【摘要】 对张弦梁(桁架)结构的找形问题进行了深入研究,根据该类结构的受力特点,提出了分级卸载法,并应用于该类结构两端张拉施工过程的找形分析。该方法无需假定结构零状态几何,而可以一次得到对应于初状态(即预应力态)几何的结构施工放样尺寸(即零状态几何),并通过分级加载对该方法的精度进行了检验。更多还原

【Abstract】 The problem concerning form finding of the beam(truss)string structures is studied and the method named offloading by steps is put forward in accordance with the mechanical behavior of the structures.The method can be applied to the form finding of the beam string structures stretched at both ends.Without assuming the form of unstrained state,the form of unstrained state corresponding to that of pre-stressed state can be obtained through this method directly.Finally the method proposed is verified by the numerical solution of loading by steps.更多还原