Journal of Constructional Steel Research最新文献

{"title":"Experimental investigation of high-temperature mechanical and creep properties of high-strength steel Q500qE","authors":"Bin Qiang ,&nbsp;Dian Lei ,&nbsp;Hong Yang ,&nbsp;Di Xu ,&nbsp;Jia Huang ,&nbsp;Lei Wang ,&nbsp;Yadong Li","doi":"10.1016/j.jcsr.2025.109732","DOIUrl":"10.1016/j.jcsr.2025.109732","url":null,"abstract":"<div><div>This study investigates the high-temperature mechanical properties and creep behavior of high-strength steel (HSS) Q500qE. High-temperature tensile tests (20 °C–700 °C) were conducted to determine reduction factors for yield strength, elastic modulus, ultimate strength, and elongation at break. At 700 °C, yield strength, elastic modulus, and ultimate strength decreased by 80 %, 53 %, and 81 %, respectively, while elongation at break increased by 210 %. New predictive equations with high regression coefficients were developed to estimate these reduction factors. High-temperature creep tests at 400 °C–600 °C under stress ratios of 0.4–1.0 were analyzed using the Norton-Bailey model, calibrated through nonlinear fitting. Results indicate that increasing temperature and stress ratio accelerate creep strain and shorten creep life. At 600 °C, even with a low stress ratio of 0.5, the specimen entered the accelerating creep stage and fractured within 549 min. The proposed predictive equations and calibrated model offer reliable estimates of Q500qE's high-temperature performance, providing valuable guidance for its application in elevated-temperature environments.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109732"},"PeriodicalIF":4.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314067","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}

{"title":"A comprehensive failure analysis of corroded high-strength steel pipelines under seismic-induced landslide","authors":"Wei Liu ,&nbsp;Peng Zhang ,&nbsp;Siming Liu ,&nbsp;Yunfei Huang ,&nbsp;Tian Xu ,&nbsp;Ming Zhao","doi":"10.1016/j.jcsr.2025.109729","DOIUrl":"10.1016/j.jcsr.2025.109729","url":null,"abstract":"<div><div>In this work, a nonlinear finite element (FE) model was developed to investigate the synergistic effect of corrosion and seismic-induced landslides on the failure behavior of high-strength steel pipelines. This work integrated a permanent ground deformation (PGD) function and uniform corrosion modeling methodology. The failure mechanism, process, and path of high-strength steel pipelines under the action of corrosion, internal pressure, and landslide displacement were investigated. Findings indicated that the landslide impact caused significant stress concentrations at the corrosion defect, triggering failure. The corroded pipeline exhibited 8–54 % higher maximum von Mises stress in comparison with the intact pipeline. Among the defect parameters, corrosion depth (<em>d</em>/<em>t</em> = 0.1–0.5) had a more substantial impact on the pipeline's structural integrity than corrosion length (<em>l</em>/<span><math><msqrt><mi>Dt</mi></msqrt></math></span>=0.5–2.5) and width (<em>CW</em> = 0.01–0.05). The combined effects of landslides, corrosion, and internal pressure further accelerated pipeline failure. Additionally, failure was most likely to occur at the defect site when the defects was located circumstantially at the landslide-opposing side (95^o), and axially at the shear area center or near the landslide area center. In other cases, the failure location shifted to a pipe's undamaged area at the landslide center.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109729"},"PeriodicalIF":4.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314068","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}

{"title":"Plug-in seismic isolation joints in modular steel structures: Experimental and numerical evaluation","authors":"Junfen Yang ,&nbsp;Tianmeng Tong ,&nbsp;Zhuang Liu ,&nbsp;Panpan Liu","doi":"10.1016/j.jcsr.2025.109673","DOIUrl":"10.1016/j.jcsr.2025.109673","url":null,"abstract":"<div><div>This paper introduces an insertable seismic-isolation and energy-dissipation connection joint tailored for modular steel structure buildings. To explore the seismic isolation and energy-dissipation performance of this innovative joint, cyclic loading tests were conducted on a two-story steel frame model equipped with the proposed joints. This study systematically analyzed the deformation patterns and seismic behaviors of the joints and established a mechanical model through theoretical analysis. The test results show that the proposed joints exhibit excellent energy dissipation and damping capabilities, which enables them to enhance the seismic resistance of modular steel structures effectively. In addition, the ETABS software was used to conduct modal decomposition response spectrum analysis and time-history analysis on a modular building. The simulation results show that introducing seismic isolation joints increases the average natural period of the structure under seismic action by 244%. Further analysis reveals that the isolation structure has a more significant damping effect on the lower floors compared to the non-isolation structure, and the damping effect under rare earthquakes is better than that under design earthquakes. Although the calculation results of the time-history analysis method are more conservative than those of the modal decomposition response spectrum method, both methods indicate that the new seismic isolation joints have a significant damping effect and can effectively improve the seismic performance of the structure under seismic action.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109673"},"PeriodicalIF":4.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314071","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}

