To do the calculations for the deflection and the flaw width of pre stressed concrete tower drum, the stiffness of the cross sections is essentially basic data.
在预应力混凝土塔筒的挠度和裂缝宽度计算中，截面的刚度是必不可少的基本资料。
After that, the calculation method about double pre-stressed composite structure's bearing capability and deflection are investigated, which provide the consults to future research and design works.
另外通过与常规预应力结构的比较，研究了二次预应力组合结构正截面承载能力和结构变形的计算方法，为今后的设计和研究提供了参考。
In recent years, remedy of main girder's downward deflection of OTC by pre-stress method has found wide spread application. This is also the common practice iu Wu Hun district.
用预应力法修理桥式起重机主梁下挠，近年来得到了广泛的应用，武汉地区应用亦较为普遍。
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