RELIABILITY-BASED ANALYSIS ON THE STRUCTURAL LUMBERS USED FOR CONVENTIONAL CONSTRUCTION I : Specified values of bending strength and relationships between reliability indexes and performance facters at ultimate limit states

The application of concrete filled steel tubes (CFSTs) as composite members has widely been used around the world and is becoming popular day by day for structural application especially in earthquake regions. This paper indicates that an experimental study was conducted to comprehend the behaviour of T-stub end plates connected to concrete filled thin-walled steel tube (CFTST) with different types of bolts and are subjected to pullout load. The bolts used are normal type bolt M20 grade 8.8 and Lindapter Hollo-bolt HB16 and HB20. A series of 10 mm thick T-stub end plates were fastened to 2 mm CFTST of 200 mm x 200 mm in cross-section. All of the specimens were subjected to monotonic pull-out load until failure. Based on test results, the Lidapter Hollo-bolts showed better performance compare to normal bolts. The highest ultimate limit load for T-stub end plate fasten with Lindapter Hollo-bolt is four times higher than with normal bolt although all end plates show similar behaviour and failure mode patterns. It can be concluded that T-stub end plate with Lindapter Hollo-bolt shows a better performance in the service limit and ultimate limit states according to the regulations in the design codes.

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Appendix: Safety format of Eurocode 5 for ultimate limit states

Construction and Building Materials ◽

10.1016/0950-0618(92)90006-k ◽

1992 ◽

Vol 6 (3) ◽

pp. 150-151

Keyword(s):

Limit States ◽

Ultimate Limit

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Microstructure of WC–Co–VN hard-alloy matrix for diamond-bearing details of drilling tools

Azerbaijan Oil Industry ◽

10.37474/0365-8554/2020-3-31-38 ◽

2020 ◽

pp. 31-38

Author(s):

V.A. Mechnik ◽

◽

R.A. Hasanov ◽

V.N. Kolodnitskiy ◽

N.A. Bondarenko ◽

...

Keyword(s):

Hard Alloy ◽

Oil And Gas ◽

Bending Strength ◽

Wear Intensity ◽

Performance Characteristics ◽

Vanadium Nitride ◽

Alloy Matrix ◽

Drilling Tools ◽

Fine Grained Structure ◽

And Performance

The paper presents the research results on the structure and performance characteristics improvement of WC-Co hard-alloy matrix samples formed via the methods of cold and further hot moulding for the diamond-bearing details of drilling tools. It is shown that applying vanadium-nitride in 3 % in the composition of 94WC-6Co source materials provides the increase of sample hardness from 22.8 to 34.2 hPa, the compressive and bending strength from 4800 to 5340 MPa and from 2200 to 2280 MPa correspondingly, as well as the decrease of wear intensity from 1710×10-6 to 5200×10-6 g/m. The effect of formation of fine-grained structure for WC−CoNbN hard-alloy matrix with improved mechanical and performance characteristics revealed in the study points to the necessity of their usage in the development of efficient tools for drilling of oil and gas wells.

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Ultimate limit in size and performance of WSe2 vertical diodes

Nature Communications ◽

10.1038/s41467-018-07820-8 ◽

2018 ◽

Vol 9 (1) ◽

Cited By ~ 13

Author(s):

Ghazanfar Nazir ◽

Hakseong Kim ◽

Jihwan Kim ◽

Kyoung Soo Kim ◽

Dong Hoon Shin ◽

...

Keyword(s):

And Performance ◽

Ultimate Limit

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Preparation and Performance Testing of Tubular Cathode Support for Direct Ethanol Fuel Cell

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.415-417.2345 ◽

2011 ◽

Vol 415-417 ◽

pp. 2345-2348

Author(s):

Yang Zhang ◽

Dong Tang ◽

Rui Xue Duan ◽

Hong Jun Ni

Keyword(s):

Fuel Cell ◽

Bending Strength ◽

Raw Materials ◽

Performance Testing ◽

Volume Resistivity ◽

Ethanol Fuel ◽

Direct Ethanol Fuel Cell ◽

Performance Requirements ◽

And Performance ◽

Gelcasting Process

A new tubular cathode support for Direct Ethanol Fuel Cell (DEFC) was prepared by the gelcasting process using mesocarbon microbead(MCMB) and graphite as the main raw materials. The effects of different graphite doping ratios on tensile strength, bending strength, crushing strength, volume resistivity and shrinkage rate for the prepared tubular cathode support were studied by experimental test. The result showed that the prepared tubular cathode support had very good comprehensive performance. The tubular cathode support with 10% graphite exhibits the best performance such as bending strength 25MPa and resistivity30µΩ•m, and it satisfied the DEFC cathode working conditions and performance requirements.

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Parameter identification as the basis for finite element simulations of ultimate limit states of concrete hinges

Computational Modelling of Concrete Structures ◽

10.1201/9781315182964-82 ◽

2018 ◽

pp. 689-696

Author(s):

J. Kalliauer ◽

T. Schlappal ◽

H.A. Mang ◽

B. Pichler

Keyword(s):

Finite Element ◽

Parameter Identification ◽

Finite Element Simulations ◽

Limit States ◽

Ultimate Limit

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Investigation of horizontal forces result in railway viaduct with curved truck

Budownictwo i Architektura ◽

10.35784/bud-arch.2072 ◽

2013 ◽

Vol 12 (2) ◽

pp. 047-054 ◽

Cited By ~ 2

Author(s):

Piotr Olaszek ◽

Juliusz Cieśla ◽

Waldemar Szaniec

Keyword(s):

Railway Track ◽

Bridge Structure ◽

Dynamic Effects ◽

Passenger Cars ◽

Limit States ◽

Railway Line ◽

Vertical Displacements ◽

Special Train ◽

Ultimate Limit ◽

Crossing Test

In the report some investigations of bridge structure, connected with the adaptation of the railway line to speeds up to 200 km/h for conventional trains and up to 250 km/h for tilting trains were presented. A railway track is the characteristic feature of tested viaduct, because the truck is curved over the whole length of span with radius of R = 2600 m. The tests of the viaduct required the verification of influence of the dynamic effects on the ultimate limit states which corresponded to the safety of structure, as well as the serviceability limit states, related to the safety of driving and the travellers’ comfort. In frames of investigations, a special train comprised of two locomotives and four passenger cars, was used with speeds in the range between 10 and 200 km/h. The report focuses on the problems addressing the influence of horizontal actions in the case of bridge with curved truck. The measurements of the horizontal and vertical displacements as well as the accelerations of span, and the speed of crossing test train were executed. The measured and theoretically calculated chosen courses of displacements and accelerations were introduced. The degree of divergence between measured and calculated values was analysed.

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