{"title":"Impact performance of concrete-filled steel tubular columns under debris-flow-induced boulder impacts","authors":"Ben Mou ,&nbsp;Yongchao Guo ,&nbsp;Le Huang","doi":"10.1016/j.jcsr.2025.109671","DOIUrl":"10.1016/j.jcsr.2025.109671","url":null,"abstract":"<div><div>Western China is considered extremely active and hazardous areas prone to debris flows. These significantly threaten the safety of high-speed railway bridges. High-speed railway bridge piers usually adopt circular concrete-filled steel tubular (CCFST) columns. This paper investigates the dynamic responses of circular hollow steel tubular (CCHST) columns and CCFST columns under lateral impact loading, simulating the boulder impacts typical of debris flow conditions. Drop hammer tests were conducted and the key test parameters included hammer weight, height, indenter radius, built-in reinforcement bars (with or without), shear-span ratio, column diameter-to-thickness ratio, and dimensions. Additionally, the finite element models of CCFST and CCHST columns were established and validated against experimental results. The results revealed that CCFST columns exhibit superior lateral impact resistance, good plastic deformations, and high energy dissipation capacity. The built-in reinforcement bars improved lateral impact resistance capacity. The mechanical behavior of specimens under lateral impact loading was precisely forecasted by the developed finite element model.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109671"},"PeriodicalIF":4.0,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314069","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}

{"title":"Performance-based failure risk evaluation of transmission tower-line systems subjected to sequential earthquakes","authors":"Juncai Liu ,&nbsp;Li Tian ,&nbsp;Rui Zhang ,&nbsp;Zhen Ma ,&nbsp;Meng Yang","doi":"10.1016/j.jcsr.2025.109730","DOIUrl":"10.1016/j.jcsr.2025.109730","url":null,"abstract":"<div><div>Transmission tower-line systems (TTLSs) are critical components of electricity transmission networks and are typically designed to withstand initial damaging earthquake events without considering the effects of subsequent aftershocks. Subsequent aftershocks could cause additional damage to the mainshock-damaged structures, resulting in further degradation of their strength and stiffness. To quantify the adverse effects of aftershocks, this paper conducts a probabilistic investigation of the seismic fragility and risk of a TTLS subjected to sequential earthquakes. A selection of actual mainshock-aftershock (MSAS) sequences is initially drawn from an international strong motion database, and various techniques for artificially generating sequential earthquakes-including repetition, stochastic, and attenuation construction methods-are introduced. Subsequently, a comprehensive series of nonlinear dynamic analyses on the numerical model of the TTLS is conducted using an ensemble of scaled ground motions to capture the structural damage evolution from elastic behavior to failure. The seismic safety of the TTLS is evaluated through seismic demand models, fragility curves, and seismic risk probabilities. The results emphasize that subsequent earthquakes lead to a deterioration in the seismic performance of the TTLS and the decrease is more than 10 %. Additionally, the attenuation construction method emerges as a viable approximation for real MSAS sequences in the seismic fragility and risk analysis of the TTLS. This research contributes to an understanding of the probabilistic assessment of TTLSs under MSAS scenarios.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109730"},"PeriodicalIF":4.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307525","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}

