【作者】 韩斌；

【导师】 袁卫宁；

【作者基本信息】 长安大学 ， 建筑与土木工程， 2012， 硕士

【摘要】 水是社会发展过程中是无可替代的重要资源之一，采用合理的手段有效的开发水资源，修建水电站是我国能源建设的一项重要措施，为适应国际社会的减排的需要，缓解环境压力，作为清洁环保、无污染的能源水电必然会大有发展前景。作为典型应用的河床贯流式水电站坐落于河床基础上，不同电站基础不同，地质参数差异大，因此研究特定基础上的河床式厂房的整体稳定是必要的。河床贯流式电站与一般的工民建厂房不同，厂房坝段作为挡水坝段的一部分，同时承受上、下游水推力的作用，内力分布较为复杂。而且河床贯流式电站内部结构上部为框架结构，下部结构，形状不规则，孔洞开口及截面尺寸较大，因此全面了解厂房坝段在静、动力条件下的应力情况，对厂房结构进行三维有限元静、动力研究计算具有重要的意义。本文以某贯流式水电站河床式厂房作为研究对象,分别采用简化方法对电站进行了整体稳定分析，利用Ansys软件对电站厂房进行了静、动力三维有限元研究计算。研究结果表明厂房整体稳定的主要影响因素为坝段底宽、上下游水位差、上下游水头高度以及采用帷幕灌浆可以有效的提高抗滑及抗浮安全系数。水电站三维有限元静、动力分析结果表明：在地震工况即动力工况下，混凝土结构应力相对于静力工况是有增大的趋势，应力较大部位发生在受力较大的管型座周边或跨度较大的流道周边，混凝土局部产生的较大的拉应力可通过配筋来解决。在电站体型设计时尽量减少体型突变，选用弧段过渡，场内设备尽量均匀布置，对避免应力集中，减少钢筋浪费是非常有效的措施。在该工程的初步设计阶段，进行体型设计时应用了本文的研究结果。在同类的水电站厂房结构设计过程中可以参考应用。更多还原

【Abstract】 Water is one of the important and irreplaceable resources in the social developmentprocess. It is strategic initiative of China’s energy development to take reasonable andeffective means to make rational exploration and utilization of hydropower resources and tomake construction of hydroelectric power projects. In order to meet the international need toreduce emission and ease the pressure on the environment, the hydropower which is clean,eco-friendly, pollution-free is bound to be quite promising.The riverbed bulb turbine hydropower station as a typical application is located on thebasis of the riverbed. The power stations differ in the basis and their geological parametersvary from one to another. Therefore it is necessary to study the overall stability of theriverbed plant on a particular basis. The riverbed tubular power station is different from thegeneral civil engineering works. The dam monolith of the plant as part of the water-barragesection is subject to the thrust of both the upstream and downstream. The internal forcedistribution is relatively complex. Moreover, the upper structure in the whole internalstructure of bulb turbine power station is frame structure and substructure, with irregularshapes and relatively large holes opening and sectional dimension. Therefore it is of greatsignificance to make computational study of static and dynamic three-dimensional finiteelement after having a comprehensive understanding of the internal stress in static anddynamic conditions of the dam monolith of the plantThis thesis takes bulb turbine hydropower station of one riverbed as the research subjectand respectively makes use of the simplified methods to make analysis of overall stability ofthe power station and of Ansys software to make static and dynamic three-dimensional finiteelement calculation of power plant. The research results show that the overall stability of theplant is mainly influenced by the dam monolith width at the bottom, water level differenceand water head height of the upstream and downstream as well as curtain grouting which caneffectively improve the security coefficient of skid resistance and anti-floating. The results ofthe hydropower’s static and dynamic three-dimensional finite element analysis indicates thatunder seismic operating conditions, namely, power conditions, compared with the staticoperating conditions, there is an increasing trend for the stress of concrete structure. Thebigger stress positions are peripheral to the tube type seat or flow channels with a larger span.The problem of larger tensile stress in the internal concrete structure can be solved withreinforcing bars. They are very effective measures to minimize the shape mutation in designof the power station, select arc transition and make layout of the inside equipments aswell-distributed as possible to avoid stress concentration and reduce the waste of reinforcingbars.Ln the initial design period of the project, the research achievement of the thesis is applied for the shape design.And it can be taken as reference for the hydropower house constructiondesign of this kind.更多还原