were established, and a simplified restoring force model was proposed. This model demonstrates high evaluation accuracy and can serve as a reference for the elasto-plastic seismic response analysis of such structures.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109810"},"PeriodicalIF":4.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Steel plate composite shear walls with 100 MPa concrete and spiral-reinforced boundaries 100mpa混凝土螺旋配筋边界钢板组合剪力墙

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-21 DOI: 10.1016/j.jcsr.2025.109808

Hai Chen , Zi-Xiong Guo , Hong-Song Hu , Bahram M. Shahrooz

{"title":"Steel plate composite shear walls with 100 MPa concrete and spiral-reinforced boundaries","authors":"Hai Chen , Zi-Xiong Guo , Hong-Song Hu , Bahram M. Shahrooz","doi":"10.1016/j.jcsr.2025.109808","DOIUrl":"10.1016/j.jcsr.2025.109808","url":null,"abstract":"<div><div>This study introduces an innovative spiral-confined concrete-filled steel plate (SCCFSP) composite shear wall that is designed to improve ductility through spiral reinforcement in boundary elements, particularly when high-strength concrete is used. The seismic behavior of SCCFSP composite shear walls was evaluated and compared against two other configurations: (1) walls with tie bars and no boundary elements and (2) walls with stiffeners and concrete-filled steel tube (CFST) columns acting as boundary elements. The test specimens were subjected to a constant compressive axial load and reversed cyclic lateral load. The test results show that the ultimate drift ratio and cumulative energy dissipation of the specimen with stiffeners and CFST columns increased by 55 % and 220 %, respectively, compared to the specimen with tie bars and no boundary elements. The ultimate drift ratio and cumulative energy dissipation of the specimen with spirals in the boundary elements further increased by 61 % and 80 %, respectively, compared to the specimen with stiffeners and CFST columns. A numerical model of SCCFSP composite shear walls was developed to establish the relationship between the ultimate cross-section curvature and spiral details, such as the effective confinement index and spiral configuration length. A design algorithm was also developed to iteratively determine the (a) minimum effective confinement index, (b) minimum spiral length satisfying axial compression ratio, and (c) ultimate drift ratio limitations. Based on numerical simulations of 176 SCCFSP wall sections, simplified formulas are proposed to calculate the minimum effective confinement index and spiral configuration length of spirals within SCCFSP composite shear walls.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109808"},"PeriodicalIF":4.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Axial Compressive Behavior of SRC Columns After Freeze-Thaw Cycles 冻融循环后SRC柱的轴压特性

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-21 DOI: 10.1016/j.jcsr.2025.109802

Weichen Wang, Junhua Li, Chunheng Zhou, Pingjun Chen, Jinming Xiang

{"title":"Axial Compressive Behavior of SRC Columns After Freeze-Thaw Cycles","authors":"Weichen Wang, Junhua Li, Chunheng Zhou, Pingjun Chen, Jinming Xiang","doi":"10.1016/j.jcsr.2025.109802","DOIUrl":"10.1016/j.jcsr.2025.109802","url":null,"abstract":"<div><div>This study investigates the impact of freeze-thaw cycles on the axial compressive behavior of steel-reinforced concrete (SRC) columns. Axial compression tests were conducted on twenty-eight SRC columns subjected to freeze-thaw cycles. Key parameters included the number of freeze-thaw cycles, freezing medium, compressive strength of concrete, and volumetric stirrup ratio. The study examined the degradation in ultimate load-bearing capacity, failure mechanisms, and performance indicators using Digital Image Correlation (DIC) to capture failure processes under axial loading. Three failure modes were identified: localized cracking, multi-crack development, and delamination of the outer protective concrete layer. These failure modes were found to be influenced by both the number of freeze-thaw cycles and the compressive strength of the concrete. Significant reductions in both ultimate load and stiffness were observed, with maximum decreases of 30.33 % and 75.82 % under freshwater conditions, and 36.75 % and 78.07 % under seawater conditions, respectively. Although ductility generally declined after freeze-thaw cycles, some specimens showed increased ductility due to altered failure modes. After 50 freeze-thaw cycles, the difference in performance degradation between freshwater and seawater conditions was negligible. However, once the number of cycles reached 100, the reduction in both ultimate load and stiffness caused by seawater exposure became significantly more severe than that caused by freshwater. Based on the experimental findings and theoretical analysis, a predictive method was developed to estimate the ultimate axial capacity of SRC columns after freeze-thaw cycles, achieving a prediction error within 10 %.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109802"},"PeriodicalIF":4.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Axial compressive behavior of circular CFST stub columns with pitting corrosion 含点蚀的CFST圆形短柱轴压特性

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-07-21 DOI: 10.1016/j.jcsr.2025.109809

Haijia Huang , Lanhui Guo , Jie Chen , Jianwei Li , Zhen Wang

{"title":"Axial compressive behavior of circular CFST stub columns with pitting corrosion","authors":"Haijia Huang , Lanhui Guo , Jie Chen , Jianwei Li , Zhen Wang","doi":"10.1016/j.jcsr.2025.109809","DOIUrl":"10.1016/j.jcsr.2025.109809","url":null,"abstract":"<div><div>Concrete-filled steel tube (CFST) members are extensively employed in diverse structural applications due to their superior mechanical properties, remarkable economic benefits and construction convenience. However, these members are susceptible to corrosion during service, particularly local pitting corrosion, which typically occurs on the steel tube and causes substantial damage. This study investigates the axial compressive performance of circular CFST stub columns with pitting corrosion. Firstly, 12 specimens were tested and pitting corrosion was achieved by machining defects. Next, the finite element (FE) model of corresponding members was created, and the model's reliability was validated against the experimental observations. To account for the randomness of local corrosion, a detailed parametric analysis was conducted to explore the effects of various factors such as volume loss, corrosion depth, steel ratio and material strength on the axial compressive behavior of the columns. Based on both experimental and FE analysis results, a method for determining the bearing capacity of circular CFST with local pitting corrosion was developed, providing valuable insights for the evaluation and strengthening of corroded CFST members in practical engineering applications.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"235 ","pages":"Article 109809"},"PeriodicalIF":4.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144680226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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