WIRE-ROPE BRACING SYSTEM WITH ELASTO-PLASTIC DAMPERS FOR SEISMIC RESPONSE REDUCTION OF STEEL FRAMES
Elasto-plastic dampers can reduce story drift of the frames and retain elasticity of structural members by adding hysteretic damping and stiffness. Extremely severe earthquakes, however, might cause large story displacement even for frames with the dampers. This paper presents a new bracing system for preventing large story displacement. The system uses wire ropes as brace members to eliminate brace-buckling entirely. The braced frames can increase the lateral strength without reducing energy dissipation characteristics of the moment frames by delaying the brace action. Comparison of the loading test results for the portal steel moment frames with and without wire-rope bracing members shows the fundamental characteristics of the bracing system. Numerical response analyses are performed for the three-story moment-resisting frames with and without the bracing and damping members. The characteristics and effectiveness of the bracing system are discussed in light of those test and analysis results.
bracing elasto-plastic damper loading test seismic response analysis
X. Hou H. Tagawa
Graduate School of Environment Studies, Nagoya University, Nagoya, Japan
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）