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A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 10-22 doi: 10.1007/s11709-019-0547-1

Abstract: The structural behavior of prestressed high strength steel (HSS) tubular members is investigated throughNumerical models are developed and validated against published experimental data on HSS tubular membersThe effect of the presence or absence of grouting on the strength and ductility of the members is alsoAs anticipated, prestressing enhances the load-bearing capacity for the tensile members, whereas it isDesign guidance for tensile and compressive prestressed tubular members is also provided.

Keywords： finite element     prestressing     tubular members     grout     high strength steel    

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Moment-curvature relationship of FRP-concrete-steel double-skin tubular members

Mingxue LIU, Jiaru QIAN

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 25-31 doi: 10.1007/s11709-009-0012-7

Abstract: specimens to study the flexural behavior of fiber reinforced polymer (FRP)-concrete-steel double-skin tubularmembers (DSTMs).

Keywords： fiber reinforced polymer (FRP)     concrete     steel     double-skin tubular members (DSTMs)     moment-curvature curve    

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Experiment on aluminum alloy members under axial compression

Xiaonong GUO,Shuiping LIANG,Zuyan SHEN

Frontiers of Structural and Civil Engineering 2015, Volume 9, Issue 1,   Pages 48-64 doi: 10.1007/s11709-014-0271-9

Abstract: To improve the design methods of Chinese aluminum alloy members, experiment of 63 profiled aluminum alloymembers, made of Chinese aluminum alloy 6061-T6, under axial compression is conducted in this paper.Furthermore, for the purpose of creating column curves, the aluminum alloy members under the axial compression

Keywords： aluminum alloy     column curve     compression members     overall stability coefficient    

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Performance study on T-stub connected semi-rigid joint between rectangular tubular columns and H-shaped

Guochang LI, Hongping YU, Chen FANG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 296-303 doi: 10.1007/s11709-013-0217-7

Abstract: This paper investigates the performance of T-stub connected semi-rigid joint of rectangular tubular columns

Keywords： rectangular tubular columns     T-stub     semi-rigid     nonlinear finite element analysis     moment-rotation curves    

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Estimating moment capacity of ferrocement members using self-evolving network

Abdussamad ISMAIL

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 926-936 doi: 10.1007/s11709-019-0527-5

Abstract: model is meant to serve as a simple but reliable tool for estimating the moment capacity of ferrocement membersdata indicated that the models are capable of accurately estimating the moment capacity of ferrocement members

Keywords： ferrocement     moment capacity     self-evolving neural network    

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Intermediate HSS bracing members during seismic excitations: modeling, design, and behavior

Madhar HADDAD

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 1,   Pages 148-162 doi: 10.1007/s11709-016-0375-5

Abstract: Concentric hollow structural section (HSS) bracing members are used frequently in steel framed structuralstress-strain curves are directly obtained from tests on stub-columns extracted from the full scale HSS bracing members

Keywords： HSS     FEM     stress-strain curves     damage model    

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Numerical modelling of reinforced concrete flexural members strengthened using textile reinforced mortars

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 649-668 doi: 10.1007/s11709-023-0919-4

Abstract: Externally bonded (EB) and near-surface mounted (NSM) bonding are two widely adopted and researched strengthening methods for reinforced-concrete structures. EB composite substrates are easy to reach and repair using appropriate surface treatments, whereas NSM techniques can be easily applied to the soffit and concrete member sides. The EB bonded fiber-reinforced polymer (FRP) technique has a significant drawback: combustibility, which calls for external protective agents, and textile reinforced mortar (TRM), a class of EB composites that is non-combustible and provides a similar functionality to any EB FRP-strengthened substrate. This study employs a finite element analysis technique to investigate the failing failure of carbon textile reinforced mortar (CTRM)-strengthened reinforced concrete beams. The principal objective of this numerical study was to develop a finite element model and validate a set of experimental data in existing literature. A set of seven beams was modelled and calibrated to obtain concrete damage plasticity (CDP) parameters. The predicted results, which were in the form of load versus deflection, load versus rebar strain, tensile damage, and compressive damage patterns, were in good agreement with the experimental data. Moreover, a parametric study was conducted to verify the applicability of the numerical model and study various influencing factors such as the concrete strength, internal reinforcement, textile roving spacing, and externally-applied load span. The ultimate load and deflection of the predicted finite element results had a coefficient of variation (COV) of 6.02% and 5.7%, respectively. A strain-based numerical comparison with known methods was then conducted to investigate the debonding mechanism. The developed finite element model can be applied and tailored further to explore similar TRM-strengthened beams undergoing debonding, and the preventive measures can be sought to avoid premature debonding.

