Journal of Constructional Steel Research最新文献

Global reliability analysis-based optimization design of steel frame structure using direct probability integral method and genetic algorithm 基于直接概率积分法和遗传算法的钢架结构全局可靠性优化设计

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-24 DOI: 10.1016/j.jcsr.2025.109747

Zhenhao Zhang, Chao Zou, Guoqing Wei, Hesheng Li

{"title":"Global reliability analysis-based optimization design of steel frame structure using direct probability integral method and genetic algorithm","authors":"Zhenhao Zhang, Chao Zou, Guoqing Wei, Hesheng Li","doi":"10.1016/j.jcsr.2025.109747","DOIUrl":"10.1016/j.jcsr.2025.109747","url":null,"abstract":"<div><div>Traditional reliability-based optimization design faces challenges, such as difficulties in identifying failure modes and calculating correlation coefficients. To address these issues, this paper specifically investigates the optimization design problem of steel frame structures that meet normal serviceability performance requirements and develops a structural optimization design method based on the Direct Probability Integral Method and Genetic Algorithm (DPIM-GA). First, a joint probability density integral equation for the extremal mappings of multiple performance functions is derived based on the principle of probability conservation. The equation is solved with probability space partitioning and Dirac function smoothing techniques. Second, the performance function of the structural failure mode is identified, and the global reliability index of structures is calculated using DPIM with the Heaviside function. The global reliability index is used as a constraint condition and incorporated into the objective function through the penalty function method, transforming it into an unconstrained optimization problem. Additionally, to address the difficulty of obtaining performance functions of multi-layer structural systems through simple analytical formulas, a method employing response surface functions to fit the performance functions is proposed. Finally, a ten-story steel frame structural is used as a case, optimizing the cross-sectional design to meet the target reliability index. The optimized results are compared with Monte Carlo simulations (MCS) to verify the efficiency and accuracy of the proposed method.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109747"},"PeriodicalIF":4.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144365643","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

Fatigue crack study on rib-to-floorbeam welded joints in novel open-ribbed orthotropic steel decks 新型开肋正交各向异性钢甲板肋-楼板焊接节点疲劳裂纹研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-24 DOI: 10.1016/j.jcsr.2025.109734

Zhijun Li, Yunfei Yuan, Xiuli Xu, Zhuang Feng, Xuehong Li

{"title":"Fatigue crack study on rib-to-floorbeam welded joints in novel open-ribbed orthotropic steel decks","authors":"Zhijun Li, Yunfei Yuan, Xiuli Xu, Zhuang Feng, Xuehong Li","doi":"10.1016/j.jcsr.2025.109734","DOIUrl":"10.1016/j.jcsr.2025.109734","url":null,"abstract":"<div><div>To investigate the fatigue crack propagation characteristics at the rib-to-floorbeam welded joint of a novel orthotropic steel deck with L-ribs, apple-shaped floorbeam cutouts and additional transverse ribs installed between floorbeams, the dominant cracking mode was identified through a full-scale segment model fatigue test, and three-dimensional fatigue crack propagation was simulated using ABAQUS and FRANC3D interactive technology. Results reveal that the dominant crack originates at the floorbeam weld toe at the end of L-rib-to-floorbeam weld seam, propagating diagonally upwards to the rib web weld toe, then vertically along the weld seam. This fatigue crack is characterized as a mixed-mode-I-III crack, dominated by the mode-I crack. During crack propagation, the mode-III stress intensity factor at both ends of the crack front continuously increase, concurrent with a continual augmentation of shear stress parallel to the crack surface. Changes in the direction of maximum principal stress at the crack tip are the primary reason for alterations in the crack propagation direction. The crack propagation life is primarily consumed during the extension of cracks with relatively shallow depth. This study offers basis to enhance the fatigue resistance of the L-rib-to-floorbeam welded joints of the novel orthotropic steel deck.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109734"},"PeriodicalIF":4.0,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144365448","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

Microscopic void closure model for structural steel under compression 结构钢在压缩作用下的微观孔洞闭合模型

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-24 DOI: 10.1016/j.jcsr.2025.109755

