论文部分内容阅读
通过对连续箱梁桥内力增大系数计算原理的简述,提出一种利用空间有限元分析软件计算连续箱梁桥内力增大系数的新途径,建立连续箱梁三维梁单元模型,在主跨跨中分别施加集中力和集中扭矩,求得主跨跨中的垂直挠度及扭转角,即可求算连续梁中任意一跨的增大系数。最后利用空间板壳有限元模型进行空间受力分析,结果表明该方法的实施过程简单,计算结果精度高。
Based on the brief description of the calculation principle of the internal force increasing coefficient of continuous box girder bridge, a new way to calculate the internal force increasing coefficient of continuous box girder bridge by using the space finite element analysis software is proposed. The three-dimensional beam element model of continuous box girder is established. By applying concentrated force and concentrated torque respectively in the span and obtaining the vertical deflection and torsion angle in the main span, the augment coefficient of any span in the continuous beam can be calculated. Finally, the finite element model of the space plate shell was used to analyze the force in the space. The results show that the method is simple and the calculation accuracy is high.