Seismic Behavior of Steel Moment Resisting Frame Connections
碩士 === 國立交通大學 === 土木工程系 === 87 === The 1994 Northridge earthquake caused widespread and unexpected damage to the standard connections of moment resisting frames. Numerous bolted web-welded flange connections to be having brittle failure before fully developing ductility to dissipate energ...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
1999
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| Online Access: | http://ndltd.ncl.edu.tw/handle/14381741925114233058 |
| Summary: | 碩士 === 國立交通大學 === 土木工程系 === 87 === The 1994 Northridge earthquake caused widespread and unexpected damage to the standard connections of moment resisting frames. Numerous bolted web-welded flange connections to be having brittle failure before fully developing ductility to dissipate energy. This research presents the results of standard connections tests, as the fundamental background to develop the improved connections.
The experimental research was conducted to study the ultimate moment strength, ductility performance and plastic rotation of bolted web-welded flange connections. Tests of two large-scale specimens were conducted on single cantilever assemblage subjected to cyclic loads. Weld metal with adequate notch toughness was used in full-penetration welding. In order to evaluate the stress distribution and performance of various types of connections, the finite element analysis was utilized. Experimental and analytical study demonstrated the geometric discontinuity of assess-hole caused the initial crack because of stress concentration. The improved types of connections suggested by analytical study can reduce the stress demand of column face effectively
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