Cyclic behaviour of unreinforced and rib-reinforced moment connections

Chen, Cheng-Chih; Chen, Shuan Wei; Chung, Ming Dar; Lin, Ming Chih

doi:10.1016/j.jcsr.2004.06.005

Cited by 52 publications

(32 citation statements)

References 13 publications

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“…In order to develop a better understanding of the cyclic behaviour of typical steel moment resisting connections, three WUF, RBS and DF test specimens are considered from previous experimental studies [21][22][23][24] as shown in Fig 1. The detailed properties of the selected test specimens are presented in Table 1. [24], and (c) DF connection [21,22] d1, d2, d3 are hole diameters in the DF connection (see Fig 1-c) d/e/f are electrode type, bevel angle (degree) and weld root diameter (mm), respectively.…”

Section: Reference Experimental Testsmentioning

confidence: 99%

“…FE models were generated using non-uniform meshes with local refinement in the regions with high stress concentration and holes. Bolts and shear tabs were not modelled in the FE model of the WUF and RBS test specimens, since no slippage was observed between the shear tab and the beam web in these connections [23][24]. The VonMises yielding criterion and multi-linear kinematic hardening plastic model [27] were used to model the plasticity and cyclic inelastic behaviour of steel material, respectively.…”

Section: Finite Element Modelling Approachmentioning

confidence: 99%

See 1 more Smart Citation

Optimum drilled flange moment resisting connections for seismic regions

Atashzaban

Hajirasouliha

Jazany

et al. 2015

Journal of Constructional Steel Research

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Section: Reference Experimental Testsmentioning

confidence: 99%

Section: Finite Element Modelling Approachmentioning

confidence: 99%

Optimum drilled flange moment resisting connections for seismic regions

Atashzaban

Hajirasouliha

Jazany

et al. 2015

Journal of Constructional Steel Research

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“…Since their fully commercial use in the early 1940s, spirals have proved to be a cost-effective and efficient method for concentrating a variety of ores [16,17]. In recent years, fine mineral spiral separators have been successfully used for processing ever-finer materials [18][19][20]. Due to the low settling velocities of very fine mineral particles, smaller bed depths and laminar flows are required for efficient separation [18].…”

Section: Introductionmentioning

confidence: 99%

Beneficiation of a Sedimentary Phosphate Ore by a Combination of Spiral Gravity and Direct-Reverse Flotation

et al. 2016

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Abstract:In China, direct-reverse flotation is proved to be applicable to most phosphate ores. However, because the ratio of froth product is generally high, current direct-reverse technology faces challenges in terms of high reagent consumptions and cost. A new gravity and flotation combined process has been developed for the recovery of collophanite from sedimentary phosphate ore from the beneficiation plant of Hubei, China. In this process, 53% of the collophanite was firstly recovered by gravity separation, reducing the mass flow to direct flotation. The gravity tailing was the feed for the direct flotation. The flotation concentrate, mixed with gravity concentrate, was then subjected to reverse flotation. A final concentrate with a grade of 30.41% P 2 O 5 at a recovery of 91.5% was produced from the feed analyzing 21.55% P 2 O 5 . Compared to the conventional direct-reverse flotation 86.1% recovery at 31.69% P 2 O 5 , it was found that pre-recovery of collophanite by spiral separation could significantly reduce the flotation reagent consumption and lead to improved overall collophanite recovery. The benefits of the new process in terms of cost savings were also discussed.

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“…The results indicated that plastic rotations developed by the beams prior to connection failure were poor when all connections failed by fracture at or near the beam flange groove welds. In 2005, Chen and Cheng-Chih et al [5] investigated experimentally and numerically the cyclic behaviour of pre-Northridge connections. The experimental results explicitly revealed the brittle fracture of the beam flange, initiated from the root of the weld access hole.…”

Section: Introductionmentioning

confidence: 99%

Procjena ekstremnog opterećenja u zavarenim spojevima

2014

JCE

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Evaluation of extreme load performance of pre-Northridge connectionsDisastrous consequences of a partial collapse of the Ronan Point apartment in 1968, along with the 1994 Northridge earthquake, exposed the vulnerability of steel moment frames subjected to extreme loading. The reports of these two catastrophic events revealed the significant role of the beam-to-column connection where the damage was mainly formed. A numerical and experimental investigation was conducted in accordance with 2010 AISC Seismic Provisions and UFC 4-023-03 Guideline. An inadequate cyclic behaviour and rotational capacity resulted from the analysis where the fracture in the vicinity of groove welding was due to a poorly designed connection. Procjena ponašanja "Pre-Northridge" priključaka na ekstremna opterećenja Katastrofalne posljedice djelomičnog urušavanja apartmana Ronan Point 1968. i potresa u Northridgeu 1994. razotkrile su osjetljivost čeličnih okvira izloženih ekstremnim opterećenjima. Izvješća ovih dvaju katastrofalnih događaja pokazala su značajnu ulogu priključka nosač-stup gdje su se pretežno događala oštećenja. Numeričko i eksperimentalno istraživanje provedeno je u skladu sa 2010 AISC seizmičkim odredbama i UFC 4-023-03 smjernicama. Nisko ciklično ponašanje i rotacijski kapacitet proizlaze iz analize gdje je lom u blizini sučeonog zavara bio način otkazivanja uzoraka.

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Cyclic behaviour of unreinforced and rib-reinforced moment connections

Cited by 52 publications

References 13 publications

Optimum drilled flange moment resisting connections for seismic regions

Optimum drilled flange moment resisting connections for seismic regions

Beneficiation of a Sedimentary Phosphate Ore by a Combination of Spiral Gravity and Direct-Reverse Flotation

Procjena ekstremnog opterećenja u zavarenim spojevima

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