介绍了网架结构在使用过程中出现异常变形后的现场检测内容,分析思路和鉴定评价的工作程序,以及每项工作的重要性。并以一个筒仓网架结构出现部分杆件异常弯曲后,对其进行检测鉴定的工作为例,详细阐述了整个检测鉴定工作中的每个环节。 This paper introduces the on-the-spot inspection contents after the abnormal deformation of the grid structure in the course of using, the working procedure of analyzing ideas, appraising and evaluating, and the importance of each work. After the abnormal bending of some bars in the structure of a silo grid, the work of testing and appraisal of the structure is taken as an example to elaborate the whole process of testing and identification.