拱坝横缝配筋动力响应的模型试验和计算分析
|
摘要
配置横向跨缝钢筋后,拱坝在动力荷载下的非线性响应是高拱坝领域的一个重要课题。该文在采用脆性材料制作的带横缝配筋拱坝模型的基础上,通过振动台模型试验研究了带横缝拱坝在谐波和地震波作用下的动力响应,并运用改进的拱坝非线性分析有限元程序ADAP-88(增加配筋数值模型)进行计算比较。试验结果验证了横向配筋数值分析模型的正确性,揭示出带横缝拱坝在地震荷载作用下的一些反应规律,包括配置跨缝钢筋可明显减小强震作用下横缝的张开度,防止止水遭到破坏,并明显提高拱坝的整体性。
The nonlinear seismic behavior of arch dams with reinforced contraction joints is one of the key topics in arch dam engineering.The behavior of an arch dam model with brittle materials and reinforced contraction joints was investigated in shaking table tests with harmonic loadings and earthquake waves.The same dynamic process was then simulated with the finite element program of ADAP-88 in which the strengthening effect of the contraction joint reinforcement can be considered.The numerical results agree well with the experimental data.The test results show that the contraction joint openings are significantly reduced by the reinforcements and that the arch dam integrity is obviously improved.
The nonlinear seismic behavior of arch dams with reinforced contraction joints is one of the key topics in arch dam engineering.The behavior of an arch dam model with brittle materials and reinforced contraction joints was investigated in shaking table tests with harmonic loadings and earthquake waves.The same dynamic process was then simulated with the finite element program of ADAP-88 in which the strengthening effect of the contraction joint reinforcement can be considered.The numerical results agree well with the experimental data.The test results show that the contraction joint openings are significantly reduced by the reinforcements and that the arch dam integrity is obviously improved.
引文
[1]Niwa A,Clough R W.Shaking table research on concretedam models[R].University of California at Berkeley,Report No.UCB/EERC-80/05,1980.
[2]Fenves G L,Mojtahedi S,Reimer R B.ADAP-88:Computer program for nonlinear earthquake analysis ofconcrete arch dams[R].University of California atBerkeley,Report No.UCB/EERC-89/12,1987.
[3]徐艳杰.横缝配筋的拱坝地震非线性模型与无限地基影响研究[D].北京:清华大学,1999.XU Yanjie.Seismic nonlinear simulation of arch dams withcontraction joint reinforcements and effects due to infinitecanyon[D].Beijing:Tsinghua University,1999.(in Chinese)
[4]LIU Xinjia,XU Yanjie,WANG Guanglun,et al.Seismicresponse of arch dams considering infinite radiation dampingand joint opening effects[J].J Earthquake Engineering andEngineering Vibration,2002,1(1):65-73.
[5]郭永刚,孙五继,刘宪亮.高拱坝伸缩横缝间布设抗震钢筋的动力反应分析[J].应用力学学报,2007,24(1):16-21.GUO Yonggang,SUN Wuji,LIU Xianliang.Numericalmodeling of aseismic reinforcement between contraction jointsin high arch dam[J].Chinese Journal of AppliedMechanics,2007,24(1):16-21.(in Chinese)
[6]胡晓,侯顺载,王济,等.小湾高拱坝整体及有横缝模型的动力试验研究[J].水力发电,2001(2):48-50.HU Xiao,HOU Shunzai,WANG Ji,et al.Shaking tabletests on Xiaowan arch dam with and without contractionjoints[J].Water Power,2001(2):48-50.(in Chinese)
[2]Fenves G L,Mojtahedi S,Reimer R B.ADAP-88:Computer program for nonlinear earthquake analysis ofconcrete arch dams[R].University of California atBerkeley,Report No.UCB/EERC-89/12,1987.
[3]徐艳杰.横缝配筋的拱坝地震非线性模型与无限地基影响研究[D].北京:清华大学,1999.XU Yanjie.Seismic nonlinear simulation of arch dams withcontraction joint reinforcements and effects due to infinitecanyon[D].Beijing:Tsinghua University,1999.(in Chinese)
[4]LIU Xinjia,XU Yanjie,WANG Guanglun,et al.Seismicresponse of arch dams considering infinite radiation dampingand joint opening effects[J].J Earthquake Engineering andEngineering Vibration,2002,1(1):65-73.
[5]郭永刚,孙五继,刘宪亮.高拱坝伸缩横缝间布设抗震钢筋的动力反应分析[J].应用力学学报,2007,24(1):16-21.GUO Yonggang,SUN Wuji,LIU Xianliang.Numericalmodeling of aseismic reinforcement between contraction jointsin high arch dam[J].Chinese Journal of AppliedMechanics,2007,24(1):16-21.(in Chinese)
[6]胡晓,侯顺载,王济,等.小湾高拱坝整体及有横缝模型的动力试验研究[J].水力发电,2001(2):48-50.HU Xiao,HOU Shunzai,WANG Ji,et al.Shaking tabletests on Xiaowan arch dam with and without contractionjoints[J].Water Power,2001(2):48-50.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心