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.
根据瑞利—李滋法，对先张法预应力吊车梁首次提出了预应力水平拉杆作用效应增量的计算公式。
Base on Rayleigh-Ritz method, a calculation formulation of action effect increment of a prestressed horizontal tension rod is firstly presented.
先张法预应力空心板梁在冬季施工过程中，易产生裂缝。
It is easy to bring crack that pretensioned prestressed hollow slab beam is constructed in winter.
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