一、断裂破坏实例及其主要原因起重机桥架断裂破坏事故早有发生。根据M.M.戈赫别尔格提供的资料,苏联在三十至五十年代有一些桥式起重机发生了局部或总体破坏。其中有的仅用二至三年,桥架折断、小车坠落、完全破坏。从起重机类型特性、结构特点、损坏特征、使用情况以及损坏前的使用时间等,可 First, the failure of the example of failure and its main reason crane bridge fracture failure occurred. According to information provided by M.M. Gohbakhl, some of the overhead cranes in the Soviet Union were partially or totally destroyed in the 1930s and ’50s. Some of them only two to three years, the bridge broken, the car crashed completely destroyed. From the type of crane characteristics, structural characteristics, damage characteristics, usage and damage before the use of time, etc.