基于反应谱法的胶凝砂砾石坝地震反应有限元分析  

Finite element analysis of seismic response of a cement sand and gravel dam based on response spectrum method

作　　者：刘艳华 严俊[2] 杨玉坚 成鑫 谢定松[2] 吴帅峰 孙黎明 LIU Yanhua;YAN Jun;YANG Yujian;CHENG Xin;XIE Dingsong;WU Shuaifeng;SUN Liming(Yunnan Infrastructure Investment Co.,Ltd,Kunming 650032,Yunnan,China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100048,China;Water Resources&Hydropower Survey&Design Institute Co.,Ltd,Lijiang 674100,Yunnan,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,Jiangsu,China)

机构地区：[1]云南建设基础设施投资股份有限公司,云南昆明650032 [2]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100048 [3]丽江市水利水电勘测设计研究院有限公司,云南丽江674100 [4]河海大学水利水电学院,江苏南京210098

出　　处：《水利水电技术（中英文）》2023年第S01期68-73,共6页Water Resources and Hydropower Engineering

基　　金：国家重点研发计划课题“2019YFC1509800”;流域水循环模拟与调控国家重点实验室自主研究课题“SKL2020ZY09”。

摘　　要：为了评价云南省内某胶凝砂砾石坝的抗震安全性,采用反应谱法对大坝开展地震动力反应计算,获得大坝动位移、加速度和动应力分布规律。计算表明:大坝在Ⅷ度地震作用下,动位移和加速度反应分布符合一般规律,其中三向动位移极值分别为0.41 cm、0.15 cm和0.14 cm,三向加速度极值分别为9.18 m/s^(2)、6.02 m/s^(2)和4.47 m/s^(2)。静动叠加后,大坝顺河向、竖向和坝轴向拉应力极值分别为0.75 MPa、2.00 MPa和0.58 MPa,顺河向、竖向和坝轴向压应力极值分别为-2.53 MPa、-1.65 MPa和-2.79 MPa,拉应力和压应力极值均小于相应筑坝材料的抗拉和抗压强度。总体上,大坝地震反应规律性好,抗震安全高,地震作用下坝体不会出现动力破坏问题。In order to evaluate the seismic safety of a cement sand and gravel dam in Yunnan Province,the seismic dynamic response of the dam was calculated using the response spectrum method,and the distribution laws of the dam′s dynamic displacement,acceleration and dynamic stress were obtained.The calculation shows that the response distribution of dynamic displacement and acceleration of the dam under the earthquake of magnitudeⅧaccords with the general law,in which the extreme values of three-dimensional dynamic displacement are 0.41 cm,0.15 cm and 0.14 cm,and the extreme values of three-dimensional acceleration are 9.18 m/s^(2),6.02 m/s^(2) and 4.47 m/s^(2),respectively.Based on static and dynamic stress superposition,the extreme values of tensile stress along the river,vertical and axial direction of the dam are 0.75 MPa,2.00 MPa and 0.58 MPa,and the extreme values of compressive stress along the river,vertical and axial direction of the dam are-2.53 MPa,-1.65 MPa and-2.79 MPa,respectively.The extreme values of tensile stress and compressive stress are less than the tensile and compressive strength of the corresponding dam materials.On the whole,the dam has good regularity of earthquake response and high seismic safety,thus the dam body will not be damaged under the earthquake.

关 键 词：反应谱法 动位移 加速度 动应力 胶凝砂砾石坝 

分 类 号：P315.9[天文地球—地震学] TB115[天文地球—固体地球物理学]