Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Cyclic performance and design recommendations of a novel weak-axis reduced beam section connection

  • Lu, Linfeng (School of civil engineering, Chang'an University) ;
  • Xu, Yinglu (School of civil engineering, Chang'an University) ;
  • Liu, Jie (School of civil engineering, Chang'an University) ;
  • Lim, James B.P. (Department of Civil and Environmental Engineering, University of Auckland (City Campus))
  • Received : 2017.12.09
  • Accepted : 2018.03.15
  • Published : 2018.05.10
⟨ Previous Next ⟩

Abstract

In previous weak-axis moment connection tests, brittle fracture always initiated near the edge of the beam flange groove weld due to force flow towards the stiffer column flanges, which is the opposite pattern as strong-axis moment connections. As part of the China NSFC (51278061) study, this paper tested two full-scale novel weak-axis reduced beam section moment connections, including one exterior frame connection specimen SJ-1 under beam end monotonic loading and one interior frame joint specimen SJ-2 under column top cyclic loading. Test results showed that these two specimens were able to satisfy the demands of FEMA-267 (1995) or ANSI/AISC 341-10 (2010) without experiencing brittle fracture. A parametric analysis using the finite element software ABAQUS was carried out to better understand the cyclic performance of the novel weak-axis reduced beam section moment connections, and the influence of the distance between skin plate and reduced beam section, a, the length of the reduced beam section, b, and the cutting depth of the reduced beam section, c, on the cyclic performance was analyzed. It was found that increasing three parametric values reasonably is beneficial to forming beam plastic hinges, and increasing the parameter a is conducive to reducing stress concentration of beam flange groove welds while increasing the parameters b and c can only reduce the peak stress of beam flange groove welds. The rules recommended by FEMA350 (2000) are suitable for designing the proposed weak-axis RBS moment connection, and a proven calculation formulation is given to determine the thickness of skin plate, the key components in the proposed weak-axis connections. Based on the experimental and numerical results, a design procedure for the proposed weak-axis RBS moment connections was developed.

Keywords

Acknowledgement

Supported by : Nature Science Foundation of China (NSFC), Chang'an University

References

  1. ANSI/AISC 341-10 (2010), Seismic Provisions for structural steel buildings. AISC; Chicago, IL, USA.
  2. Chen, S.J., Yeh, C.H. and Chu, J.M. (1996), "Ductile steel beamto-column connections for seismic resistance", J. Struct. Eng., 122(11), 1292-1299. https://doi.org/10.1061/(ASCE)0733-9445(1996)122:11(1292)
  3. Crisan, A. and Dubina, D. (2016), "Bending-shear interaction in short coupling steel beams with reduced beam section", J. Constr. Steel Res., 122, 190-197. https://doi.org/10.1016/j.jcsr.2016.03.020
  4. Driscoll, G.C. and Beddle, L.S. (1982), "Suggestions for avoiding beam-to-column web connection failure", Eng. J., 19, 16-19.
  5. FEMA-267 (1995), Interim Guidelines: Evaluation, Repair, Modification and Design of Steel Moment Frames, Report No. SAC-95-02; Washington, D.C., USA.
  6. FEMA-350 (2000), Recommended Seismic Design Criteria for New Steel Moment-Frame Buildings, Prepared for SAC Joint Venture Partnership by Guidelines Development Committee, Washington, D.C., USA
  7. FEMA-355D (2000), State of the Art Report on Connection Performance, prepared by the SAC Joint Venture for the Federal Emergency Management Agency, Washington, WA, USA. GB 50011-2010(2010), Code for Seismic Design of Buildings, China Architecture & Building Press; Beijing, P.R. China.
  8. Gilton, C.S. and Uang, C.M. (2002), "Cyclic Response and Design Recommendations of Weak-Axis Reduced Beam Section Moment Connections", J. Struct. Eng., 128(4), 452-463. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:4(452)
  9. Lee, C.H., Jung, J.H. and Kim, S.Y. (2015), "Cyclic Seismic Performance of RBS Weak-Axis Welded Moment Connections", J. Korean Soc. Steel Constr., 27(6), 513-523. https://doi.org/10.7781/kjoss.2015.27.6.513
  10. Lignos, D., Kolios, D. and Miranda, E. (2010), "Fragility Assessment of Reduced Beam Section Moment Connections", J. Struct. Eng., 136(9), 1140-1150. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000214
  11. Lu, L.F., Xu, Y.L., Zhou, T.H. and Zheng H. (2016), "Experimental research on box strengthened joint connection for weak-axis of I-section column H-shaped beam under monotonic loading", J. Build. Struct., 37(2), 73-80.
  12. Lu, L.F., Xu, Y.L. and Zheng, H. (2017), "Investigation of composite action on seismic performance of weak-axis column bending connections", J. Constr. Steel Res., 129, 286-300. https://doi.org/10.1016/j.jcsr.2016.11.019
  13. Lu, L.F., Xu, Y.L. and Lim, J.B.P. (2018), "Mechanical performance of a new I-section weak-axis column bending connection", Steel Compos. Struct., Int. J., 26(1), 31-44.
  14. Oh, K., Lee, K., Chen, L., Hong, S.B. and Yang, Y. (2015), "Seismic performance evaluation of weak axis column-tree moment connections with reduced beam section", J. Constr. Steel Res., 105, 28-38. https://doi.org/10.1016/j.jcsr.2014.10.005
  15. Rezaifar, O. and Younesi, A. (2016), "Finite element study the seismic behavior of connection to replace the continuity plates in (NFT/CFT) steel columns", Steel Compos. Struct., Int. J., 21(1), 73-91. https://doi.org/10.12989/scs.2016.21.1.073
  16. Uniform Building Code (1994), International Conference of Building Officials, Whittier, CA, USA
  17. Xu, Y.L., Lu, L.F. and Ma, P.B. (2016), "Finite element analysis on the hysteretic behavior of box strengthen-joint region connection between minor-axis I-shaped column and strengthen-weaken beam", Progress in Steel Building Structures, 18(2), 17-25.
  18. Zahrai, S.M., Mirghaderi, S.R. and Saleh, A. (2017a), "Increasing plastic hinge length using two pipes in a proposed web reduced beam section, an experimental and numerical study", Steel Compos. Struct., Int. J., 23(4), 421-433. https://doi.org/10.12989/scs.2017.23.4.421
  19. Zahrai, S.M., Mirghaderi, S.R. and Saleh, A. (2017b), "Tubular Web Reduced Beam Section (TW-RBS) connection, a numerical and experimental study and result comparison", Steel Compos. Struct., Int. J., 23(5), 571-583. https://doi.org/10.12989/scs.2017.23.5.571
  20. Zhou, T.H. and Zheng, H. (2016), "Experimental research on box strengthened joint connection for weak axis of I-section column-H-shaped beam under monotonic loading", J. Build. Struct., 37(2), 73-80.

Cited by

  1. Development and testing of cored moment resisting stub column dampers vol.34, pp.1, 2018, https://doi.org/10.12989/scs.2020.34.1.107
  2. Experimental and numerical evaluation of rigid connection with reduced depth section vol.34, pp.6, 2018, https://doi.org/10.12989/scs.2020.34.6.863