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研究了用模型作为斜垃桥设计与分析的一种直接辅助工具。考虑了斜垃桥由于位移大及弯矩—轴向力的相互作用而显示出非线性的性能。为了计算在恒载和活载下的应力及位移,模型分析是分两阶段进行的。第一阶段假定结构是线性状态的。第二阶段将以线性状态为基础所求得的数据,考虑斜粒桥体系的非线性性能进行调整。为了用后张钢索来减小恒载应力和位移,建立了一个程序来确定为获得规定的折减所需的后张力。将模型研究结果所得的试验数据与用CDC3300数字计算机所得的理论分析进行了比较。
The model is used as a direct auxiliary tool for the design and analysis of inclined bridges. Considered the oblique rubble bridge because of displacement and bending moment - axial force interaction shows nonlinear performance. In order to calculate the stress and displacement under dead load and live load, the model analysis is carried out in two stages. The first stage assumes that the structure is linear. The second stage will be based on the linear state of the data obtained, considering the nonlinear properties of the system of inclined-angle bridge to be adjusted. In order to reduce the constant-load stress and displacement with post-tensioned wire, a procedure was established to determine the post-tension required to achieve the specified reduction. The experimental data obtained from the model studies were compared with the theoretical analysis obtained with a CDC3300 digital computer.