The analytical method of system of plane intercrossing forces is to calculate unknown forces by use of equilibrium equation of plane system of plane intercrossing forces.
平面汇交力系的解析法是用平面汇交力系的平衡方程计算未知力，其平衡方程最简单，但也最容易出错。
This method is based upon the equilibrium of forces under ultimate loading, and consequently the effect of plasticity of the material is included in consideration.
这个公式是考虑板在极限平衡状态，考虑了材料的塑性。
The derivation is based on the equilibrium of the vertical forces on the slab. The common method of beam on elastic foundation for the integral base is critcized and the improved method is presented.
在此基础上，对水闸整体式平底板现行的弹性地基梁方法进行了分析，同时对此法提出改进。
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