以一座斜交弯梁桥为工程背景,利用Ansys软件建立该桥计算模型.采用结构有限元计算方法,运用参数变异法,计算在恒载和预应力作用下不同曲率半径,即200,250,300,400,450,800,1000m,对斜交弯梁桥结构的边跨支撑、墩项及跨中等关键位置产生的内力影响,对比随曲率半径的变化,分析引起关键位置内力变化的规律及成因,验证了连续斜交弯梁桥空间力学分析采用板单元有限元法的合理性,供工程设计及施工部门参考.%The computer program of Ansys is used to simulate the structure of the skewed bridge by taking a skewed bending bridge as the engineering background. The internal force of curvature radius variation (that is 200,250,300,400,450,800 and 1 000 m) on key positions of side span support,pier top and mid-span of a skewed bending bridge is calculated under the in fluence of dead load and prestress by using the finite element method and parameter variation method. The variation with the curvature radius is compared,and the rules and causes which lead to the variation of internal force are analyzed, thus to verify the rationality of spacial dynamic analysis of the continuous skewed bending bridge by using the plate unit finite element method and to privide the reference for engineering design and construction.
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