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Nonlinear experimental response of non-conventional composite steel and concrete connection

Tobia ZORDAN, Bruno BRISEGHELLA

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 1,   Pages 42-49 doi: 10.1007/s11709-008-0058-y

Abstract: An experiment was carried out on a set of full-scale specimens of a non-conventional connection between a concrete column and a composite steel and concrete beam defined on the basis of a number of requirements. The proposed connection, conceived in the ambit of semi-rigid joints, is aimed at combining general ease of construction with a highly simplified assembly procedure with a satisfying transmission of hogging moment at supports in continuous beams. For this purpose, the traditional shear studs used at the interface between the steel beam and the upper concrete slab, are also employed at the ends of the steel profiles welded horizontally to the end plates. The test is aimed at investigating the hogging moment response of the connection under incremental loads until failure.

Keywords： composite connections     nonlinear behaviour     hogging moment     monotonic tests    

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Investigation of the interior RC beam-column joints under monotonic antisymmetrical load

Fei GAO, Zhiqiang TANG, Biao HU, Junbo CHEN, Hongping ZHU, Jian MA

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1474-1494 doi: 10.1007/s11709-019-0572-0

Abstract: The paper presents numerical findings of reinforced concrete interior beam-column joints under monotonic

Keywords： RC beam-column joint     reinforcement ratio in joint core     axial compression ratio     finite element     test    

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Study of base friction simulation tests based on a complicated engineered bridge slope

Liu HE, Guang WU, Hua WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 393-397 doi: 10.1007/s11709-012-0174-6

Abstract: both its natural state and during excavation loading is qualitatively analyzed through base friction tests

Keywords： base friction test     slope stability evaluation     bridge slope    

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Strain localization analyses of idealized sands in biaxial tests by distinct element method

Mingjing JIANG, Hehua ZHU, Xiumei LI,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 2,   Pages 208-222 doi: 10.1007/s11709-010-0025-2

Abstract: presents a numerical investigation on the strain localization of an idealized sand in biaxial compression testsThe study shows that strain localization of the granular material in the tests proceeds with localizations

Keywords： idealized sand     strain localization     numerical analyses     distinct element method (DEM)    

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Extension of pilot tests of cyanide elimination by ozone from blast furnace gas washing water through

Ismael Matino, Valentina Colla, Teresa A. Branca

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 718-730 doi: 10.1007/s11705-018-1771-2

Abstract: Pilot tests were extended, process knowledge was enhanced and suggestions were obtained.

Keywords： blast furnace     cyanide removal     gas washing water     modeling and simulation     ozonation    

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Research on New Technology for Sandy Slope Safety Protection

Niu Xiaodi,Yang Guangqing and Liu Weichao

Strategic Study of CAE 2017, Volume 19, Issue 6,   Pages 86-91 doi: 10.15302/J-SSCAE-2017.06.013

Abstract: In order to study the effect of sand consolidation, proportion optimization tests, penetration tests,wetting-drying cycle tests, and field tests were carried out.

Keywords： sandy slope     sand consolidation agent     laboratory tests     field tests    

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Semi-industrial Tests of Pressure Leaching on High-iron Sphalerite Concentrate

Wang Jikun,Zhou Tingxi,Wu Jinmei

Strategic Study of CAE 2005, Volume 7, Issue 1,   Pages 60-64

Abstract:

High-iron sphalerite was subjected to two-stage pressure leaching. The leaching rate of zinc and iron was 97.09 % and 15.2 % respectively. The yield of elemental sulphur was 93 % . The residual acid in the leachate was 3.95 g/L. By easy neutralization and purification, zinc sulphate solution was obtained, which would be sent to the zinc electrowinning operation. For the purpose of comparison, one-stage pressure leaching on average sphalerite was conducted. Leaching rate of zinc and iron was 98.09 % and 37.88 % respectively, and the yield of elemental sulphur was 96 % . The leachate with higher acid content (46.4 g/L) could be integrated into the existing traditional hydrometallurgical process of zinc

Keywords： high-iron sphalerite     pressure leaching     semi-industrial tests     elemental sulphur    

