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Experimental Study of the Behavior of a Semi-rigid Connection under Shear
Abazarsa, Fariba | 2007
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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 37873 (09)
- University: Sharif University of Technology
- Department: Civil Engineering
- Advisor(s): Khonsari, Vahid
- Abstract:
- Recent studies show that the most efficient connections are those which have more flexibility and energy dissipation capacity in addition to their strength and stiffness. While their flexibility reduce the earthquake-induced forces, their energy dissipation capacity, by dissipating some of the energy at connections, can reduce the share of structural members of the total energy that has to be dissipated, hence increasing their chance to remain intact and undamaged during an earthquake. Since conventional connections, even semi-rigid ones, have great shear rigidity, there is not any article in the literature about shear behavior of beam-to-column connections. However, due the fact that the innovative connection, the subject of this study, has large flexibility and energy dissipation capacity in shear, it was necessary to investigate its shear behavior in the laboratory. In this thesis, 4 mild steel samples of this semi-rigid connection were fabricated in two different sizes (2 samples of each size), and were tested under "monotonic" and "cyclic" loading regimes. 'Shear Force'-'Shear Displacement' curves together with their energy dissipation indices produced in monotonic tests, and hysteresis loops obtained in cyclic tests show that this new semi-rigid connection has a large energy dissipation capacity in shear. Hence, it can be applied as a device with dual performance, acting as a semi-rigid connection, and dissipating energy as a hysteretic damper
- Keywords:
- Semirigid Connection ; Shear Behavior ; Monotonic Test ; Cyclic Test ; Energy Dissipation
- محتواي کتاب
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- چکيده
- 1- فصل اول: مقدمه
- 1-1- مقدمه
- 1-2- ساختار پاياننامه
- 2- فصل دوم: طبقهبندي اتصالات و قابها
- 2-1- مقدمه
- 2-2- تعريف گره و اتصال
- 2-3- منحني نمايش رفتار گره
- 2-4- طبقه بندي اتصالات از نظر آئين نامه ها
- 2-5- معيارهاي طبقه بندي اتصالات و تحليل هاي مربوطه
- 2-6- طبقهبندي قابها
- 2-7- تاثير رفتار گره در پاسخ قاب هاي مهاربندي نشده
- 2-8- بررسي اثرات P-∆ در ساختمان هاي فولادي با اتصالات نيمه- صلب
- 2-9- تاثير لقي اوليه اتصالات در منحني هاي M-θ
- 2-10- تاثير لغزش پيچها تحت اثر برش در رفتار خمشي اتصالات
- 3- فصل سوم: سيستمهاي اتلاف انرژي
- 4- فصل چهارم: اتلاف انرژي در انواع مختلف اتصالات تير به ستون
- 4-1- مقدمه
- 4-2- ظرفيت اتلاف انرژي در هر يک از اجزاء يک گره
- 4-2-1- اتلاف انرژي در اتصالات جوشي
- 4-2-2- اتلاف انرژي و پاسخ سيکليک در اتصالات با بال جوش شده و جان پيچي
- 4-2-3- اتلاف انرژي و پاسخ سيکليک در اتصالات با ورقهاي متصل به بالها
- 4-2-4- اتلاف انرژي و پاسخ سيکليک در اتصالات با قطعات سپري
- 4-2-5- اتلاف انرژي و پاسخ سيکليک در اتصالات با صفحه انتهايي
- 4-2-6- اتلاف انرژي در اتصالات با نبشي
- 4-3- مقايسه تجربي رفتار اتصالات جوش شده و اتصالات با پيچ هاي با مقاومت بالا
- 5- فصل پنجم: بررسي تجربي رفتار برشي اتصال مورد مطالعه
- 6- فصل ششم: نتيجهگيري و پيشنهادات
- فهرست مراجع