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.
在预应力加固设计方面，钢吊车梁与混凝土吊车梁不同，由于其刚度较小、挠度较大，当吊车荷载作用上去后，会引起水平拉杆作用效应增量。
The steel crane girder's rigidity is smaller and its deflection is larger, when the crane moves, there will be force increment in the prestressed horizontal tie.
校正定位模板的轴线、水平度和标高，用电焊固定在支架上，并焊上足够数量的支撑和拉杆。
Rectify the axis lines, levelness and elevation of the positioning form, fix it by electric welding on the bear frame and then weld sufficient supports and lifts.
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