Considered the geometric and material non-linearity , this article analyzed some factors which influence the ultimate bearing capacity of welded I-section with S-shape curved beam , such as point of knee bend、central angle、ratio of width-thickness of web and ratio of width-thickness of flange.

To find out the laws of how the elastic and plastic mechanical behavior for prestressed concrete curved continuous beams are influenced by central angle,a series of prestressed concrete curved continuous beams are simulated based on the theory and the program of prestressed concrete curved beams.

Methods: IOP on central cornea,limbus and sclera of 61 cases(99 eyes) were measured by Tono-Pen applanation tonometer.

From the results of FEM,the tensile stress in the center of disk decreases with the central angle of the flats,and the ratio of compressive stress to tensile stress increases as well.

2 in Xiangtan Iron and Steel Company,the values of the Peripheral angle and central angle of burden profile calculated in our mathematical model are in agreement with the actal measured values.