考虑温度荷载的丹江口大坝非线性地震反应分析
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摘要
在目前的规范中,混凝土重力坝地震分析时是不须要考虑温度荷载的,但对于丹江口大坝加高工程,众多的研究及现场的监测数据表明,丹江口大坝新老混凝土结合面开裂主要是由于温度应力引起的。为更为详实地反映大坝的实际情况,在考虑温度荷载和新老混凝土结合面开裂状态的基础上,对丹江口大坝进行了非线性地震反应分析。
By the present Chinese design codes,temperature load in seismic analysis of concrete gravity dam is not required.The studies and monitoring data of the Danjiangkou dam reinforcing project,however,indicate that temperature load caused cracking and opening of the joints between the old and new concrete layers.This paper presents an analysis of nonlinear dynamic response of this dam,focusing on the effect of temperature load on these joints.
By the present Chinese design codes,temperature load in seismic analysis of concrete gravity dam is not required.The studies and monitoring data of the Danjiangkou dam reinforcing project,however,indicate that temperature load caused cracking and opening of the joints between the old and new concrete layers.This paper presents an analysis of nonlinear dynamic response of this dam,focusing on the effect of temperature load on these joints.
引文
[1]混凝土重力坝设计规范(SL319-2005)[S].中华人民共和国水利部,2005.Design specification for concrete gravity dams(SL319-205)[S].The Ministry of Water Conservancy of the People's Republic ofChina,2005.(in Chinese)
[2]颜天佑,钮新强,李同春,等.已有裂缝重力坝加高后的工作性态[J].水利水电科技进展,2009,29(1):47～51.YAN Tianyou,NIU Xinqiang,LI Tongchun,et al.Working behavior analysis for heightening a gravity dam with longitudinal cracks[J].Advances in Science and Technology of Water Conservancy and Hydropower,2009,29(1):47～51.(in Chinese)
[3]肖汉江,李祖民.大坝加高试验温度应力仿真计算与原型监测对比分析[J].长江科学院院报.2002,19(S):54～56.XIAO Hanjiang,LI Zumin.Comparison of emulation computation results on thermal stress with prototype monitoring data inheightening test of Danjiangkou Dam[J].Journal of Yangtze River Scientific Research Institute,2002,19(S):54～56.(inChinese)
[4]中国水利水电科学研究院.丹江口大坝加高关键技术研究专题研究报告[R].2006.7.China Institute of Water Resources and Hydropower Research.Special research report of the key technologies in the heighteningproject of Danjiangkou Dam[R].2006.7.(in Chinese)
[5]赵兰浩.考虑坝体-库水-地基相互作用的有横缝拱坝地震响应分析[D].河海大学,2006.ZHAO Lanhao.Seismic analysis of arch dams with contraction joints and dam-water-foundation interaction[D].Hohai University.2006.(in Chinese)
[6]Deeks A J,Randolph M F.Axisymmetric time-domain transmitting boundaries[J].Journal of Engineering Mechanics,1994,120(1):25～42.
[7]赵兰浩,李同春,牛志伟.有初始间隙摩擦接触问题的有限元混合法[J].岩土工程学报,2006,28(11):2015～2018.ZHAO Lanhao,LI Tongchun,NIU Zhiwei.Mixed finite element method for contact problems with friction and initial gaps[J].Chinese Journal of Geotechnical Engineering.2006,28(11):2015～2018.(in Chinese)
[2]颜天佑,钮新强,李同春,等.已有裂缝重力坝加高后的工作性态[J].水利水电科技进展,2009,29(1):47～51.YAN Tianyou,NIU Xinqiang,LI Tongchun,et al.Working behavior analysis for heightening a gravity dam with longitudinal cracks[J].Advances in Science and Technology of Water Conservancy and Hydropower,2009,29(1):47～51.(in Chinese)
[3]肖汉江,李祖民.大坝加高试验温度应力仿真计算与原型监测对比分析[J].长江科学院院报.2002,19(S):54～56.XIAO Hanjiang,LI Zumin.Comparison of emulation computation results on thermal stress with prototype monitoring data inheightening test of Danjiangkou Dam[J].Journal of Yangtze River Scientific Research Institute,2002,19(S):54～56.(inChinese)
[4]中国水利水电科学研究院.丹江口大坝加高关键技术研究专题研究报告[R].2006.7.China Institute of Water Resources and Hydropower Research.Special research report of the key technologies in the heighteningproject of Danjiangkou Dam[R].2006.7.(in Chinese)
[5]赵兰浩.考虑坝体-库水-地基相互作用的有横缝拱坝地震响应分析[D].河海大学,2006.ZHAO Lanhao.Seismic analysis of arch dams with contraction joints and dam-water-foundation interaction[D].Hohai University.2006.(in Chinese)
[6]Deeks A J,Randolph M F.Axisymmetric time-domain transmitting boundaries[J].Journal of Engineering Mechanics,1994,120(1):25～42.
[7]赵兰浩,李同春,牛志伟.有初始间隙摩擦接触问题的有限元混合法[J].岩土工程学报,2006,28(11):2015～2018.ZHAO Lanhao,LI Tongchun,NIU Zhiwei.Mixed finite element method for contact problems with friction and initial gaps[J].Chinese Journal of Geotechnical Engineering.2006,28(11):2015～2018.(in Chinese)
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