斜交角变化对斜交弯梁桥结构内力影响的计算分析

摘要

The computer program of ANSYS is used to simulate the structure of the skewed bridge by takeing a skewed bending bridge as the engineering background.By the analysis of finite element method and parameter variation process, the effect of bevel angle variation is calculated and analyzed for 15° ,30° ,45°and 60°on internal force of key positions of a skewed bending bridge at side span support position, pier top and mid-span, respectively under the constant and prestressing load.It is verified that the plate element finite element method is reasonable for the internal force calculation of skewed bending bridge, which provides reference for engineering design and construction.%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斜交角,即15°,30°,45°和60°,对斜交弯梁桥结构的边跨支撑、墩顶及跨中等关键位置产生的内力影响,对比随斜交角的变化,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素法的合理性,供工程设计及施工部门参考.