Based on the arch - cantilever method , the stability of arch ring and cantilever beam against elastic buckling in arch dams are analyzed with the theory of elastic stability , and the conclusion is drawn that the stability of arch dam against elastic buckling is governed by the top arch ring 按照拱梁分载法的思想，用弹性稳定理论分别对拱坝的拱圈和悬臂梁的抗屈曲稳定性进行了分析，得出拱坝的抗屈曲稳定性由坝顶拱圈控制的结论。
The influence of hanger damage on the archring strain mode is also considered and get the conclusion that there is no much change in strain mode when the damaged hangers is small . therefore , network can still gives good results when some hangers are damaged lightly 本文还对吊杆损伤对拱肋应变模态的影响进行了初步分析，认为少量吊杆的损伤不会对拱肋的应变模态产生很大的影响，即在少数吊杆存在损伤时，网络仍能对拱肋的损伤进行识别。
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。
Focuses are then put on the flexural torsional buckling analysis of mono - symmetry i - section arches . closed form solutions are obtained for arches subjected to uniformly distributed radial load and to equal and opposite end moments . effects of different laying positions and of asymmetry of cross - section on buckling loads are included 在这个基础上，对单轴对称工字形截面拱在均匀受压和均匀弯曲条件下的屈曲问题进行研究，给出临界荷载的理论解答；分析了工字形截面不同放置形式和截面不对称性对拱临界荷载的影响，并与已有的理论进行比较。
The paper puts great emphasis on studying the mechanical performance and the carrying capacity of concrete - filled steel tubular ( cfst ) , verifies the cyclo - hoop effect which steel tubular has exert to the concrete in cfst through the tridimensional finite element analysis of the entity of the arch rib , and proves that the cyclo - hoop effect is utilized to increase the axial compression cfst member carrying capacity 本文着重研究了钢管混凝土结构的力学性能及承载能力，通过对拱肋实体所作的三维有限元分析，验证了钢管混凝土拱桥中钢管对混凝土的环箍效应，证明了由于环箍效应的存在，使内填式钢管混凝土轴压承载力大大提高。
The effect of cold wave , layer thickness of construct and sluice to temperature field and stress field are studied . this paper analysis the effect of the first stage cooling and the second stage cooling . pertinent measures of temperature control and crack prevention are suggested , settling the practice problems in projects 重点研究了寒潮、浇筑层厚和蓄水等对拱坝混凝土温度场和应力场的影响；对坝体一期冷却和二期冷却的冷却效果进行了详细分析；并针对性地提出了相应的温控防裂措施，以解决工程实际问题。
Then , a thorough discussion and sum ? p about the main construction process of cfst tied ? rch bridge without wind bracing is presented in the paper in association with the construction practice of the bridge . in addition , the author put emphasis on the static calculation of two point integral hoisting construction method in single cfst arch rib . futhermore , the stabilization of arch rib in construction and service stage are analyzed detailedly 本文结合该大桥的施工实践，对无风撑钢管混凝土系杆拱桥的主要工艺施工流程进行了全面论述和总结，并重点对单片钢管拱肋两点整体吊装的结构受力进行了静力计算及对拱肋在施工和运营阶段的稳定进行了分析。
Based on the discuss of the geologic environment of the high slope of spandrel groove jinping i hydroelectric power station . and the engineering geological conditions of rock mass are carefully studied in the paper . the modified csmr are adopted to perform the classification of the slope rock mass , the results of which are combined with the macroscopic stability of the high slope . on the basis of these , the methods of geological diagnosis and the finite element analysis are applied to analyze and compute the overall stability of the high slope 本文在阐明锦屏一级水电站坝区岩体的形成和演化特征的基础上，详细研究了拱肩槽高边坡岩体的结构特征及岸坡岩体浅表生改造特征，建立了岸坡岩体浅表生改造与岸坡演化模式，分析研究了岩体的物理力学性质，采用修正的csmr法对拱肩槽高边坡的岩体质量进行分级研究，在此上基础之上，采用地质分析判断和有限元分析等方法，对高边坡整体稳定性进行了系统分析、计算与评价；应用块体理论对高边坡的局部稳定性进行了分析计算，确定局部不稳定块体的规模、出露范围，从而对拱肩槽高边坡的局部稳定性有了系统全面的认识和了解。
In this thesis , stress distribution , concrete cracking and its propagating , and failure mechanism of the orifice of the xiao wan arch dam , as well as the influence of reinforcing bars are studied by both experimental tests and nonlinear analysis . also , the improvement of the performance of the orifice in cracking control by using steel fiber reinforced concrete is studied . these works are useful for the design of the orifice in arch dams 本文采用试验研究与计算分析相结合的研究方法，结合小湾工程，对拱坝底孔在不同工况下的应力分布、混凝土开裂、裂缝扩展和孔口破坏规律，以及配筋方式、数量对其影响进行了研究，并利用有限元方法对采用钢纤维混凝土提高孔口的抗裂性能和限裂性能进行有益的探讨，为安全可靠、经济合理地设计拱坝孔口提供理论依据。
In this article , according to heat conduction theory , elastic creep theory and finite element theory , the temperature field and creep stress field in the arch dam during construction and operation are simulated and analyzed by means of three dimensional finite element relocating mesh method , and the distribution law of the temperature field and creep stress field in the arch dam during construction and operation are systematically studied , and according to the construction process of concrete arch dam , the effect of lamination placement , construction interval , elastic modulus change , thermal insulation change , surrounding temperature change , concrete creep and autogenous volume change on thermal stress in the arch dam are also considered 论文根据热传导理论、弹性徐变理论及有限元理论，用三维有限元浮动网格法对拱坝施工期和运行期温度场、徐变应力场进行了全过程仿真分析，较为系统的研究了混凝土拱坝施工期和运行期温度场、徐变应力场的分布规律，在分析中按照混凝土拱坝施工过程，考虑了混凝土分层浇筑、施工间隙时间、弹模变化、绝热温升过程、环境温度的变化、混凝土徐变、自生体积变形等因素对坝体温度应力的影响。