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Seismic tests of post-tensioned self-centering building frames with column and slab restraints

Chung-Che CHOU, Jun-Hen CHEN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 323-334 doi: 10.1007/s11709-011-0119-5

Abstract: The method is verified by cyclic tests of a full-scale, two-bay by one-story PT frame.Shaking table tests were conducted on a reduced-scale, two-by-two bay one-story specimen, which comprisesThe PT frame and gravitational frames are self-centering throughout the tests, responding in phase with

Keywords： post-tensioned frame     frame expansion     column restraint     sliding slab     frame test     shake table test    

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enhancement for implementation in purification of modal frequency for extremely noisy ambient vibration tests

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 2,   Pages 446-472 doi: 10.1007/s11709-019-0605-8

Abstract: iterative filtering algorithm for identification of natural frequencies during ambient wind vibrational tests

Keywords： ambient vibration test     high level noise     iterative signal enhancement     wavelet     cross and autocorrelation of wavelets    

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Axial compression tests and numerical simulation of steel reinforced recycled concrete short columns

Hui MA; Fangda LIU; Yanan WU; Xin A; Yanli ZHAO

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 7,   Pages 817-842 doi: 10.1007/s11709-022-0844-y

Abstract: To research the axial compression behavior of steel reinforced recycled concrete (SRRC) short columns confined by carbon fiber reinforced plastics (CFRP) strips, nine scaled specimens of SRRC short columns were fabricated and tested under axial compression loading. Subsequently, the failure process and failure modes were observed, and load-displacement curves as well as the strain of various materials were analyzed. The effects on the substitution percentage of recycled coarse aggregate (RCA), width of CFRP strips, spacing of CFRP strips and strength of recycled aggregate concrete (RAC) on the axial compression properties of columns were also analyzed in the experimental investigation. Furthermore, the finite element model of columns which can consider the adverse influence of RCA and the constraint effect of CFRP strips was founded by ABAQUS software and the nonlinear parameter analysis of columns was also implemented in this study. The results show that the first to reach the yield state was the profile steel in the columns, then the longitudinal rebars and stirrups yielded successively, and finally RAC was crushed as well as the CFRP strips was also broken. The replacement rate of RCA has little effect on the columns, and with the substitution rate of RCA from 0 to 100%, the bearing capacity of columns decreased by only 4.8%. Increasing the CFRP strips width or decreasing the CFRP strips spacing could enhance the axial bearing capacity of columns, the maximum increase was 10.5% or 11.4%, and the ductility of columns was significantly enhanced. Obviously, CFRP strips are conducive to enhance the axial bearing capacity and deformation capacity of columns. On this basis, considering the restraint effect of CFRP strips and the adverse effects of RCA, the revised formulas for calculating the axial bearing capacity of SRRC short columns confined by CFRP strips were proposed.

Keywords： steel reinforced recycled concrete     CFRP strips     short columns     axial compression behavior     recycled aggregate concrete    

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Pandemic Woes: Antigen Tests to the Rescue?

Peter Weiss

Engineering 2021, Volume 7, Issue 1,   Pages 3-5 doi: 10.1016/j.eng.2020.12.002

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Analysis of factors affecting passengers ’ mountain sickness basedon nonparamertric tests

Chang Haijuan,Liu Meng,Pang Liping,Yang Peng,Wang Jun

Strategic Study of CAE 2009, Volume 11, Issue 2,   Pages 65-69

Abstract:

2 882 samples were taken in Qinghai- Tibet railway cars, and 1 693 samples were taken out randomly, then the factors that may affect the ability of individual' s hypoxia- resistant were analyzed in statistics. This paper has done this work by nonparametric statistics and correlation analysis , and got the conclusion that five factors, which are mountain sickness one have suffered before, sex, smoking frequency, bodily form and age, influence individual' s hypoxia- resistant ability. The conclusion makes a good sense, as it can provide statistics foundation for continuous iatrical research, while giving directive suggestion to reduce passengers' mountain sickness, and providing warranty for the design and amelioration of oxygen supplying system in Qinghai- Tibet railway cars .

