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本文采用四向调整拱梁分载法对拱坝应力进行了研究与公式推导,并编制了FORTRAN语言计算程序。该程序分别在VAX-8350计算机和IBM-XT微型计算机上进行了调试与计算,根据几个工程实例的计算比较,其成果符合一般规律。为节省计算机内存和提高计算速度,文中利用拱端反力系为基本未知量,从两岸逐梁递推,得出以拱端反力系线性表示的各条梁结点处拱的力学参数,然后在拱冠梁结点建立内力平衡和变位协调方程,从而可解出拱端反力系和拱冠梁结点处拱的分配荷载,再回代计算拱坝所有结点处拱的力学参数,最后用材料力学方法计算应力。
In this paper, four-way adjustable arch beam load-bearing method of arch dam stress was studied and formulaic deduction, and compiled FORTRAN language calculation program. The program was debugged and calculated on the VAX-8350 computer and the IBM-XT microcomputer respectively. According to the comparison and calculation of several engineering examples, the results are in accordance with the general rules. In order to save computer memory and increase computational speed, the paper takes the reaction force at the arch end as the basic unknowns, recursive from beam to beam on both sides of the cross, obtains the mechanical parameters of the arch at each node of the beam, Then, the internal force balance and displacement coordination equation are established at the crown of the arch crown so as to solve the distribution load of the arch at the junction of the reaction system at the arch end and the arch beam, and calculate the arch mechanics at all knots of the arch dam Parameters, and finally calculate the stress using material mechanics method.