Spelling suggestions: "subject:"steel pipe"" "subject:"ateel pipe""
11 |
Experimental and numerical investigation of a deeply buried corrugated steel multi plate pipeMoreland, Andrew January 2004 (has links)
No description available.
|
12 |
Grundförstärkning med pålar i berg : I befintlig konstruktion med begränsat utrymmeHöglund, Madicken, Larsson, Marcus January 2020 (has links)
This study has been done in order to examine which type of pile, pile driving- and waterproofing methodsare most suited for an existing building. A building that will undergo an extensive reinforcement of itsfoundation.The study has been made in regard to the following conditions:● Different types of clay soil (Cohesion soil)● Underlying rock structure with heavy incline (8° slope)● Sensitive environment for vibrations and ground displacements● Limited accessibility (Room and maximum weight)● Compressive and tensile forces● Pool (Water environment)To answer the questions of statement a scientific literature study, interview with a foundation expert,calculations in sizing, but also time and cost analysis has been conducted. A site visit to an object ofreference, Nya Krav Himmerfjärdsverket, occurred where a reconstruction of an existing building withextensive work of reinforcement to its’ foundation was in progress.The steel pipe pile with anchor and steel core pile are the best pile types in such conditions as compressiveand tensile forces, clay soil with underlying inclined rock bed, limited accessibility and sensitivesurrounding environment. Which pile type, pile driving- and waterproofing methods that are most suited forsuch conditions is different for each project. The steel core pile is more suitable for higher loads, rockstructures in incline and when verification of load capacity is not needed. At the same time the steel pipepile is more suited when the underlying rock bed is far below ground level, where you would need manypile elements and joints. In addition, the steel pipe pile is suitable for buildings with a complex loaddistribution, where a greater number of piles with lower load capacities is needed in order to satisfy this.The best pile driving method for drilling in sensitive environment is the water equipped down-the-hole(DTH) drill. This drilling method is gentle to surrounding piles in existing building.In order to minimise the risk of water penetration and then expand the life span of the construction, use ofa combination of different waterproofing systems is to prefer when waterproofing pile heads or pilefoundations.
|
13 |
BEHAVIOUR OF DETERIORATED PIPES REHABILITATED WITH GROUTED SLIPLINERSSimpson, Bryan 29 November 2013 (has links)
The goals of this research are to develop and validate the use of distributed fibre optic sensors for use in strain monitoring of buried culverts, and to use full-scale experiments to evaluate the performance of both deteriorated steel and reinforced concrete culverts rehabilitated with grouted slipliners subjected to surface loading. Bench scale experiments were conducted to evaluate the use of fibre optic sensors against conventional strain sensors. Then, fibre optic sensors were attached to a full-scale culvert that was tested in a buried state as a proof of concept. Finally, fibre optic sensors were used in two large scale buried pipe tests to explore the performance of rehabilitated flexible and rigid culverts. A deteriorated steel culvert was tested in a buried state under surface loading, then rehabilitated with a grouted high density polyethylene (HDPE) slipliner while still in a buried state and tested under surface loading at 0.9 m and 0.6 m burial depths. The rehabilitated steel pipe was tested under service loading, and up to 1250 kN of applied load. The results suggested that the grouted annulus stiffened the overall structure, and increased the capacity of the system to over 3 times the fully factored design load. A deteriorated reinforced concrete culvert was tested and rehabilitated in a similar fashion. The grout in the annulus penetrated the cracks at the crown, invert and joint of the concrete pipeline. The lined concrete pipe was tested to 1200 kN under single axle loading, and to 800 kN under single wheel loading. The results suggested that while the concrete pipe was stiffened by the grout, it remained the primary contributor to structural capacity, with the liner contributing little to the capacity. Repair reduced the diameter change by an average of 90%, with the capacity reaching approximately 3.3 and 4.2 times the design loads for single axle and single wheel pair loading, respectively. The maximum response was under single axle loading over the barrels of the concrete pipe. In no instance did the structures reach an ultimate limit state, and the tests were stopped after bearing failure of the soil occurred. / Thesis (Master, Civil Engineering) -- Queen's University, 2013-11-28 17:24:50.815
|
14 |
腐食鋼板の力学特性評価のための板厚計測および有効板厚に関する考察杉浦, 邦征, Sugiura, Kunitomo, 田村, 功, Tamura, Isao, 渡邊, 英一, Watanabe, Eiichi, 伊藤, 義人, Itoh, Yoshito, 藤井, 堅, Fujii, Katashi, 野上, 邦栄, Nogami, Kuniei, 永田, 和寿, Nagata, Kazutoshi, 岡, 扶樹, Oka, Tomoki 03 1900 (has links)
No description available.
|
15 |
海洋環境において腐食した鋼管の形状計測と残存耐力に関する検討田村, 功, Tamura, Isao, 渡邊, 英一, Watanabe, Eiichi, 伊藤, 義人, Itoh, Yoshito, 藤井, 堅, Fujii, katashi, 野上, 邦栄, Nogami, Kuniei, 杉浦, 邦征, Sugiura, kunitomo, 永田, 和寿, Nagata, kazutoshi, 岡, 扶樹, Oka, Tomoki 03 1900 (has links)
No description available.
|
16 |
軸方向荷重を受ける溶接添接補修された腐食劣化鋼管杭の性能評価ITOH, Yoshito, CHEN, Xiao, 伊藤, 義人, 陳, 嘯 09 1900 (has links)
No description available.
