The second problem analyzed is seismic reliability of concrete dam , the artificial neural network model of seismic reliability of concrete gravity dam and concrete arch dam is proposed 第二个分析的问题是混凝土坝的抗震可靠度问题，应用人工神经网络技术建立混凝土重力坝和拱坝的抗震可靠度模型。
Coupled seepage and temperature fields in longtan roller compacted concrete gravity dam are analyzed by applying the mathematical model for coupled seepage and temperature fields in concrete dam 应用混凝土坝渗流场与温度场耦合分析的数字模型，进行了龙滩碾压混凝土重力坝稳定渗流场与稳定温度场的耦合分析。
Dam 53 of yunfeng concrete gravity dam was computed using finite element method in this paper . considering that the axial length of the dam , it was treated as plane strain problem 本文采用有限单元法计算了云峰混凝土重力坝的53号坝段，由于云峰大坝沿轴线的长度较大，因此在有限元计算中可以作为平面应变问题来处理。
Firstly , fundamental formulations of finite element method about plane problem in elastic mechanics were deduced , some principles about concrete gravity dam were discussed , stress of concrete gravity dam under static load were solved 首先，推导了弹性力学平面问题的有限元基本公式，并讨论了混凝土重力坝有限元计算的一些处理原则，解决了静力工况下混凝土重力坝的应力计算问题。
On the basis of optimum control solution theory , the dynamic parameter discernment model of concrete gravity dam under the priori restraint conditions has been set up and a restraint variable - dimension method for finding the solutions of such model has been put forward 基于最优控制解的理论，建立了引入先验约束条件的混凝土重力坝动态参数识别模型，提出了求解该模型的约束变尺度方法。
Taking into account of water level and temperature , horizontal displacement monitoring control index of typical monolith of huangtankou concrete gravity dam is determined by the improved method of probability , which can be used as a reference for dam safety monitoring 综合考虑水位温度对坝体位移的影响，采用改进小概率法，拟定了黄坛口重力坝坝顶水平位移监控指标，为今后一定时段内大坝安全监控提供参考。
Through analyzing the seepage observation data of huangtankou concrete gravity dam , foundation seepage behavior are reasonably evaluated . the reason of seepage force rising of individual monolith is impervious elements " flaw and drain holes " block . 4 分析黄坛口大坝坝基渗流监测资料，正确评价了坝基防渗排水系统的工作状态，指出了个别坝段渗透压力升高是由于坝基防渗帷幕缺陷和排水孔被堵造成，为工程加固提供了科学依据。
Secondly , to analyze seismic response of the concrete gravity dam , subspace iterative method was applied to compute free vibration period of the dam , time integration method was built up for the seismic time history analysis and formulation of coupled vibration of reservoir water and dam were also deduced 其次，针对混凝土重力坝的地震响应分析问题，采用子空间迭代法计算了大坝的自振周期，建立了地震时程分析的逐步积分方法，并且推导了库水和坝体耦合振动的理论公式。
Based on the theory of inverse analysis in mechanics and engineering and combined with the concrete gravity dam of manwan hydro power plant , a back - analysis model including the prior information was built and artificial neural network ( ann ) , according to which powerful nonlinear mapping ability , was used to predict the future physical parameters of the concrete 在此基础上，以大规模有限元分析软件ansys为平台，二次开发了漫湾水电站砼重力坝运行状态分析系统，根据大坝运行监测资料，对该电站大坝进行了砼力学参数反分析、砼力学参数预测分析以及大坝运行状态分析。
In this paper , temperature field and thermal stress of baise 6aa roller compacted concrete gravity dam section are calculated and analyzed , and the distribution laws of the temperature field and the thermal stress field during construction and operation of 6aa dam section and its foundation whose top is made of f6 fault concrete tuck , are mainly studied 本论文通过百色碾压混凝土重力坝6aa坝段温度场和温度徐变应力场的仿真计算分析，主要研究6aa坝段及基础部位f6断层混凝土塞施工期及运行期的温度场和应力场的分布规律。