Keywords： fiber reinforced polymer     textile reinforced mortar     finite element analysis     concrete damage plasticity     calibration and validation     parametric study    

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Thermal response of steel framing members in open car park fires

Xia YAN; Marion CHARLIER; Thomas GERNAY

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 9,   Pages 1071-1088 doi: 10.1007/s11709-022-0879-0

Abstract: However, this design approach requires an accurate assessment of temperatures in structural members exposedThis paper describes a numerical study on the thermal exposure on steel framing members in open car parkDetailed temperature distributions obtained in the steel members can be used to complete efficient structural

Keywords： open car park     localized fire     steel frame     numerical modeling     computational fluid dynamics    

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Theoretical study on flow and radiation in tubular solar photocatalytic reactor

Frontiers in Energy 2021, Volume 15, Issue 3,   Pages 687-699 doi: 10.1007/s11708-021-0773-9

Abstract: based on the mixture flow model, an optimized six-flux model is first established and applied to the tubular

Keywords： photocatalytic hydrogen photoreactor     nume- rical simulation     solar energy     flow model     radiation model    

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Stress-related ecophysiology of members of the genus

Om Prakash, Stefan J. Green, Pooja Singh, Puja Jasrotia, Joel E. Kostka

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 2, doi: 10.1007/s11783-020-1315-0

Abstract: Abstract • Rhodanobacter spp. are dominant in acidic, high nitrate and metal contaminated sites. • Dominance of Rhodanobacter is likely due to tolerance to low pH and heavy metals. • High organic content increases stress tolerance capacity. • Longer incubation time is critical for accurate assessment of MIC (various stresses). This work examines the physiologic basis of stress tolerance in bacterial strains of the genus Rhodanobacter that dominate in the acidic and highly metal contaminated near-source subsurface zone of the Oak Ridge Integrated Field Research Challenge (ORIFRC) site. Tolerance of R. denitrificans to levels of different stresses were studied in synthetic groundwater medium and R2A broth. Two strains of R. denitrificans, strains 2APBS1T and 116-2, tolerate low to circumneutral pH (4–8), high Uranium (1 mmol/L), elevated levels of nitrate (400 mmol/L) and high NaCl (2.5%). A combination of physiologic traits, such as growth at low pH, increased growth in the presence of high organics concentration, and tolerance of high concentrations of nitrate, NaCl and heavy metals is likely responsible for dominance of Rhodanobacter at the ORIFRC site. Furthermore, extended incubation times and use of low carbon media, better approximating site groundwater conditions, are critical for accurate determination of stress responses. This study expands knowledge of the ecophysiology of bacteria from the genus Rhodanobacter and identifies methodological approaches necessary for acquiring accurate tolerance data.

Keywords： Rhodanobacter     Uranium     Nitrate     Metals     Stress tolerance    

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Preventive effect of Shenkang injection against high glucose-induced senescence of renal tubular cells

Biqiong Fu, Jie Yang, Jia Chen, Lirong Lin, Kehong Chen, Weiwei Zhang, Jianguo Zhang, Yani He

Frontiers of Medicine 2019, Volume 13, Issue 2,   Pages 267-276 doi: 10.1007/s11684-017-0586-8

Abstract: This study aimed to investigate the protective effect of SKI against high glucose (HG)-induced renal tubularanti-senescence molecules klotho, sirt1, and peroxisome proliferator-activated receptor- in renal tubularSKI may be a novel strategy for protecting against HG-induced renal tubular cell senescence in treatment

Keywords： Shenkang injection     senescence     renal tubular epithelial cells     diabetic nephropathy    

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Study on the interfacial shear behavior of steel reinforced concrete (SRC) members with stud connectors

Zihua ZHANG,Junhua LI,Lei ZHANG,Kai YU

Frontiers of Structural and Civil Engineering 2014, Volume 8, Issue 2,   Pages 140-150 doi: 10.1007/s11709-014-0250-1