Xin-yang Gao , Bo-chuan Jiang , Liang-jiu Jia

引用次数: 0

Behavior of axially loaded circular CFDAT short columns: Experiment and theoretical model 圆形CFDAT短柱轴向受力性能：试验与理论模型

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-23 DOI: 10.1016/j.jcsr.2025.109752

Meng-Nan He , Xi-Feng Yan , Ji-Ping Hao , Jin-Guang Yu

{"title":"Behavior of axially loaded circular CFDAT short columns: Experiment and theoretical model","authors":"Meng-Nan He , Xi-Feng Yan , Ji-Ping Hao , Jin-Guang Yu","doi":"10.1016/j.jcsr.2025.109752","DOIUrl":"10.1016/j.jcsr.2025.109752","url":null,"abstract":"<div><div>The purpose of this paper is to fully understand the performance of axially loaded circular concrete-filled double-skin aluminum alloy tubular (CFDAT) short columns and develop a novel axial load-axial strain theoretical model for such columns. A test program including 12 circular CFDAT short columns was conducted. The effects of hollow ratio, concrete strength, yield stress and diameter-to-thickness ratio of outer aluminum alloy tube on the behavior of the columns studied above was evaluated. The results show that most of the CFDAT specimens have undergone obvious outward buckling near the middle cross-sections or ends of such columns. The ultimate capacity and ductility of the tested specimens decrease when the hollow ratio and diameter-to-thickness ratio increase, but increase as the yield stress increases. Although the ultimate capacity of the tested specimens increases with the increase of concrete strength, the ductility decreases. In addition, comparison between the measured hoop-axial strain curves and the predicted results of Teng's model proves that this model can be used to predict the hoop-axial deformation relationship of the outer aluminum alloy tube of the studied CFDAT columns. Subsequently, a theoretical model for axially loaded circular CFDAT short columns incorporating the Teng's model is proposed, which considers the non-uniform confinement effect of sandwiched concrete and the influence of column's variables. By comparing with the experimental results from this study and published literature, it can be concluded that the proposed theoretical model exhibits good predictive performance.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109752"},"PeriodicalIF":4.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144365642","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

Load-carrying capacity and design method for thread-fixed one-side bolts connected CHS K-joints 螺纹固定单边螺栓连接CHS - k型接头的承载能力及设计方法

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-23 DOI: 10.1016/j.jcsr.2025.109753

Quanyu Zhu , Mei Liu , Baiyi Lv , Lei Zhang , Peijun Wang , Lu Chen , Liming Jiang

{"title":"Load-carrying capacity and design method for thread-fixed one-side bolts connected CHS K-joints","authors":"Quanyu Zhu , Mei Liu , Baiyi Lv , Lei Zhang , Peijun Wang , Lu Chen , Liming Jiang","doi":"10.1016/j.jcsr.2025.109753","DOIUrl":"10.1016/j.jcsr.2025.109753","url":null,"abstract":"<div><div>This study introduces a Thread-fixed One-side Bolts (TOBs) connected CHS K-joint (TOB-CHS K-joint), offering a bolted brace to chord connection type to replace the conventional welded intersection K-joints. Finite element models were developed in ABAQUS to investigate the structural behavior and failure mechanisms of the TOB-CHS K-joint, as well as the chord's ultimate load capacity. Three failure modes were identified with different load-deformation characteristics, which were (1) local plastic failure, (2) inter-hole coupled plastic failure, and (3) punching shear failure. A parametric analysis was conducted to evaluate the effects of key parameters, including the diameter-to-thickness ratio (γ), hole-to-chord diameter ratio (β), hole angle (θ), and gap-to-chord diameter ratio (ξ), on the joint's ultimate load capacity. Results indicate that γ, β, and θ significantly affect the joint's strength and deformation behavior, while ξ has a relatively minor impact. Furthermore, a theoretical model for predicting the ultimate load capacity was established using the ring model and plastic hinge line theory, and validated against numerical simulation results. The proposed model achieves an average prediction error below 5 %, successfully integrating all three failure modes into a unified predictive framework. This study provides fundamental insights into the mechanical behavior of TOB-CHS K-joints, facilitating their application in large-span space structures.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109753"},"PeriodicalIF":4.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338588","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

