Seismic Behavior Study on Improving Beam-Column Connections in Portal Frames

Abstract:

The beam-column joints of steel solid-web portal frame has high stress concentration, which cause brittle fracture of plate under reciprocating load. Low reciprocating load test and finite element analysis for three kinds of joints, Discussing the ultimate bearing capacity, hysteretic performance and fracture mechanic properties, Which the results shows that: the bearing capacity of improved joint has grater increased than the joint with endplate keep upright; when load to limit state, the flange plate of joint with endplate keep upright has strong fracture performance, this point has been proved during the experiments; According to the numerical distribution of cracks factor, can qualitative identify dangerous position of component, as a basis of fracture fortification for structure.

• Periodical: Advanced Materials Research (Volumes 368-373)
• Pages: 881-884
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.368-373.881
• Online since: October 2011
• Authors: Yun Peng Chu, Yong Yao, De Bin Li
• Keywords: Beam-Column Concentration, Experimental Research, Finite Element Model (FEM), Fracture

References

[1] Xu Yong, Chen Yiyi, Cheng Xin, etal. Light steel portal frame Experimental study on seismic [J]. Journal of Building Structures, 2010, 31 (10) :76-82. (in Chinese)

[2] Wang Yan，Zhang H Y and Li H J. Experiment research on semi-rigid steel beam-to-column joints under cyclic loading [J]. Proceeding of Sixth Pacific Structural Steel Conference , Beijing, 2001, 2(1): 800-807. (in Chinese)

[3] Wang Wan Zhen, structural steel crack criterion and fracture analysis test [J]. Engineering mechanics, 2008, 25 (5) : 27-31. (in Chinese)