Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 26, No. 10 (October 2013) 1119-1134   

downloaded Downloaded: 284   viewed Viewed: 2263

  NON-LINEAR BEHAVIOR OF NEW (FSFN) MOMENT RESISTING CONNECTIONS IN COMPARISON TO THE EXISTING KBB CONNECTIONS IN STEEL FRAMES
 
F. Shahidi, F. Nateghi-Alahi and F. Shahidi
 
( Received: January 22, 2013 – Accepted in Revised Form: May 16, 2013 )
 
 

Abstract    After Northridge (1994) and Kobe (1995) earthquakes, several studies have been conducted to improve the seismic performance of steel structures. In this investigation, new steel moment-resisting connections (FSFN) developed by the authors, were studied by the non-linear numerical analysis. These connections were single-sided beam-to-column assemblies that are representative of exterior beam-to-column connections. Seismic performance of FSFN connections in comparison to the W-series of existing KBB connections under standard and near fault load history based on AISC 341 and FEMA 355D were also studied. For this purpose, 32 analytical modeled specimens were evaluated and the results were compared. Results showed that FSFN bracket connection has a seismic performance similar to KBB connection and it is an appropriate connection for the special moment resisting frames both in far and near fault zones. More so, these connections do not have patent and due to their dimensions which are smaller than the Kaiser brackets, they can supported deeper beams up to 100 cm. Therefore, it can be considered as an appropriate alternative for the Kaiser patented connections. This paper is to present the analytical modeling, non-linear behavior and the results of the comparison studies in detail including obtained conclusions.

 

Keywords    FSFN brackets, Non-linear numerical analysis, Standard load history, Near-Fault load history, and KBB brackets.

 

چکیده    [if gte mso 9]>

پس از زلزله 1994 نورثریج و 1995 کوبه ژاپن، مطالعات زیادی در خصوص بهبود عملکرد لرزه ای سازه ها صورت گرفت. در این بررسی رفتار اتصال گیردار جدید FSFN توسعه یافته توسط نویسنده های این مقاله، با استفاده از روش اجزاء محدود غیر خطی مورد ارزیابی قرار گرفت. این اتصال به صورت یک طرفه و به عنوان یک تیر خارجی بررسی گردید. همچنین ارزیابی عملکرد لرزه ای اتصال FSFN در مقایسه با اتصال کایزر و تحت بارگذاری چرخه ای استاندارد و نزدیک گسل بر اساس آیین نامه های AISC 341 و FEMA 355D انجام شد. بدین منظور 32 نمونه عددی مورد ارزیابی قرار گرفت، نتایج نشان داد که اتصال براکت FSFN رفتار لرزه ای مشابه با اتصال کایزر دارد و آن اتصالی مناسب برای قاب خمشی ویژه در هردو منطقه دور و نزدیک گسل می باشد. این براکت در تیرهای عمیق دارای ابعادی کوچکتر نسبت براکت کایزر می باشد و قادر به پشتیبانی از تیرهای عمیق تری تا عمق مقطع cm­100، نسبت به اتصال کایزر می باشد. بنابراین آن می تواند اتصالی مناسب و جایگزین اتصال انحصاری کایزر باشد. این مقاله به ارائه مدل تحلیلی، رفتار غیر خطی و مطالعه مقایسه ای، در جزئیات نتایج بدست آمده می پردازد

References   

 

1.     Bertero, V. V., Anderson, J. C. and Krawinkler, H., "Performance of steel building structures during the northridge earthquake", Earthquake Engineering Research Center, University of California,  (1994).

2.     Kuwamura, H., "Fracture of steel during an earthquake—state-of-the-art in japan", Engineering Structures,  Vol. 20, No. 4, (1998), 310-322.

3.     Bursi, O. S., Ferrario, F. and Fontanari, V., "Non-linear analysis of the low-cycle fracture behaviour of isolated tee stub connections", Computers & Structures,  Vol. 80, No. 27, (2002), 2333-2360.