A comparative study of three fracture models in simulating austenitic stainless steel bolted lap shear connections 三种断裂模型在模拟奥氏体不锈钢螺栓搭接剪切连接中的比较研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-23 DOI: 10.1016/j.jcsr.2025.109756

Yuchen Song , Qun He , Michael C.H. Yam , Xue-Mei Lin , Jiahao Peng , Chao Hou

{"title":"A comparative study of three fracture models in simulating austenitic stainless steel bolted lap shear connections","authors":"Yuchen Song , Qun He , Michael C.H. Yam , Xue-Mei Lin , Jiahao Peng , Chao Hou","doi":"10.1016/j.jcsr.2025.109756","DOIUrl":"10.1016/j.jcsr.2025.109756","url":null,"abstract":"<div><div>This paper thoroughly investigates the performances of three representative fracture models, namely the void growth model, the Lee-Wierzbicki model and the Bai-Wierzbicki model, in simulating the fracture behaviour of stainless steel bolted lap shear connections. The ultimate goal is to determine the appropriate fracture model that can provide satisfactory simulation results with the minimum calibration requirement. To calibrate the fracture models, five different types of material test were performed, with all test specimens extracted from a single austenitic stainless steel plate of Grade 304. Thereafter, five connection tests, fabricated from the same steel plate as the material tests, were performed to examine the performances of different models in simulating typical connection failure modes (i.e. net section fracture, tearout and block shear). It was concluded that the Lee-Wierzbicki model, with 2 individual model parameters and only stress triaxiality-dependency, generated the most accurate simulation results compared with the other two models. The void growth model, with only one parameter calibrated by a tensile-dominant material test, failed to simulate the initiation of shear cracking and led to unconservative simulation results. Since the critical stress states in the connections were close to plane stress, the Bai-Wierzbicki model, with four parameters and both stress triaxiality- and Lode angle-dependencies, did not show improved accuracy than the Lee-Wierzbicki model. The results of the study indicate that a more sophisticated fracture model with greater number of model parameters may not necessarily lead to more accurate simulation results for certain engineering problems. It is further recommended that the selection of fracture model and calibration procedure (including material test specimens for calibration) should be based on the prevalent stress states in the investigated problems.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109756"},"PeriodicalIF":4.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338423","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

Research on HSLC fatigue fracture of HSS beam-column joints based on micromechanism 基于细观机理的HSS梁柱节点HSLC疲劳断裂研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-23 DOI: 10.1016/j.jcsr.2025.109751

Xiyue Liu , Yuanqing Wang , Yilin Yue , Zhaolong Luan , Manchao He , Yicong Ye

{"title":"Research on HSLC fatigue fracture of HSS beam-column joints based on micromechanism","authors":"Xiyue Liu , Yuanqing Wang , Yilin Yue , Zhaolong Luan , Manchao He , Yicong Ye","doi":"10.1016/j.jcsr.2025.109751","DOIUrl":"10.1016/j.jcsr.2025.109751","url":null,"abstract":"<div><div>This study investigated the high strain low cycle (HSLC) fatigue fracture behavior of Q460C high-strength steel (HSS) beam-column joints with different weld process details. Four specimens were designed: three featuring standard weld access holes and one with an improved access hole. Quasi-static tests revealed that cracking initiated in the heat-affected zone (HAZ) near the beam flange root weld toe for all specimens, attributed to stress concentration and weld heat input effects. Among specimens with standard access holes, those retaining the backing plate exhibited faster crack propagation post-initiation. Specimens with the backing plate removed demonstrated a 60–70 % increase in ductility factor and a 90 % enhancement in cumulative energy dissipation compared to those with the backing plate retained. The improved weld access hole further increased specimen ductility and energy dissipation capacity by approximately 21 %. To overcome the limitations of conventional methods in predicting cyclic fracture of structural steel, refined finite element models incorporating the micromechanics-based Cyclic Void Growth Model (CVGM) were developed for HSLC fatigue fracture prediction. The validity of the model was validated by the test results, which offering a novel approach for structural safety evaluation under earthquake.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109751"},"PeriodicalIF":4.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338589","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

Behavior of concrete-filled steel tube columns reinforced with steel-reinforced under local compression 局部受压条件下钢配筋钢管混凝土柱的受力性能

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-23 DOI: 10.1016/j.jcsr.2025.109750

