In this paper , brief summary and contrast for the analytical methods of arch dam were conducted , the visualization and parameterization of fem , and its implementation were investigated , and the system based on ansys , for the simulation fem analysis of arch dam was developed . and 3 - d nonlinear fem simulation analysis was then carried out for niutoushan arch dam , which is located in shouning county , fujian province of china 本文对拱坝的分析方法做了总结对比，研究了有限元分析中的可视化、参数化方法及它们实施技术，开发了基于ansys平台的拱坝有限元仿真分析系统，并结合实际工程对福建省寿宁县境内牛头山水电站双曲拱坝进行了三维非线性有限元整体稳定仿真分析。
Some primary researches are given in this paper , combined with the project - stability evaluation of concrete high arch dam of tengzigou , which is cooperated between hydraulic structure center of hohai university and dongbei hydroelectric investigation & design ltd . considering actual research work and specification , either concrete strength limit analysis of dam or shear failure of seams in rock abutments are taken singly into account for safety evaluation of high arch dam 本文就这个问题，结合河海大学水工结构所和水利部东北勘测设计研究有限责任公司的合作项目?藤子沟水电站双曲拱坝整体稳定性分析，在这方面做了一些初步研究。现行规范将坝体混凝土强度校核和坝肩稳定安全度评价分开进行，没有考虑两者的关联性，然而这两类破坏常常是相互联系，伴随发生的。
For jiangpinghe double - curved arch dam , 3 - d elasto - plastic fem is made , in which the point safety factors of the dam - abutments system and the safety margin for coefficients of sliding resistance on 7 potential sliding blocks of the dam before and after the reinforcement of the dam are calculated under the conditions of the normal storage level and the design flood level respectively based on the results from the analysis made with fem 摘要对江坪河双曲拱坝进行了三维弹塑性有限元分析，利用有限元应力成果分别计算了正常蓄水位、设计洪水位等3种工况下加固前后坝体坝肩系统的点安全系数和7个可能滑动块体的抗滑富余系数。
This paper deploys research about the damnification identify , employ capacity and reinforce technology with reason of double bend arch bridge through finding out disease position of construct and cause , colligating these result of the actual bridge detection and load test and analysis and research on the theoretics of damnification , and so on , despending on a lots of measure and means , finding out its present condition and checking structure internal force through choosing the proper mechanics model according as a lots of prototype information 本题以安徽省省道s310上k139 + 000处的大店岗桥为实例，从检测入手，利用各种检测方法和手段，了解双曲拱桥的现行工况，并依据各类原型资料选择合适的力学模型进行结构内力验算，通过荷载试验、理论分析等方法，查明结构的病害部位和形成原因，综合实桥检测结果和荷载试验结果以及损伤理论的分析研究等等，展开对双曲拱类桥型的损伤鉴定、使用能力和合理加固技术方法的研究。
The first power station of jinping mountain lies in the west section of the yanglongjiang river from santan to shoupagou gully , with a double - curved arch dam of 305 - meter height and a normal water storage of 1880metres . the exposed strata of the damsite are marbles and arenaceous rocks of triassic and solution fissures have been developed in the marbles of the left - bank ' s dam abutment , and they have become a stratum of strong leakage . as a result , it has been an important problem for the dam foundation to stop leakage 锦屏一级电站位于西雅砻江的三滩至手爬沟河段，坝型为305米高双曲拱坝，正常蓄水位标高1880米。坝址区出露的地层为三叠系杂谷脑组二段大理岩和三叠系杂谷脑组三段的砂板岩。在勘探过程中，发现左岸坝肩大理岩体中的构造裂隙和溶蚀裂隙发育，且成为强渗透地层，为此坝基的防渗成为重要问题。
Combined with the practical project of niutoushan hydropower station , this paper studies the stability of niutoushan arch dam by 3 - d geomechanical model test and nonlinear fem analyse , and gets some useful conclusions and advice . model test theory and finite element method is applied to the study of the arch dam . the main contents of this paper include : 1 本文结合牛头山水电站的具体工程，应用模型试验理论和有限元技术，对牛头山双曲拱坝进行了物理模型试验和数学建模分析，综合研究了拱坝的整体稳定问题，得出了一些有益的结论和建议。
The plane - wave solution of the system of the fluid - gas - dam and the fem model of gas isolations based on the state equation of ideal gas are presented for first time . using this model , the technique feasibility to apply air cushions to xiluodu high arch dam , located in jinsajiang river , is explored deeply and demonstrated . the important results of scientific and practical significance are achieved 在国内外首次提出了在平面波作用下液体-气体-固体动力系统的理论解，分析了大坝隔震气幕的力学性态，首次提出了基于理想气体状态方程的气幕隔震的压力有限元模型，研究了气幕隔震的减震机理和隔震效果，并深入论证了将隔震气幕运用于溪洛渡双曲拱坝的技术可行性和隔震效果，得到了具有重要科学意义和实际价值的成果。
The plane - wave analytic solution of the coupled fluid - air - solid system and the fem model of air cushion isolations are applied to study the influence of air cushion on earthquake response of dams . the calculations show that air isolation will reduce the hydrodynamic pressure significantly and restrain the dam vibrations during earthquakes . if the dam and reservoir is isolated by air cushions , it will decrease the hydrodynamic pressures by more than 90 % and the seismic stresses by 20 - 30 % 将本文首次提出的水体-气体-结构系统的平面波作用理论解和三维有限元模型，应用于溪洛渡双曲拱坝的抗震安全性和气幕隔震可行性研究中，表明气幕对高拱坝具有良好的隔震性能，可降低动水压力90以上，坝体地震拱应力20 30 ，减震效果显著，并使坝体的抗拉安全系数从0 . 93提高到3 . 58 。