{"title":"Study on axial compression mechanical properties of circular carbon steel-concrete‑aluminum alloy composite columns","authors":"Zhengtao Zhang ,&nbsp;Bing Li ,&nbsp;Bo Zhou ,&nbsp;Hao Liu","doi":"10.1016/j.jcsr.2025.109733","DOIUrl":"10.1016/j.jcsr.2025.109733","url":null,"abstract":"<div><div>To evaluate the axial compression performance of circular carbon steel-concrete‑aluminum alloy composite columns, the axial compression test of 8 specimens was carried out, the parameters involved in the test mainly included the cross-sectional diameter, concrete type (normal concrete and lightweight concrete), and the wall thickness of the aluminum alloy tube. Subsequently, the failure modes, load-strain curves, lateral deformation coefficients, and load-axial displacement curves of the specimens were analyzed, clarifying the influence of variations in experimental parameters on bearing capacity, axial compression stiffness, and ductility. A full-scale finite element model was established by using ABAQUS to study the stress distribution of typical specimens. The influence degree and rules of various parameter changes on the axial compression mechanical performance indicators were analyzed and summarized, and furthermore, the equation for determining axial compressive strength for circular carbon steel-concrete‑aluminum alloy composite columns was proposed. The research results show that the deformation of components of specimen is consistent under axial compression load. The change in cross-sectional size have a notable effect on the axial compression mechanical performance indicators, when the cross-sectional size increases from 200 mm to 300 mm and 400 mm respectively, the bearing capacity of specimens with normal concrete (lightweight concrete) as sandwich concrete increases by 135.9 % and 329.3 % (91.6 % and 204.7 %), the axial compression stiffness increases by 1.93 times and 9.14 times (1.69 times and 8.0 times), and the ductility decreases by 30.3 % and 38.4 % (33.3 % and 40.1 %) respectively. Through conducting simulations with finite elements, the finding is that before reaching the ultimate bearing capacity, there is almost no interaction between the aluminum alloy tube and the sandwich concrete, while the contact stress between the steel tube and the sandwich concrete gradually increases with the increase of axial displacement, suggesting that the steel tube exerts a good confinement influence on the sandwich concrete. The calculation method of bearing capacity proposed based on the technical specifications for concrete-filled steel tubular structures and the introduction of the combined strength influence coefficient can reasonably predicted the axial compression bearing capacity of circular carbon steel-concrete‑aluminum alloy composite columns.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109733"},"PeriodicalIF":4.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307468","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}

{"title":"Resilience analysis of smart Steel Moment Resisting Frame under seismic-LPG tank explosion","authors":"Sardasht S. Weli ,&nbsp;Sara Muhammad Elqudah ,&nbsp;László Gergely Vigh","doi":"10.1016/j.jcsr.2025.109681","DOIUrl":"10.1016/j.jcsr.2025.109681","url":null,"abstract":"<div><div>This study investigates the probabilistic resilience analysis of smart Steel Moment-Resisting Frame structures (MRFs) equipped with Nickel-Titanium Shape-Memory Alloy (NiTi SMA) connections. The smart connections are designed and developed to feature blast resistance characteristics. A probabilistic resilience approach is employed to quantify the resilience of the proposed smart Steel Moment-Resisting Frame structures (MRFs). This approach involves assessing the structures’ performance under multi-hazard events while maintaining their essential functions. Single-hazard scenarios of seismic and blast loading were used as a benchmark to evaluate the performance of smart frames under multi-hazard conditions. The methodology integrates results from fragility analysis, which provides insights into the structural vulnerability under different hazard scenarios. From the fragility curves generated, vulnerability curves are derived which are the basis for calculating the loss function and the resilience index. A reference model is prepared with steel-bolted rigid connections. The structural response is evaluated for the seismic-blast triggered in the sense of a functionality curve. The results highlighted the role of NiTi SMA connections in reducing the damages induced by seismic-blast-triggered gas explosion events, providing enhanced structural resilience and less vulnerability to multi-hazard scenarios. The results also show that the proposed Eurocode-complying key design procedures are considerably efficient in improving the stability and resilience of the structure.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109681"},"PeriodicalIF":4.0,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307526","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}