|
17 |
一般構造用鋼管へのあて板湿式水中溶接補修の継手挙動のモデル化Itoh, Yoshito, Kitane, Yasuo, Watanabe, Naohiko, 伊藤, 義人, 北根, 安雄, 渡邉, 尚彦 01 August 2009 (has links)
No description available.
|
18 |
水中溶接鋼板添接補修された断面欠損鋼管の耐荷力実験Matsuoka, Kazumi, Watanabe, Naohiko, Itoh, Yoshito, Kitane, Yasuo, 松岡, 和巳, 渡邊, 尚彦, 伊藤, 義人, 北根, 安雄 01 August 2009 (has links)
No description available.
|
19 |
添接板補修された断面欠損鋼管の繰返し曲げ挙動に関する研究ITOH, Yoshito, WATANABE, Naohiko, KITANE, Yasuo, FURUNISHI, Kazuo, 伊藤, 義人, 渡邊, 尚彦, 北根, 安雄, 古西, 和夫 27 December 2011 (has links)
No description available.
|
20 |
Análise da resistência à fadiga de tubos de aço API 5CT N80 Tipo Q soldados via processo de indução magnética de alta frequência (HFIW) / Fatigue analysis of API 5CT N80 Q Steel Pipes manufactured by High Frequency Induction Welding (HFIW)Sorrija, Bruno Antonio [UNESP] 13 April 2016 (has links)
Submitted by BRUNO ANTONIO SORRIJA null (sorrija.bruno@gmail.com) on 2016-05-19T13:40:17Z
No. of bitstreams: 1
Versão Final - Dissertação.pdf: 9391340 bytes, checksum: b297f42192c63f4f572fd0e0e177f47e (MD5) / Approved for entry into archive by Felipe Augusto Arakaki (arakaki@reitoria.unesp.br) on 2016-05-23T16:33:37Z (GMT) No. of bitstreams: 1
sorrija_ba_me_guara.pdf: 9391340 bytes, checksum: b297f42192c63f4f572fd0e0e177f47e (MD5) / Made available in DSpace on 2016-05-23T16:33:37Z (GMT). No. of bitstreams: 1
sorrija_ba_me_guara.pdf: 9391340 bytes, checksum: b297f42192c63f4f572fd0e0e177f47e (MD5)
Previous issue date: 2016-04-13 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Tubos de aço utilizados na exploração e prospecção de petróleo e gás natural estão
sujeitos a carregamentos dinâmicos durante o transporte (transit fatigue) e também
quando em serviço. Por este motivo é imperativo que os tubos utilizados apresentem
excelente integridade estrutural a fim de evitar a ocorrência de falhas prematuras devido
à fadiga. Contudo, como o processo de fabricação HFIW, largamente utilizado pela
indústria, envolve conformação mecânica seguida de soldagem, defeitos estarão
inerentemente presentes nos tubos, notadamente uma interface entre as bordas das chapas
soldadas. No presente trabalho foi investigado como a junta soldada de tubos de aço API
5CT N80 tipo Q pode contribuir para redução da vida em fadiga e como o processo como
um todo pode levar a anisotropia mecânica dos tubos. Para preservar ao máximo as
características originais dos tubos foram realizados ensaios de fadiga axiais utilizando
corpos de prova não previstos pelas normas técnicas vigentes, com espessuras iguais as
das paredes dos tubos dos quais foram retirados. Foi também desenvolvido e testado um
dispositivo para realização de ensaios de fadiga utilizando trechos de tubo, o qual mostrou
potencial para a realização de ensaios futuros. Os resultados dos ensaios axiais (realizados
de modo a comparar a região da junta soldada como uma posição a 90° dela) indicaram
que a junta soldada pode agir como um tipo de concentrador de tensões, contribuindo
para a diminuição da resistência à fadiga dos tubos de maneira inversamente proporcional
à carga aplicada. Também foi observado que defeitos resultantes do processo de
fabricação (muitos deles macroscópicos) podem atuar como pontos para a nucleação de
trincas de fadiga e que, portanto, não deveriam estar presentes no produto final. Ensaios
de tração, análises metalográfias, fractográficas e de microdureza também foram
realizados de modo a complementar os resultados dos ensaios de fadiga. / Steel pipes, used in the oil and gas industry in prospection and exploration activities, are often subjected to cyclic loading during their transportation (transit fatigue) and during their service life. Considering this, these steel pipes must have excellent structural integrity in order to avoid premature failure by fatigue mechanisms. However, the HFIW manufacturing process, widely used by the industry, involves mechanical forming and welding and, therefore, defects are inherently present in the finished products, remarkably an interface between the edges of the steel sheets that are welded into tubes. In this work it has been investigated how the HFIW manufacturing process can reduce the fatigue resistance of API 5CT N80 type Q steel tubes and lead to a mechanical anisotropy of the finished product. To keep the specimens characteristics closer to the real steel pipes, axial fatigue tests have been performed with round specimens which had their thickness equal to the thickness of the walls of the pipes from which they had been taken from. It has been developed also a device and a method to test small length sections of steel tubes, which have shown potential to be used in the future as a new methodology for the study of fatigue in steel pipes. The results of the axial fatigue tests (carried out to compare the welded joint to a position situated 90° from it) indicate that the welded joint can act as a stress raiser and contributes to reduce the fatigue resistance of the steel pipes, in a inversely proportional relationship with the increasing of the applied dynamic loading. It has been observed also that some defects, which result from the manufacturing process, can act as points for the nucleation of fatigue cracks and, for this, they should not be present in the manufactured product. Tensile tests, metallographic analysis, fractography study and microhardness tests had been carried out to complement the fatigue tests results.
|
Page generated in 0.0458 seconds