利用BP人工神经网络确定主梁预拱度；
The construction camber for main beam can be determined by BP artificial neural network.
接着介绍了现浇梁支架的施工预拱度计算方法及设置方法。
Then calculating methods on construction camber of cast-in-place beam scaffold and setting methods are introduced.
讲述悬臂施工设置预拱度的原理，从而推导曲线桥悬浇施工时预留位移的一般计算公式。
Describe the principles of setting camber in the process of cantilever construction and deduce the general formulas for its calculation.
本文在对现行的基于相对挠度的预拱度计算设置方法进行分析后，进而提出了新的绝对挠度法。
The pace analyzes the current pre-arched calculation and installation method based on the relative deflections, and proposes a new absolute deflection method.
通过对先张法预应力梁板预拱度产生的过程进行分析，揭示预应力梁板预拱度产生的内在原因。
The paper analyses the formation process for pretensioning prestressed hollow plank precamber, announces inside reason for prestressed hollow plank precamber to public.
本文论述起重机主梁的上拱度及预拱曲线的基本原理，介绍了国内外起重机技术标准中规定的上拱度值。
This paper discusses the question of crane main girder camber and the pre-cambering curve, introducing camber values stipulated in related crane standards in China and abroad.
本文论述起重机主梁的上拱度及预拱曲线的基本原理，介绍了国内外起重机技术标准中规定的上拱度值。
This paper discusses the question of crane main girder camber and the pre-cambering curve, introducing camber values stipulated in related crane standards in China and abroad.
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