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在对我国许多港口的门座起重机作了大量的调查研究之后，对起重机金属结构的故障进行了讨论．将起重机金属结构故障分为四种，给出了起重机结构故障及其发生部位的分布情况．并对其中一种结构的故障进行了分析．对起重机金属结构故障分布的研究是开展起重机金属结构状态监测的第一步．
After a great deal of investigation and study on the portal crane of many ports in China, the failure of the crane metal structure was discussed. Crane metal structure will be divided into four types of fault, given the structural failure of the crane and the distribution of its location. The failure of one of the structures was analyzed. Research on the distribution of crane’s metal structure failure is the first step to monitor the status of crane’s metal structure.