Keywords： mountain sickness     impacting factors     Qinghai- Tibet railway     nonparametric tests     individual’ shypoxia    

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Model testing of tripod caisson foundations in silty clay subjected to eccentric lateral loads

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 3,   Pages 467-476 doi: 10.1007/s11709-023-0933-6

Abstract: In this study, model tests were conducted to investigate the bearing capacities of tripod caisson foundations

Keywords： tripod caisson foundation     silty clay     eccentric lateral capacity     model tests    

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Investigation of effects of Cocamide Diethanolamide chemical on physical and rheological properties of bituminous binder

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 1,   Pages 99-116 doi: 10.1007/s11709-021-0799-4

Abstract: modification parameters and chemical additive on modified samples were investigated with conventional bitumen tests(softening point, penetration, ductility) and Superpave tests (rotational viscometer, rolling thin film

Keywords： Cocamide Diethanolamide     bitumen modification     rheology     Superpave tests    

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ROUTE DEVELOPMENT, ANTIVIRAL STUDIES, FIELD EVALUATION AND TOXICITY OF AN ANTIVIRAL PLANT PROTECTANT NK0238

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 1, doi: 10.15302/J-FASE- 2021390

Abstract: further assessment of its antivirus activity in the greenhouse and field experiments, and toxicity testsThe toxicity tests showed that NK0238 was not acutely toxic to birds, fish, honey bees and silkworms.

Keywords： protectant / antiviral in the greenhouse / field evaluation / l-trp-NCA / synthesis optimization / toxicity tests    

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Title Author Date Type Operation

Nonlinear experimental response of non-conventional composite steel and concrete connection

Tobia ZORDAN, Bruno BRISEGHELLA

Journal Article

Investigation of the interior RC beam-column joints under monotonic antisymmetrical load

Fei GAO, Zhiqiang TANG, Biao HU, Junbo CHEN, Hongping ZHU, Jian MA

Journal Article

Study of base friction simulation tests based on a complicated engineered bridge slope

Liu HE, Guang WU, Hua WANG

Journal Article

Strain localization analyses of idealized sands in biaxial tests by distinct element method

Mingjing JIANG, Hehua ZHU, Xiumei LI,

Journal Article

Extension of pilot tests of cyanide elimination by ozone from blast furnace gas washing water through

Ismael Matino, Valentina Colla, Teresa A. Branca

Journal Article

Research on New Technology for Sandy Slope Safety Protection

Niu Xiaodi,Yang Guangqing and Liu Weichao

Journal Article

Semi-industrial Tests of Pressure Leaching on High-iron Sphalerite Concentrate

Wang Jikun,Zhou Tingxi,Wu Jinmei

Journal Article

Seismic tests of post-tensioned self-centering building frames with column and slab restraints

Chung-Che CHOU, Jun-Hen CHEN

Journal Article

enhancement for implementation in purification of modal frequency for extremely noisy ambient vibration tests

Hassan YOUSEFI, Alireza TAGHAVI KANI, Iradj MAHMOUDZADEH KANI, Soheil MOHAMMADI

Journal Article

Axial compression tests and numerical simulation of steel reinforced recycled concrete short columns

Hui MA; Fangda LIU; Yanan WU; Xin A; Yanli ZHAO

Journal Article

Pandemic Woes: Antigen Tests to the Rescue?

Peter Weiss

Journal Article

Analysis of factors affecting passengers ’ mountain sickness basedon nonparamertric tests

Chang Haijuan,Liu Meng,Pang Liping,Yang Peng,Wang Jun

Journal Article

Model testing of tripod caisson foundations in silty clay subjected to eccentric lateral loads

Journal Article

Investigation of effects of Cocamide Diethanolamide chemical on physical and rheological properties of bituminous binder

Journal Article

ROUTE DEVELOPMENT, ANTIVIRAL STUDIES, FIELD EVALUATION AND TOXICITY OF AN ANTIVIRAL PLANT PROTECTANT NK0238

Journal Article