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一、前言拱坝是一种经济指标和安全指标均为较优的坝型,在水利工程中被广泛地采用。拱坝是一个变厚度、变曲率而边界条件又很复杂的空间壳体结构,影响坝体变位和应力的因素很多,要进行严格的理论计算是有困难的,通常不得不做一些必要的假定和简化。根据不同的计算思想和计算假定,有多种计算拱坝的方法,其中拱冠梁法是大型拱坝断面初选和中小型拱坝技术设计广泛采用的方法,并且还适用于方案比较和优化设计等。常用的拱冠
I. INTRODUCTION An arch dam is a type of dam with superior economic indicators and safety indicators. It is widely used in water conservancy projects. The arch dam is a space shell structure with variable thickness, variable curvature and complex boundary conditions. There are many factors that affect the displacement and stress of the dam. It is difficult to carry out strict theoretical calculations, and usually it is necessary to do some necessary Assumptions and simplifications. According to different calculation ideology and calculation assumptions, there are various methods for calculating arch dams, among which the arch crown beam method is widely adopted for the technical design of large-scale arch dam cross-section primary and medium and small arch dams, and is also suitable for program comparison and optimization. Design and so on. Common arch crown