| کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
|---|---|---|---|---|
| 4912591 | 1428748 | 2018 | 9 صفحه PDF | دانلود رایگان |
کلمات کلیدی
1.مقدمه
شکل 1. جزئیات اتصال
شکل 2. آرماتوربندی
جدول 1.جزئیات نمونه‌ها
شکل 3. ابعاد و ساختار نمونه‌ها (ابعاد: میلی‌متر)
جدول 2.خواص مکانیکی فولاد
شکل 4. تنظیمات آزمایش
شکل 5. آسیب داخلی ناحیه هسته اتصال
2. برنامه آزمایشی
2.1 طراحی نمونه
2.2 خواص ماده
3. تجهیزات آزمایش
4. نتایج آزمایش
4.1 نقص قطعه
شکل 6. حالت‌های نقص نهایی نمونه‌ها
4.2منحنی هیسترزیس
جدول 5.مقایسه مقدار تجربی و مقدار محاسبه‌شده تئوری
شکل 9. دیاگرام محاسبه ظرفیت خمشی بخش مثبت
شکل 7. نمدار هیسترزیس نمونه‌ها
جدول 3.محاسبه سختی دورانی
جدول 4.ضریب نرمی و ضریب میرایی ویسکوز معادل
شکل 8. نمودار اسکلت سازه نمونه
4.3 نمودار اسکلت سازه نمونه
4.4 ظرفیت اتلاف انرژی و نرمی
5. ظرفیت خمشی تیر بتنی تقویت‌شده خم نشده
6. نتیجه‌گیری
- A new-type of fabricated beam-column connections is presented in this paper.
- To investigate the seismic behavior of the precast connection, seven specimens are tested by pseudo-static test.
- The test results indicate that the hysteresis curves of precast connection are plump, and all specimens failed in bending with a beam plastic hinge.
- So the fabricated connection exhibits satisfactory ductility and energy dissipation capacity.
- Besides, the flexural capacity of unbonded prestressed confined concrete beam is analyzed.
- And based on the theory of concentrated plastic zone, the formula of flexural bearing capacity is proposed.
- The theoretical results agree well with the test data, which can provide reference for research.
At present, the building industrialization has become the development direction of construction industry, the precast prefabricated buildings become the focus of the construction industry once again because of its unique characteristics. A new-type of fabricated beam-column connections with end-plates is presented and introduced on this background. To investigate the seismic behavior of the new-type precast connection, seven specimens are tested by pseudo-static test. The hysteresis curves are recorded during the test, and the seismic indicators, such as ductility and energy dissipation capacity, are determined. The test results indicate that the hysteresis curves of precast connection are plump, and all specimens failed in bending in a malleable way with a beam plastic hinge, which is fully consistent with the criterion of strong column weak beams. Additionally, the fabricated connection exhibits satisfactory ductility and energy dissipation capacity, showing better seismic performance. Besides, the flexural capacity of unbonded prestressed confined concrete beam is analyzed, and the formula of flexural bearing capacity is proposed based on the theory of concentrated plastic zone. The theoretical results agree well with the experimental data, which can provide reference for theoretical research.
Journal: Construction and Building Materials - Volume 158, 15 January 2018, Pages 208-216