Effects of Connection Detail on Structural Behavior of Steel Braced Frames


Abstract eng:
Braced frame structures are used for school gymnasiums and factories with large space. It is very important building which will be used as emergency public shelters in time of disaster. In braced frames, generally the columns are placed along their weak axis for wide-flange steel cross sections and the beam web is connected through gusset plates on the column web by using high strength bolts. These beam-to-column connections are assumed as a pin connection at the stage of seismic design, and seismic performance of the braced frames depends on the strength of the tension-only brace. Connection of these components is constructed by a general design practice, although its detail is very complex. In other words, the effect of various connection details on the seismic performance of the braced frame is unclear at the stage of seismic design. This paper focuses on differences in connection details, and describes their effects on structural behaviors of braced frame structures. The cyclic loading tests of 2 story-1 bay full-scale braced frames with various connections were carried out. The main parameters are: a connection eccentricity of brace, details at beam-end connection and presence of concrete slabs. Connection eccentricity of brace is selected in order to investigate the additional stress on the framing components. Details at beam-end connection are adopted for the purpose of verifying the influence on the seismic performance of braced frames. Concrete slabs on beams are prepared to investigate the effect on strength of a braced frame. The test results can be summarized as follows: (1) connection eccentricity of brace led to a decrease in the maximum strength and an elastic stiffness of the braced frame; (2) connection detail with narrow pitch of bolts or thin beam web caused local buckling at the beam web; (3) a presence of concrete slabs on beams resulted in increase in lateral strength of the beam-column subassemblies.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



Record appears in:



 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 3645.:
Download fulltext
PDF

Rate this document:

Rate this document:
1
2
3
 
(Not yet reviewed)