带横缝拱坝地震破坏机理的振动台试验研究
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摘要
本文通过脆性材料制作的带横缝拱坝模型,采用逐步加大的谐波荷载,考察拱坝的动力破坏机理。通过对模型拱坝整个破坏过程的观测,重点研究不同破坏阶段模型拱坝在动力荷载作用下的一些反应规律。同时,结合试验模型坝体的破坏历程,对拱坝计算专用有限元程序ADADP-88的合理性做进一步验证,为工程实际的破坏计算预估奠定基础。
To explore the seismic failure pattern of arch dams,a model of an arch dam with contraction joints is tested on a shaking table. A finite element program ADAP-88(arch dam analysis program) is employed to predict the initiation and development of cracks. From the results of the damaged model with tensile cracks near the two abutments under the increasing harmonic loadings,the seismic failure pattern of the arch dams with contraction joints is described in details. The test results are also compared with the numerical prediction of ADAP-88. The comparison clearly shows that the numerical prediction is accurate in the initial and increased crack loadings.
To explore the seismic failure pattern of arch dams,a model of an arch dam with contraction joints is tested on a shaking table. A finite element program ADAP-88(arch dam analysis program) is employed to predict the initiation and development of cracks. From the results of the damaged model with tensile cracks near the two abutments under the increasing harmonic loadings,the seismic failure pattern of the arch dams with contraction joints is described in details. The test results are also compared with the numerical prediction of ADAP-88. The comparison clearly shows that the numerical prediction is accurate in the initial and increased crack loadings.
引文
[1]Niwa A,Clough R W.Shakingtable research on concrete dam models[R].University of California at Berkeley,Report No.UCB/EERC-80/05.
[2]胡晓,侯顺载,王济.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,2001,27(2):48～50.HUXiao,HOUShunzai,WANGJi,et al.Shakingtable tests on Xiaowan arch damwith and without contractionjoints[J].Water Power,2001,27(2):48～50.(in Chinese)
[3]王海波,李德玉,陈厚群.拱坝振动台动力破坏试验研究[J].土木工程学报,2006,39(7):109～118.WANG Haibo,LI Deyu,CHEN Houqun.Experimental study on the dynamic failure of arch dams using a shaking table[J].China Civil Engineering Journal,2006,39(7):109～118.(in Chinese)
[4]陈健云,林皋,李静.高拱坝的非线性开裂静动力响应分析[J].世界地震工程,2001,17(3):85～90.CHENJianyun,LIN Gao,LI Jing.Nonlinear static-dynamic cracking response analysis of high arch dams[J].World Information on Earthquake Engineering,2001,17(3):85～90.(in Chinese)
[5]杜成斌.设缝高拱坝的破坏机理研究.长江科学院院报[J].2002,19(5):21～23.Du Chengbin.Failure mechanismof high arch damwithjoints[J].Journal of Yangtze River Scientific ResearchInstitute,2002,19(5):21-23.(in Chinese)
[6]Gregory L Fenves,Soheil Mojtahedi,Rechard B Reimer.ADAP-88:Computer Programfor Nonlinear Earthquake Analysis of Concrete Arch Dams[R].University of California at Berkeley,Report No.UCB/EERC-89/12,1987.
[7]盛志刚,张楚汉,王光纶,等.拱坝横缝非线性动力响应的模型试验和计算分析[J].水力发电学报,2003,22(1):34～43.SHENGZhigang,ZHANG Chuhan,WANG Guanglun,et al.Shakingtable tests and numerical analysisfor nonlinear seismic behavior of an arch dam model with contractionjoints[J].Journal of Hydroelectric Engineering,2003,22(1):34～43.(in Chinese)
[2]胡晓,侯顺载,王济.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,2001,27(2):48～50.HUXiao,HOUShunzai,WANGJi,et al.Shakingtable tests on Xiaowan arch damwith and without contractionjoints[J].Water Power,2001,27(2):48～50.(in Chinese)
[3]王海波,李德玉,陈厚群.拱坝振动台动力破坏试验研究[J].土木工程学报,2006,39(7):109～118.WANG Haibo,LI Deyu,CHEN Houqun.Experimental study on the dynamic failure of arch dams using a shaking table[J].China Civil Engineering Journal,2006,39(7):109～118.(in Chinese)
[4]陈健云,林皋,李静.高拱坝的非线性开裂静动力响应分析[J].世界地震工程,2001,17(3):85～90.CHENJianyun,LIN Gao,LI Jing.Nonlinear static-dynamic cracking response analysis of high arch dams[J].World Information on Earthquake Engineering,2001,17(3):85～90.(in Chinese)
[5]杜成斌.设缝高拱坝的破坏机理研究.长江科学院院报[J].2002,19(5):21～23.Du Chengbin.Failure mechanismof high arch damwithjoints[J].Journal of Yangtze River Scientific ResearchInstitute,2002,19(5):21-23.(in Chinese)
[6]Gregory L Fenves,Soheil Mojtahedi,Rechard B Reimer.ADAP-88:Computer Programfor Nonlinear Earthquake Analysis of Concrete Arch Dams[R].University of California at Berkeley,Report No.UCB/EERC-89/12,1987.
[7]盛志刚,张楚汉,王光纶,等.拱坝横缝非线性动力响应的模型试验和计算分析[J].水力发电学报,2003,22(1):34～43.SHENGZhigang,ZHANG Chuhan,WANG Guanglun,et al.Shakingtable tests and numerical analysisfor nonlinear seismic behavior of an arch dam model with contractionjoints[J].Journal of Hydroelectric Engineering,2003,22(1):34～43.(in Chinese)
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