4.     Tsai, K.-C. and Popov, E. P., "Cyclic behavior of end-plate moment connections", Journal of Structural Engineering,  Vol. 116, No. 11, (1990), 2917-2930.

5.     H., S., Ductile end-plate connections utilizing plate yielding, in School of Civil Engineering and Environmental Science., University of Oklahoma: Norman. Oklahoma. (1997)

6.     Swanson, J. A., Kokan, D. S. and Leon, R. T., "Advanced finite element modeling of bolted t-stub connection components", Journal of Constructional Steel Research,  Vol. 58, No. 5, (2002), 1015-1031.

7.     Popov, E. P. and Takhirov, S. M., "Bolted large seismic steel beam-to-column connections part 1: Experimental study", Engineering Structures,  Vol. 24, No. 12, (2002), 1523-1534.

8.     Takhirov, S. and Popov, E. P., "Bolted large seismic steel beam-to-column connections part 2: Numerical nonlinear analysis", Engineering Structures,  Vol. 24, No. 12, (2002), 1535-1545.

9.     Gerami, M., Saberi, H., Saberi, V. and Saedi Daryan, A., "Cyclic behavior of bolted connections with different arrangement of bolts", Journal of Constructional Steel Research,  Vol. 67, No. 4, (2011), 690-705.

10.   Kasai, K., Hodgson, I. and Bleiman, D., "Rigid-bolted repair method for damaged moment connections", Engineering Structures,  Vol. 20, No. 4, (1998), 521-532.

11.   Blaney, C., Uang, C.-M., Kim, D.-W., Sim, H.-B. and Adan, S. M., "Cyclic testing and analysis of retrofitted pre-northridge steel moment connections using bolted brackets", SEAOC 2010 Convention Proceedings, (2010).

12.   Adan, S. M. and Gibb, W., "Experimental evaluation of kaiser bolted bracket steel moment-resisting connections", Engineering journal,  Vol. 46, No. 3, (2009), 181-194.

13.   Shahidi, F., Nateghi-A, F. and Razzaghi, M., "Influential factor in improving the seismic performance of the kaiser bolted bracket moment connection", International Journal of Engineering-Transactions B: Applications,  Vol. 26, No. 2, (2012), 163-170

14.   Hibbitt, D., Karlsson, B. and Sorensen, P., "Abaqus/standard user’s manual, version 6. 7, abaqus", Inc., Pawtucket, RI,  (2007).

15.   LRFD, A., "Manual of steel construction, load and resistance factor design" Chicago: American Institute of Steel Construction. (1994)

16.   Adan, S. M., "Test report 98-05-specimen hh-08", ICF Kaiser Engineers,  (1998).

17.   Construction, A. I. o. S., "Seismic provisions for structural steel buildings", American Institute of Steel Construction,  (2002).

18.   Roeder, C. W. and Venture, S. J., "State of the art report on connection performance", SAC Joint Venture,  (2000).

19.   Venture, S. J., "Protocol for fabrication, inspection, testing, and documentation of beam-column connection tests and other experimental specimens", Rep. No. SAC/BD-97,  Vol. 2, (1997).

20.   Krawinkler, H., Gupta, A., Medina, R. and Luco, N., "Development of loading histories for testing of steel beam-to-column assemblies", Stanford University,  (2000).

21.   RCSC, "Specification for structural joints using high-strength bolts", Research Council on Structural Connections., (2009).

22.   Cao, W.-G., Zhai, Y.-C., Wang, J.-Y. and Zhang, Y.-J., "Specification for structural steel buildings", Zhongguo Gonglu Xuebao(China Journal of Highway and Transport),  Vol. 25, No. 2, (2012), 90-99.

23.           ANSI, A., "Aisc 358–05  prequalified connections for special and intermediate steel moment frames for seismic applications", American Institute of Steel Construction Inc., Chicago, (2005).





International Journal of Engineering
E-mail: office@ije.ir
Web Site: http://www.ije.ir