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关于鋼桁梁平联与弦杆共同受力問題,已有四篇稿件討論,充分发揚了学术研究空气,欢迎这样的稿件。目前已可对交叉形平联的算式做出結論:沈永良同志提出了正确的推导过程,本文又提供了更接近实际的算法,两者都証明桥規所列交叉形平联受力的算式是正确的,只是精确度不同而已(邹守簡一文推論的山发点也是正确,只是錯在如同沈文中所指变形α_1α_2不能叠加。若将此点訂正也可推出桥規所列算式)。从本文数字算例可以看出差別并不很大,因此为了簡化计算,桥規所列算式似可保留不变。此外,关于三角形平联的受力情况还希望讀者继續討論。
There have been four manuscripts discussing the joint force of steel truss girders in parallel and chords, which has given full play to the academic research atmosphere and welcomed such manuscripts. At present, it is possible to conclude the formula of cross-shaped parallel connection: Comrade Shen Yongliang proposed the correct derivation process, and this paper provides a more realistic algorithm, both of which prove that the formula Correct, only the accuracy is different (Zou Shouwen deduced mountain point is correct, but wrong as Shen Wen refers to the deformation α_1α_2 can not be superimposed. If this point can also be amended to introduce bridge formula). It can be seen from the numerical examples in this article that the differences are not significant, so the formulas listed in the bridge rules may remain unchanged in order to simplify the calculation. In addition, the triangular parallel force situation also hope that readers continue to discuss.