高拱坝横缝间布设SMA耗能棒材的减震分析与研究
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摘要
建立高拱坝横缝非线性接触模型,将形状记忆合金(SMA)耗能棒材引入高拱坝结构的非线性抗震分析中,实现该耗能阻尼器力学元件的数值模拟,探讨其控制原理和方法。通过对不同结构进行计算分析,结果表明,与布设普通钢筋相比,应用SMA耗能阻尼构件对高拱坝在强震作用下的横缝张开度的控制效果更为明显,并能有效地减小坝体结构的加速度响应,对坝体结构的应力分布规律影响不大。该减震控制装置构造简单,便于施工安装。
A nonlinear contact numerical model of high arch dams with contraction joints is established for transient simulations.Restrainer bars of shape memory alloys(SMA) are adopted to reduce the nonlinear seismic response of arch dams,and simulation method of their energy damping and control mechanism is discussed.Simulation results with various earthquake resistance measures show that these bars are more effective in limiting joints opening and seismic acceleration than traditional joint reinforcements,while they cause little effect on stress distribution.
A nonlinear contact numerical model of high arch dams with contraction joints is established for transient simulations.Restrainer bars of shape memory alloys(SMA) are adopted to reduce the nonlinear seismic response of arch dams,and simulation method of their energy damping and control mechanism is discussed.Simulation results with various earthquake resistance measures show that these bars are more effective in limiting joints opening and seismic acceleration than traditional joint reinforcements,while they cause little effect on stress distribution.
引文
[1]朱伯芳,高季章,陈祖煜.拱坝设计与研究[M.]北京:中国水利水电出版社,2002:459.ZHU Bofang,GAO Jizhang,CHEN Zuyu.Design and Research for Concrete Arch Dams[M.]Beijing:China Waterpower Press.2002:459.(in Chinese)
[2]郭永刚,涂劲,陈厚群.高拱坝伸缩横缝间布设阻尼器对坝体地震反应影响的研究[J].世界地震工程.2003,19(13):44～49.GUO Yonggang,TU Jin,CHEN Houqun.Study on effect of damper between contraction joints on seismic response of the high archdam[J].World Earthquake Engineering.20031,9(3):44～49.(in Chinese)
[3]罗秉艳,徐艳杰,王光纶.大岗山拱坝考虑阻尼器抗震措施的非线性动力反应分析[J.]水力发电学报.2007,26(1):67～70.LUO Bingyan,XU Yanjie,WANG Guanglun.Nonlinear dynamic analysis of Dagangshan arch dam with considering damperreinforcement[J].Journal of Hydroelectric Engineering.2007,26(1):67～70.(in Chinese)
[4]欧进萍.结构振动控制—主动、半主动和智能控制[M.]北京:科学出版社,2003.Ou Jinping.Structural vibration control—actives,emi-active and intelligent control[M.]Beijing:Science Press,2003.(in Chinese)
[5]Des Roches M,Delemont R.Seismic retrofit of simply supported bridges using shape memory alloys[J.]Engineering Structures.2002,24:325～332.
[6]Mauro Dolce,Donatello Cardone.Mechanical behaviour of shape memory alloys for seismic applications[J.]International Journal ofMechanical Sciences,2001,43:2631～2656.
[2]郭永刚,涂劲,陈厚群.高拱坝伸缩横缝间布设阻尼器对坝体地震反应影响的研究[J].世界地震工程.2003,19(13):44～49.GUO Yonggang,TU Jin,CHEN Houqun.Study on effect of damper between contraction joints on seismic response of the high archdam[J].World Earthquake Engineering.20031,9(3):44～49.(in Chinese)
[3]罗秉艳,徐艳杰,王光纶.大岗山拱坝考虑阻尼器抗震措施的非线性动力反应分析[J.]水力发电学报.2007,26(1):67～70.LUO Bingyan,XU Yanjie,WANG Guanglun.Nonlinear dynamic analysis of Dagangshan arch dam with considering damperreinforcement[J].Journal of Hydroelectric Engineering.2007,26(1):67～70.(in Chinese)
[4]欧进萍.结构振动控制—主动、半主动和智能控制[M.]北京:科学出版社,2003.Ou Jinping.Structural vibration control—actives,emi-active and intelligent control[M.]Beijing:Science Press,2003.(in Chinese)
[5]Des Roches M,Delemont R.Seismic retrofit of simply supported bridges using shape memory alloys[J.]Engineering Structures.2002,24:325～332.
[6]Mauro Dolce,Donatello Cardone.Mechanical behaviour of shape memory alloys for seismic applications[J.]International Journal ofMechanical Sciences,2001,43:2631～2656.
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