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夹合木拱支架是一种新颖的结构型式,较之一般习用的拱架在设计方面具有一系列显著的特点,考虑合理的筑拱方法可以得到最经济的拱架设计。本文为确定最有利的分段筑拱程序绘制了设计须用的拱力和挠度影响线,并分别制表列出在各次筑拱过程中拱架几个控制截面拱力和挠度的变化及设计拱力和变形的数值,可供设计夾合木拱架时参考应用。对于拱跨及拱段数目不同的各种场合,采用了三铰、双铰和无铰式样的拱架结构,并以所有可能的分段筑拱方案进行拱架拱力与挠度设计数值的分析比较,最后选定出最合理的筑拱程序。本文考虑的分析方法如稍加变通,将不仅适用于现浇的钢筋混凝土拱跨,亦可推广在预制装配式混凝土拱砌块和大跨度石拱中应用。在计算中建议了利用拱力影响值以推算拱弧挠度的方法,因而比较简便地绘制了无铰拱拱顶及拱跨四分点截面的挠度影响线。
Closure wood arch bracket is a novel structure, compared with the conventional customary design has a series of significant features, consider the reasonable method of arch construction can be the most economical arch design. In order to determine the most favorable sub-arch-building procedures, the paper draws the lines of influence of the deflection and the force required for the design, and separately tabulates the changes of the arch-strength and the deflection of several control sections of the arches during each building process. The design of the value of the amount of deformation and deformation, for the design of wooden arch frame reference application. For different occasions with different arch span and arch length, three-hinged, double-hinged and hingeless arch structures are adopted, and the numerical analysis of the arch design of arch and deflection is carried out with all possible arch-conceiving methods Comparison, the final selection of the most reasonable building arch procedure. The analysis methods considered in this paper, such as slight modification, will not only be applicable to cast-in-place reinforced concrete arch span, but also be applied to prefabricated concrete arch blocks and long-span stone arch. In the calculation, the method of using the influence of the arch force to calculate the arch deflection is proposed. Therefore, the deflection influence line of the archless arch and the arch span of the arch span is drawn relatively easily.