Yu Yan , Xu Jin , Wei Chang , Jinli Wang , Wenzhong Zheng

{"title":"Behavior of concrete-filled steel tube columns reinforced with steel-reinforced under local compression","authors":"Yu Yan , Xu Jin , Wei Chang , Jinli Wang , Wenzhong Zheng","doi":"10.1016/j.jcsr.2025.109750","DOIUrl":"10.1016/j.jcsr.2025.109750","url":null,"abstract":"<div><div>CFST (concrete-filled steel tubular) columns were widely used in the lower load-bearing members of steel frames, trusses, arch structures, and beam bridges due to their excellent mechanical properties, which leads to local compression of the CFST sections. Therefore, to enhance the local compression performance of concrete-filled steel tubular columns, the SRCFST (steel-reinforced concrete-filled steel tube) column was proposed, and the local compression performance of such columns was investigated. For this paper, the ABAQUS/Standard software was utilized to conduct a series of investigations in the local compression behavior of short SRCFST columns. In addition, a total of 477 models were established to explore the effects of yield strength of the steel tube, yield strength of the structural steel-reinforced, wall thickness of the steel tube, cross-sectional area of the structural steel-reinforced, compressive strength of the concrete and ratio of the local compressive area on the stress distribution and bearing capacity of SRCFST short columns under local compression. Based on parameter analysis, it can be found that the effective confinement coefficient and ratio of the local compressive area are the two key parameters influencing the axial local compression load-axial deformation curve, and the critical values of the key parameters that influence the shape of the load-axial deformation curve of SRCFST short column were determined. Moreover, the stress mechanism and stress response of local compression specimens and axial compression specimens at different characteristic moments were analyzed. Finally, a simplified formula for predicting the load-bearing capacity for locally compressed SRCFST short columns was developed.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109750"},"PeriodicalIF":4.0,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144338590","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

Experimental and numerical studies on stress concentration factors of CHS-CFSHS X-joints under axial tension and in-plane bending loads 轴向拉伸和平面弯曲荷载作用下CHS-CFSHS x形节理应力集中系数的试验与数值研究

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-23 DOI: 10.1016/j.jcsr.2025.109746

Yan Diao, Hongzhi He, Jianfei Wang, Jun Wang, Yi Yang, Hua Jiang

引用次数: 0

Rack supported warehouses with reduced-section diagonals for improved dissipative seismic behaviour 机架支撑仓库与减少截面对角线改善耗散地震行为

IF 4 2区工程技术

Journal of Constructional Steel Research Pub Date : 2025-06-21 DOI: 10.1016/j.jcsr.2025.109735

Agnese Natali, Francesco Morelli, Walter Salvatore

{"title":"Rack supported warehouses with reduced-section diagonals for improved dissipative seismic behaviour","authors":"Agnese Natali, Francesco Morelli, Walter Salvatore","doi":"10.1016/j.jcsr.2025.109735","DOIUrl":"10.1016/j.jcsr.2025.109735","url":null,"abstract":"<div><div>Rack supported warehouses are structures proven to be vulnerable to seismic action as currently designed, being prone to quasi-brittle failures that mainly involve key components. This paper presents a dedicated design approach for the transversal frames of these warehouses, with the main objective of exploiting potential sources of ductility (yielding of diagonals under tensile force) while protecting the non-dissipative components and maintaining the structural configuration and technological components typical of these structures. To this end, the diagonal's cross-section is reduced in specific areas, allowing for yielding and seismic dissipation, while ensuring the overstrength of the connection. Specific guidelines are also provided to design the reduced section portions to achieve the necessary ductility level, both locally and globally, and to limit the slenderness of the profile. The potential of the approach is evaluated by designing and numerically assessing the seismic vulnerability of a case study and comparing the obtained behaviour to that of the same structure designed using the current approach. The results show that the new approach allows for the protection of diagonal connections and non-dissipative elements for seismic intensities higher than the design level. An experimental campaign on the reduced-section braces is an ongoing activity necessary to assess the effective behaviour and to provide general design criteria that also account for geometrical and material imperfections arising from fabrication and assembly processes.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109735"},"PeriodicalIF":4.0,"publicationDate":"2025-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144335899","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