现役混凝土坝的抗震安全分析
|
摘要
为了合理评价现役混凝土坝的抗震安全问题,本文通过现场实测数据确定了坝体混凝土在老化过程中形成的损伤。将坝体材料的老化损伤作为初始损伤,以此修正塑性损伤模型,利用该模型对某拱坝进行了抗震安全分析,计算结果表明坝混凝土的老化对坝体动力响应有显著影响,现役混凝土坝的抗震安全评价中应当考虑老化损伤的影响。
To reasonably evaluate seismic safety of inservice concrete dams,the damage caused by the ageing of dam cocrete was obtained based on the field datas in the paper. This ageing damage was regarded as an original damage,and then it was used to modify the the elastoplastic damage model. The renewed model was used to evaluate the seismic safety of an arch dam,the investigation shows that the ageing effects of the concrete on the dam dynamic response is significant and ageing damage should be taken into account in the seismic safety evaluation of the inservice concrete dams.
To reasonably evaluate seismic safety of inservice concrete dams,the damage caused by the ageing of dam cocrete was obtained based on the field datas in the paper. This ageing damage was regarded as an original damage,and then it was used to modify the the elastoplastic damage model. The renewed model was used to evaluate the seismic safety of an arch dam,the investigation shows that the ageing effects of the concrete on the dam dynamic response is significant and ageing damage should be taken into account in the seismic safety evaluation of the inservice concrete dams.
引文
[1]邢林生.混凝土坝老化性状分析研究[J].大坝与安全,2005(3):4-8.XING Linshen.Study on the ageing condition of concrete dams[J].Dam and Safety,2005(3):4-8.(in Chinese)
[2]陈胜宏,何真.混凝土坝服役寿命仿真分析的研究现状及展望[J].武汉大学学报(工学版),2011,44(3):273-280.CHEN Shenghong,HE Zhen.Status quo and prospcts for simulation analysis of service life for concrete dam[J].Engineering Journal of Wuhan University,2011,44(3):273-280.(in Chinese)
[3]朱伯芳.论混凝土坝的使用寿命及实现混凝土坝超长期服役的可能性[J].水利学报,2012,43(1):1-8.ZHU Bofang.On the expected life span of concrete dams and the possibility of endlessly long life of solid concrete dams[J].Journal of Hydraulic Engineering,2012,44(1):1-8.(in Chinese)
[4]徐道远,王向东,朱为玄.混凝土坝的损伤及损伤仿真计算[J].河海大学学报,2002,30(4):14-17.XU Daoyuan,WANG Xiangdong,ZHU Weixuan.Damage to concrete dam and its simulation calculation[J].Journal of Hohai University,2002,30(4):14-17.(in Chinese)
[5]徐俊祥,刘西拉.混凝土初始损伤模拟和在混凝土重力坝抗震分析中的应用[J].上海交通大学学报,2006,40(6):1028-1041.XU Junxiang,LIU Xila.The simulation of initial concrete damage and its application in earthquake analysis of gravity dams[J].Journal of Shanghai Jiaotong University,2006,40(6):1028-1041.(in Chinese)
[2]陈胜宏,何真.混凝土坝服役寿命仿真分析的研究现状及展望[J].武汉大学学报(工学版),2011,44(3):273-280.CHEN Shenghong,HE Zhen.Status quo and prospcts for simulation analysis of service life for concrete dam[J].Engineering Journal of Wuhan University,2011,44(3):273-280.(in Chinese)
[3]朱伯芳.论混凝土坝的使用寿命及实现混凝土坝超长期服役的可能性[J].水利学报,2012,43(1):1-8.ZHU Bofang.On the expected life span of concrete dams and the possibility of endlessly long life of solid concrete dams[J].Journal of Hydraulic Engineering,2012,44(1):1-8.(in Chinese)
[4]徐道远,王向东,朱为玄.混凝土坝的损伤及损伤仿真计算[J].河海大学学报,2002,30(4):14-17.XU Daoyuan,WANG Xiangdong,ZHU Weixuan.Damage to concrete dam and its simulation calculation[J].Journal of Hohai University,2002,30(4):14-17.(in Chinese)
[5]徐俊祥,刘西拉.混凝土初始损伤模拟和在混凝土重力坝抗震分析中的应用[J].上海交通大学学报,2006,40(6):1028-1041.XU Junxiang,LIU Xila.The simulation of initial concrete damage and its application in earthquake analysis of gravity dams[J].Journal of Shanghai Jiaotong University,2006,40(6):1028-1041.(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