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曲杆单元法将拱坝分离成空间刚架结构,将曲杆作为计算基本单元。通过单元及荷载分析,得出结构的总体刚度方程,并提出了求解应力的方法。计算考虑了影响拱坝结构作用的各种主要因素,包括五个结点位移分量。地基变形按F.vot方法计算,并用对角元叠加法进行支座处理。同时考虑了温度变形及泊桑比的影响。计算程序对计算机内存数量要求不高,文中给出了计算实例,并与现在使用的程序的计算结果进行了对比、分析。
The curved rod element method divides the arch dam into a space rigid frame structure, and takes the curved rod as the basic unit for calculation. Through the unit and load analysis, the overall stiffness equation of the structure is obtained, and the method to solve the stress is proposed. The calculation takes into account various major factors that affect the arch dam structure, including five node displacement components. The foundation deformation is calculated by F.vot method and supported by diagonal element superposition method. At the same time, the effects of temperature deformation and Poisson’s ratio are considered. The calculation program does not have high requirement on the amount of computer memory. The calculation example is given in this paper and compared with the calculation result of the program now used.