Effect of Fire on Self-excited Vibration Characteristic of Composite Beams of the Overall Structure
The study shows that, the vibration of structures and members has very obvious self-excited vibration characteristic under the action of fire. Random signals for acceleration distribution of composite beams of the overall structure under the action of fire are collected and auto-spectrum analyzed in this paper. The result shows that: the fire causes selfexcited vibration of composite beams of the overall structure. As the internal forces cause redistribution and structure connections are damaged, amplitude, frequency and vibration characteristic excited by external forces of composite beams are different, and fluctuating decrease occurs to vibration frequency of composite beam in the test. Test results provide data support for the establishment of fire vibration theory and healthy detection of structures in case of fire.
Self-excited vibration characteristic Fire Overall structure Experimental study
Jun Li Lv Yu Li Dong Jian Dong Sun
School of Civil Engineering, Harbin Institute of Technology, Harbin, P.R. 150090, China(Correspondin School of Civil Engineering, Harbin Institute of Technology, Harbin, P.R. 150090, China(Correspondin Shandong provincial academy of building research, jina, Shandong, 250000,china
国际会议
上海
英文
760-764
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）