论文部分内容阅读
一、引言蜗壳是水电站厂房水下结构的重要组成部分.钢筋混凝土蜗壳一般只用于水头低于30米的水电站中.若能将此限度提高,则在一定程度上可以节省钢材,并能减轻制造厂家的负担.但这需要考虑一系列的技术问题.而摸清其在主要荷载作用下的应力分布规律,则是首要的关键.同时,近来一般认为钢板与钢筋混凝土联合承载的蜗壳及装配式的预应力钢筋混凝土蜗壳比较经济,是今后的发展方向.为了探讨在更高的水头下使用这两种蜗壳的可能性,也有必要了解钢筋混凝土蜗壳的应力状态.本文仅就常见的大块厚壁梯形断面的钢筋混凝土蜗壳应力状态进行初步探讨.蜗壳是复杂的空间结构,现有的计算方法都较近似粗略,因而有必要通过试验研究,探索其结构特
I. INTRODUCTION The volute is an important part of the underwater structure of hydropower plant, and the reinforced concrete volute is generally only used in hydropower stations whose head is less than 30 meters. If this limit can be increased, the steel can be saved to a certain extent Can reduce the burden on the manufacturer, but this needs to consider a series of technical problems.And find out its stress distribution law under the main load is the primary key.At the same time, it is generally accepted that the combined load of steel plate and reinforced concrete Shell and prefabricated prestressed reinforced concrete volute more economical, is the future direction of development.In order to explore the possibility of using these two volutes at a higher head, it is also necessary to understand the stress state of the reinforced concrete volute. Only the common large-thick-walled trapezoidal cross-section of the reinforced concrete volute stress state is discussed volute is a complex spatial structure, the existing calculation methods are more approximate rough, it is necessary through experimental study to explore its structural characteristics