Evaluation of Holes Fabricated Using Plasma Arc Cutting
| العنوان: | Evaluation of Holes Fabricated Using Plasma Arc Cutting |
|---|---|
| المؤلفون: | Beckett, Christopher |
| تفاصيل مُضافة: | Ocel, Justin, author Professional Service Industries, Inc., researcher. United States. Federal Highway Administration. Office of Infrastructure Research and Development, sponsoring body. Turner-Fairbank Highway Research Center, issuing body. |
| وصف مادي: | 1 online resource [164] pages : illustrations |
| مستخلص: | Modern plasma-cutting equipment and techniques can produce high-quality holes more economically than drilling and punching. However, American Association of State Highway and Transportation Officials (AASHTO) design and construction specifications do not permit the use of plasma-cut holes in primary bridge members due to a lack of experimental data demonstrating their fatigue and tensile strength. Additionally, it is uncertain if holes fabricated using plasma arc cutting meet the AASHTO requirements for hole size accuracy. This research shows that round open holes fabricated using plasma arc cutting would be an AASHTO category E fatigue detail. Bearing connections with nonpretensioned bolts installed in plasma-cut holes would be classified as category E2 Both results represent lower fatigue resistance compared to drilled or punched holes. Most tension members produced a tensile strength equal to or exceeding the theoretical nominal tensile strength. However, several tension members did not attain the theoretical nominal strength and a reduction factor was necessary when calculating the tensile resistance of a member with plasma-cut holes. Tension testing at low temperatures revealed that members with conventional plasma-cut holes can fail with brittle fracture and insignificant inelastic deformation. Lastly, the four fabricators used for this study provided a mostly consistent hole diameter over numerous samples. However, variation in diameter was large enough that close quality control was required 1006 |
| الموضوعات: | Iron and steel bridges., Plasma arc cutting., Bridges Design and construction., Coupage au plasma., Ponts Conception et construction., Bridges Design and construction., Iron and steel bridges., Plasma arc cutting., Fabrication., Fatigue (Mechanics), Holes. |
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| الإتاحة: | Open access content. Open access content |
| ملاحظة: | "August 2020"--Technical report documentation page Includes bibliographical references (pages 147-148) Performed by Professional Service Industries, Inc. Sponsored by the Federal Highway Administration Office of Infrastructure Research and Development under contract number DTFH61-10-D-00017 English |
| أرقام أخرى: | NATTR oai:dot.stacks:dot:51753 1224109488 |
| المصدر المساهم: | From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1224109488 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |