철골모멘트 용접접합부의 내진성능에 미치는 합성슬래브의 영향 (Effects of Composite Floor Slab on Seismic Performance of Welded Steel Moment Connections)
| Author(s): |
Cheol Ho Lee
Jong Hyun Jung Jeong Jae Kim |
|---|---|
| Medium: | journal article |
| Language(s): | Korean |
| Published in: | Journal of Korean Society of Steel Construction (한국강구조학회 논문집), October 2014, n. 5, v. 26 |
| Page(s): | 385 |
| DOI: | 10.7781/kjoss.2014.26.5.385 |
| Abstract: | Traditionally, domestic steel design and construction practice has provided extra shear studs to moment frame beams even when they are designed as non-composite beams. In the 1994 Northridge earthquake, connection damage initiated from the beam bottom flange side was prevalent. The upward moving of the neutral axis due to the composite action between steel beam and floor deck was speculated to be one of the critical causes. In this study, full-scale seismic testing was conducted to investigate the side effects of the composite action in steel seismic moment frames. The specimen PN700-C, designed following the domestic connection and floor deck details, exhibited significant upward shift of the neutral axis under sagging (or positive) moment, thus producing high strain demand on the bottom flange, and showed a poor seismic performance because of brittle fracture of the beam bottom flange at 3% story drift. The specimen DB700-C, designed by using RBS connection and with the details of minimized floor composite action, exhibited superior seismic performance, without experiencing any fracture or concrete crushing, almost identical to the bare steel counterpart (specimen DB700-NC). The results of this study clearly indicate that the beams and connections in seismic steel moment frames should be constructed to minimize the composite action of a floor deck if possible. |
| Keywords: |
seismic performance connections brittle failure steel moment frame Composite floor slab
|
- About this
data sheet - Reference-ID
10326373 - Published on:
25/10/2019 - Last updated on:
25/10/2019
Structurae cooperates with