Abstract: in order to study the failure mode, load-slip relationship and the interfacial shear transfer of SRC members

Keywords： steel reinforced concrete (SRC)     short column     stud connector     after fire     interfacial shear transfer    

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Factors affecting production of nonaqueous peracetic acid in tubular packed reactors

ZHANG Tengyun, FAN Hongbo, ZHONG Li, CHUANG Karl

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2,   Pages 196-203 doi: 10.1007/s11705-008-0037-9

Abstract: The synthesis of nonaqueous peracetic acid in acetone by acetaldehyde oxidation was carried out in a tubular
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Review of the crushing response of collapsible tubular structures

Vivek PATEL, Gaurav TIWARI, Ravikumar DUMPALA

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3,   Pages 438-474 doi: 10.1007/s11465-019-0579-1

Abstract: Studies on determining and analyzing the crushing response of tubular structures are of significant interestSeveral aspects of tubular structures, such as geometry, material, configuration, and hybrid structurethe important findings of extensive research on understanding the crushing response of thin-walled tubulartriggering mechanism on initiating plastic deformation, such as cutouts and grooves, on the surface of tubular

Keywords： monolithic structure     crashworthiness     energy absorber     static and dynamic loadings     multicellular tube structure     filled tube    

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numerical investigations of the compressive behavior of carbon fiber-reinforced polymer-strengthened tubular

Peng DENG, Boyi YANG, Xiulong CHEN, Yan LIU

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 5,   Pages 1215-1231 doi: 10.1007/s11709-020-0663-y

Abstract: A method for strengthening damaged tubular steel T-joints under axial compression by wrapping them withthe effects of different geometric and strengthening parameters on the load capacity of strengthened tubularwrapping, and indicated the optimal CFRP strengthening thickness and wrapping orientation according to tubularThe findings of this study can be used to inform improved CFRP strengthening of damaged tubular steel

Keywords： tubular T-joint     carbon fiber-reinforced polymer     degree of damage     numerical analysis     equivalent plastic    

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Title Author Date Type Operation

A numerical study of prestressed high strength steel tubular members

Michaela GKANTOU, Marios THEOFANOUS, Charalampos BANIOTOPOULOS

Journal Article

Moment-curvature relationship of FRP-concrete-steel double-skin tubular members

Mingxue LIU, Jiaru QIAN

Journal Article

Experiment on aluminum alloy members under axial compression

Xiaonong GUO,Shuiping LIANG,Zuyan SHEN

Journal Article

Performance study on T-stub connected semi-rigid joint between rectangular tubular columns and H-shaped

Guochang LI, Hongping YU, Chen FANG

Journal Article

Estimating moment capacity of ferrocement members using self-evolving network

Abdussamad ISMAIL

Journal Article

Intermediate HSS bracing members during seismic excitations: modeling, design, and behavior

Madhar HADDAD

Journal Article

Numerical modelling of reinforced concrete flexural members strengthened using textile reinforced mortars

Journal Article

Thermal response of steel framing members in open car park fires

Xia YAN; Marion CHARLIER; Thomas GERNAY

Journal Article

Theoretical study on flow and radiation in tubular solar photocatalytic reactor

Journal Article

Stress-related ecophysiology of members of the genus

Om Prakash, Stefan J. Green, Pooja Singh, Puja Jasrotia, Joel E. Kostka

Journal Article

Preventive effect of Shenkang injection against high glucose-induced senescence of renal tubular cells

Biqiong Fu, Jie Yang, Jia Chen, Lirong Lin, Kehong Chen, Weiwei Zhang, Jianguo Zhang, Yani He

Journal Article

Study on the interfacial shear behavior of steel reinforced concrete (SRC) members with stud connectors

Zihua ZHANG,Junhua LI,Lei ZHANG,Kai YU

Journal Article

Factors affecting production of nonaqueous peracetic acid in tubular packed reactors

ZHANG Tengyun, FAN Hongbo, ZHONG Li, CHUANG Karl

Journal Article

Review of the crushing response of collapsible tubular structures

Vivek PATEL, Gaurav TIWARI, Ravikumar DUMPALA

Journal Article

numerical investigations of the compressive behavior of carbon fiber-reinforced polymer-strengthened tubular

Peng DENG, Boyi YANG, Xiulong CHEN, Yan LIU

Journal Article