根据等效网格来模拟桥梁上部构造的梁格分析原理，对梁板式闭合环桥进行分析．为了验证梁格分析法的精确度及可行性，还进行了杆单元和三角形薄板弯曲单元组合的有限元分析，同时以福州市紫阳立交桥主结构为例．做了１∶４０比例的有机玻璃模拟试验．通过比较，三者数据吻合较好，说明梁格分析法分析此类梁板式闭合圆环桥是可行的 According to the equivalent grid to simulate the beam structure of the upper part of the bridge analysis principle, the beam plate closed ring bridge analysis. In order to verify the accuracy and feasibility of the beam analysis method, the finite element analysis of the combination of the bending elements of the rod element and the triangular thin plate is also carried out. At the same time, the main structure of Ziyang overpass in Fuzhou is taken as an example. Made a 1:40 ratio of plexiglass simulation test. By comparison, the data of the three agree well, which shows that it is feasible to analyze such beam-plate closed circular bridge by beam analysis method