通过试验研究了低周疲劳损伤对钢筋混凝土柱动力特性的影响;采用自由衰减法测试并分析了钢筋混凝土柱的刚度和阻尼随损伤发展的变化趋势;通过回归分析建立了与动刚度损伤相联系的阻尼比试验统计公式;根据损伤柱等效截面静刚度与动刚度之间的统计关系,进一步建立了阻尼比与静刚度损伤的试验统计公式。分析结果表明:钢筋混凝土柱的阻尼比随其刚度的降低而逐渐增大,动刚度损伤和静刚度损伤均能够反映阻尼比的变化趋势。
Abstract
Influences of low-cycle fatigue damage on dynamic performance of reinforced concrete (RC) columns were studied by tests. Using free vibration method, variational tendencies of rigidity and damping of RC columns with damage development were tested and analyzed. A testing statistics formula for the damping ratio related with damage of dynamic rigidity was established. Furthermore, based on statistical relationship between static rigidity and dynamic rigidity of equivalent section for damage column, the testing statistics formula for the damping ratio and damage of static rigidity was proposed. The analysis results show that the damping ratios of RC columns gradually increase with its reduction of rigidity. The variational tendency of damping ratio can be reflected by damage of dynamic and static rigidity.
关键词
桥梁工程 /
钢筋混凝土柱 /
阻尼性能试验 /
低周疲劳 /
损伤 /
刚度
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Key words
bridge engineering /
reinforced concrete column /
damping performance test /
low-cycle fatigue /
damage /
rigidity
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中图分类号：
U443.22
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参考文献
[1] 刘铁军,欧进萍.水泥砂浆强度和阻尼增强掺料及试验[J].低温建筑技术,2003(1):7-10.
LIU Tie-jun,OU Jin-ping.Reinforcing Admixtures and Their Effectiveness Experiments for Strength and Damping of Cement Mortar Components[J].Low Temperature Architecture Technology,2003(1):7-10.
[2]HART G C,VASUDEVAN R.Earthquake Design of Building: Damping[J].Journal of the Structural Div-ision,1975,101(1):185-192.
[3]LAZAN B J.Damping of Materials and Members in Structural Mechanics[M].Oxford:Pergamon Press,1966:205-249.
[4]比尔兹 C F.结构振动分析[M].朱世杰,陈玉琼,译.北京:中国铁道出版社,1988:105-138.
BEARDS C F.Structural Vibration Analysis[M].Translated by ZHU Shi-jie,CHEN Yu-qiong.Beijing:China Railway Publishing House,1988:105-138.
[5]张相庭.结构阻尼耗能假设及其在振动计算中的应用[J].振动与冲击,1982,8(2):12-21.
ZHANG Xiang-ting.Study on Assumptions of Damping Dissipation and Its Applications in Vibration Calculation[J].Journal of Vibration and Shock,1982,8(2):12-21.
[6]CELEBI M.Comparison of Damping in Buildings Under Low-amplitude and Strong Motions[J].Journal of Wind Engineering and Industrial Aerodynamics,1996,59(2/3):309-323.
[7]LIANG Z,LEE G C.Representation of Damping Matrix[J].Journal of the Structural Engineering,1991,117(5):560-565.
[8]黄宗明.结构地震反应时程分析中的阻尼研究[D].重庆:重庆建筑大学,1995:8-35.
HUANG Zong-ming.An Investigation of Damping in Earthquake Response Time History Analysis of Structures[D].Chongqing:Chongqing Jianzhu University,1995:8-35.
[9]CLOUGH R W,PENZIEN J.Dynamics of Structures[M].2nd ed.New York:McGraw-Hill Inc.,1993.
[10]董 聪,范立础,陈肇元.结构智能健康诊断的理论与方法[J].中国铁道科学,2002,23(11):11-24.
DONG Cong,FAN Li-chu,CHEN Zhao-yuan.Theory and Method for Structural Intelligent Health Diagnosis[J].China Railway Science,2002,23(11):11-24.
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脚注
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基金
国家自然科学基金项目(50978015);“十一五”国家科技支撑计划项目(2006BAJ27B02)
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