预应力混凝土斜交空心板正截面强度计算研究

Calculation and Research of Normal Section Strength of Prestressed Concrete Skew Hollow Slab

采用有限元方法对预应力混凝土斜交空心板进行非线性全过程仿真计算分析。通过多种工况的计算比较发现,达到极限状态时截面的破坏形式、极限承载力随荷载形式不同有一些差别,并得出预应力混凝土斜交空心板的最小的荷载工况,在此基础上,提出了预应力混凝土斜交空心板正截面强度计算公式,可供工程设计参考使用。

The finite element method is used to conduct the non-linear full-p computation and analysis of prestressed concrete skew hollow slab, Through roeess simulation computation and comparison of various load cases, it is found that the failure modes and ultimate load-carrying capacity of the section of the skew hollow slab have some differences with variation of different load cases when the slab just reaches the ultimate state of the applied load and the minimum load case for the hollow slab is obtained. Based on the results of the computation and analysis as mentioned, the formulas for computing the normal section strength of the hollow slab are put forward and the formulas may serve as reference to the engineering design.