{"title":"Unified cyclic stress–strain model for square and rectangular UHPC-filled stainless-steel tubular columns","authors":"Zhuang Zhao ,&nbsp;Yang Wei ,&nbsp;Mingmin Ding ,&nbsp;Yu Lin ,&nbsp;Kaiqi Zheng","doi":"10.1016/j.jcsr.2025.109731","DOIUrl":"10.1016/j.jcsr.2025.109731","url":null,"abstract":"<div><div>Cross-sectional shape has a notable effect on the cyclic axial stress–strain curves of ultrahigh-performance concrete (UHPC)-filled stainless-steel tube (UHPCFSST) columns. Currently, no unified model can describe this influence mathematically. In this study, UHPCFSST samples having two types of cross-sectional shapes i.e. square and rectangular shapes with various dimensions, were designed, and cyclic axial compression tests were conducted. The key investigated mechanical behaviors of UHPCFSSTs include failure modes and cyclic stress–strain relationships. The mechanisms behind the differences in the plastic index and unloading stiffness degradation between square UHPCFSSTs and rectangular UHPCFSSTs were analyzed. Based on the test data, models for plastic strain, new point strain, and return strain for square and rectangular UHPCFSSTs were established. Considering the effects of cross-sectional shape and confinement, the stress–strain models for unloading and reloading paths were proposed. This resulted in the development of a unified cyclic axial compression stress–strain model applicable to UHPCFSSTs with square and rectangular cross-sectional shapes. The proposed model exhibits high accuracy and applicability, effectively quantifying the impact of cross-sectional shapes on the cyclic axial compression stress–strain curves of UHPCFSSTs.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109731"},"PeriodicalIF":4.0,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144290527","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}

{"title":"Numerical and experimental reassessment of Eurocode 3 design rules for cellular beam end-posts","authors":"Georgios Psyrras ,&nbsp;Konstantinos Daniel Tsavdaridis ,&nbsp;R. Mark Lawson","doi":"10.1016/j.jcsr.2025.109723","DOIUrl":"10.1016/j.jcsr.2025.109723","url":null,"abstract":"<div><div>This paper investigates the end-post behaviour of cellular beams focusing on the failure mechanisms subject to shear adjacent to the connections. Three cellular beams were tested to failure in a companion paper and their behaviours were modelled and validated herein using Abaqus. The cellular beams were connected to the columns through a bolted end-plate at one end and a bolted fin-plate at the other end. Finite element (FE) analyses were carried out for end-posts with and without notches, and web openings with half infill plates for cases where the minimum end-post width requirements were not satisfied. It was found that the FE results were in good agreement with the test results while both gave significantly higher failure loads than the design predictions provided by BS EN 1993-1-13. A parametric study was carried out on each connection side and in total 160 end-post models were examined. It was concluded that the connection type not only affected the end-post shear resistance but also influenced the failure mode. It was shown that using a half infill plate at the first opening can greatly increase the end-post's shear resistance.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109723"},"PeriodicalIF":4.0,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298667","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}

{"title":"Flexural behavior of externally prestressed steel-UHPC-NC composite beams in negative moment regions","authors":"Yan Zheng ,&nbsp;Junxiang Zhu ,&nbsp;Hailin Yang ,&nbsp;Zemang Liang ,&nbsp;Wenchi Li","doi":"10.1016/j.jcsr.2025.109727","DOIUrl":"10.1016/j.jcsr.2025.109727","url":null,"abstract":"<div><div>External prestressing and UHPC could significantly improve the mechanical performance of composite beams in the negative moment regions. The flexural behavior of externally prestressed steel-UHPC (ultra-high performance concrete)-NC (normal concrete) composite beams (EPSUNCB) under negative moment was studied through experimental and numerical investigation in this paper. Firstly, three externally prestressed composite beams (EPSNCB, EPSUCB, EPSUNCB) of different concrete flange materials (NC, UHPC, UHPC-NC) and one non-prestressed UHPC-NC composite beam (SUNCB) were experimentally studied under negative moment. The results indicated that the failure modes of the composite beams were characterized by compression buckling of the lower edges of the steel girders and the appearance of bending cracks in the concrete flanges. The cracking load of the prestressed composite beams increased by 118.8 % compared to the non-prestressed composite beam. The UHPC flange resulted in a 148.3 % and 2.5 % increase in cracking load and ultimate load, respectively, compared to the NC flange composite beam. Besides, finite element simulation revealed that increasing initial prestress significantly improved the crack resistance of the composite beams. The ultimate flexural capacity of the composite beams was particularly affected by steel girder strength. Furthermore, considering the tensile strength of UHPC and the strain-hardening effect of steel, a calculation formula for the ultimate flexural capacity of composite beams was proposed and validated through experimental and numerical simulation results.</div></div>","PeriodicalId":15557,"journal":{"name":"Journal of Constructional Steel Research","volume":"234 ","pages":"Article 109727"},"PeriodicalIF":4.0,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144298666","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}