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前言吊车梁是工业厂房中主要的承重构件,需用数量很多。它主要承受桥式吊车的垂直动力荷载与横向制动荷载。近年来我国已大量采用预应力混凝土吊车梁如起重量75t以下吊车的预应力混凝土吊车梁已经普遍采用,然而100t以上吊车的吊车梁仍然采用钢结构。钢制吊车梁的用钢量很大,为了节约钢材,满足建设需要,用预应力混凝土吊车梁代替重吨位的钢吊车梁,已成为一件极待解决的问题。
Preface Crane beam is the main load-bearing components in industrial plants, the need to use a large number. It mainly suits the vertical dynamic load and lateral brake load of the bridge crane. In recent years, prestressed concrete crane girders, such as prestressed concrete crane girders, which have been widely used in our country, such as prestressed concrete crane girders with a lifting capacity below 75t, have been widely used. However, the crane girders above 100t are still constructed of steel. Steel crane beam with a large amount of steel, steel in order to save and meet the construction needs, with prestressed concrete crane beam instead of heavy steel crane beam, has become a problem to be solved.