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对于承受大吨位高轮压重级工作制吊车的吊车梁,按过去惯例,一般设计均采用铆接连接。国内截至目前为止,因受现有设计和施工技术经验不足的限制,象本例用于承受吊车起重量为140吨/30吨(重级工作制,最大轮压70吨)的吊车梁还很少有采用低合金钢焊接箱形形式的。而钢结构采用低合金钢焊接连接是当今的发展方向,本例是一次有意义的实践。本例已于1980年10月建成投产使用,目前未发现异常情况。但由于这方面已有的实例及参考资料不多,设计不尽合理,现将设计介绍如后,以供探讨。吊车梁的工作特点、设计特点
For crane beams that are subjected to large-tonnage high-wheel-weight heavy-duty cranes, according to past practice, riveting connections have been used for general designs. Domestic up to now, due to the limitations of existing design and construction technology, such as this example is used to withstand the crane crane capacity of 140 tons / 30 tons (heavy duty system, the maximum wheel pressure 70 tons) crane beam is still very Few low-alloy steel welding box forms are used. The use of low-alloy steel welded connections for steel structures is the current direction of development. This example is a meaningful exercise. This case was completed and put into operation in October 1980. No abnormalities have been found so far. However, due to the fact that there are not many examples and reference materials in this area and the design is not reasonable, the design will be introduced later for discussion. Crane work characteristics and design features