Strength Evaluation of Jreel Members Using Tapered Plates And It's Design Method

锥形板（纵向压型板）在轧制方向上连续变化其厚度，并在没有对接焊接过程的情况下提供变截面的梁。因此，在公路钢桥设计导则中建议采用楔形板翼缘是钢桥合理设计的有效手段之一，工字形截面梁的楔形板翼缘可以模拟为荷载边应力比为常数的突出楔形板。为了保持这种应力状态，考虑了附加剪切变形和剪切应力与板的厚度比、应力比和高宽比的关系，本文提出了受压突出楔形板的解析算法，并讨论了极限强度的计算结果和上述比值对强度的影响。提出了任意应力状态下加筋锥板受压问题的解析计算方法，以及对带调整壁板的加筋锥板产生轴向应力的控制方法。利用弹塑性有限位移分析程序，对采用新算法和控制方法的加筋楔形板进行了极限强度分析。在此基础上，对加筋锥板的极限强度和特性进行了讨论，并提出了新的设计方法。

Tapered plate (longitudinally profiled plate) is continuously varying its thickness in rolled direction and gives variable cross-section of girder without butt welding process. So using of tapered plate flanges is seemed one of effective means on the rational design of steel bridges suggested in the Design Guideline for the Steel Highway Bridges.Tapered plate flanges of I-section girder can be modeled as the outstanding tapered plate of that the stress ratio between both loading edges is defined constant. To keep this stress condition, the additional shear deformation and shear stress with some relations to the thickness ratio, stress ratio and aspect ratio of the panel are considered.In this report, the analytical algorithm for outstanding tapered plates in compression is suggested and the results of the ultimate strength and effectc of above ratios to the strength are discussed.Furthermore, the analytical algorithm for the stiffened tapered plates in compression in arbitrary stress states and the control method are suggested producing axial stress to stiffened tapered plates with adjustment panels. The ultimate strength analysis of the stiffening tapered plates with new algorithm and control method is carried out using elasto-plastic finite displacement analysis program. Consequently the results of the ultimate strength and characteristics of stiffened tapered plate are discussed and the new design method are suggested.