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本文用以有限条和力法为基础的数值法分析连续箱梁曲桥,采用两节线的低阶有限曲条和三节线的高阶有限曲条建立方程。作为实例,给出两座连续箱梁曲桥的分析,并将两种曲条法得出的结果同有限直条法的结果进行了比较。表明,曲条法可以用来处理箱梁直桥;而用直条法处理曲桥时,将低估桥内缘的应力和弯矩值。尽管高阶曲条法给出的条元界面的径向应力和弯矩一般较为平滑,但两种曲条法所得的全部结果都相互吻合良好。文中还讨论了模拟柱-隔板式支承系统的几种方法,表明,只要对支承截面中几个特定点的竖向位移加以约束,就足以模拟整个支承系统。
In this paper, the finite element method and the force method are used to analyze the continuous box girder curved bridge. The equations are established by using two-line finite-lower-order finite curl and high-order finite-three-element curvilinear. As an example, the analysis of the two curved bridges with continuous box girders is given. The results obtained by the two kink methods are compared with those of the finite kink method. It shows that the kriging method can be used to deal with the straight beam of box girder. When the curved bridge is treated with straight strip method, the stress and moment of bridge inner edge will be underestimated. Although the radial stress and bending moment at the interface of bar element given by the high-order bar method are generally smooth, all the results obtained by the two kinds of bar method agree well with each other. Several methods of simulating a column-baffle support system are also discussed in this paper, which show that it is sufficient to simulate the entire support system by constraining the vertical displacement of several specific points in the bearing section.