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针对平面形状不规则的异形桥梁，采用样条子域法对之进行数值分析。将异形桥梁进行结构离散，得到具有曲线边界的任意四边形子域，采用映射的方法，将其变换成规则矩形子域。然后采用二维样条函数构造其位移模式，利用最小势能原理获得问题的解答。
Aiming at the irregular shaped bridge with irregular plane shape, the spline subdomain method is used to conduct numerical analysis. Discrete structures of heterogeneous bridges are used to obtain arbitrary quadrilateral subdomains with curved boundaries, and then transformed into regular rectangular subdomains using the mapping method. Then two-dimensional spline function is used to construct the displacement mode and the solution of the problem is obtained by using the principle of minimum potential energy.