马迹塘公路桥为23孔等跨装配式简支旧梁桥。基于三维实体元建立其中1孔的三维有限元精细模型,计算该孔的动力特性。并根据全部23孔桥垮的动力特性测试结果,选择其中2孔桥垮进行静力荷载试验。文章在理论计算的基础上,对2孔桥垮的静力测试成果进行对比,深入探讨各片主梁之间的空间受力行为。 Malu Tang Highway Bridge is 23 holes and other cross-type simply supported by the old beam bridge. The three-dimensional finite element model of one hole was established based on the three-dimensional solid element, and the dynamic characteristics of the hole were calculated. According to the test results of the dynamic characteristics of all 23 bridges, the 2-hole bridge was selected for static load test. On the basis of theoretical calculation, the article compares the static test results of 2-hole bridge collapse and deeply discusses the space force behavior between the main girders.