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将对称平直线加腋梁简化为以横截面形心的连线为中性轴的空间曲杆,推导了其解析解。给出了这种加腋梁在均布荷载作用下的计算参考表格,并通过实例和三维有限元的数值解进行了对比,提出了对称平直线加腋梁解析解的修正方法。将对称平直线加腋梁和对称斜直线加腋梁进行了对比和分析,得出了一些有意义的结论。
The symmetrical straight line plus axillary beam is simplified to a space curved rod with the connection of the centroid of the cross section as a neutral axis, and its analytical solution is deduced. The calculation reference table of this kind of arched beams added with uniform load is given and compared with the numerical examples of the three dimensional finite element method. The correction method of symmetrical straight lines and axillary beam analytical solutions is proposed. The symmetrical straight line plus axillary and symmetrical oblique straight plus axillary beams were compared and analyzed, and reached some meaningful conclusions.