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钢-混凝土组合梁是在钢结构和混凝土结构基础上发展起来的一种新型梁,通常其肋部采用钢梁,翼板采用混凝土板,两者间用抗剪连接件连成整体。由于钢材的抗拉性能较好但受压稳定性较差,混凝土的抗压性能较好而受拉性能很差,2种结构的组合可以更好地发挥各自的性能,使组合结构的承载能力更高。钢与混凝土两者之间必须有牢固的粘结,来保证组合结构的特性。近年来的应用实践表明,该类结构将成为我国结构体系的重要发展方向之一。
Steel-concrete composite beam is a new type of beam developed on the basis of steel structure and concrete structure. Usually the steel beam is used for the rib and the concrete plate is used for the wing. The two are integrated by the shear connector. Due to the good tensile properties of steel but poor compression stability, concrete compression performance is better and poor tensile performance, the combination of two structures can better play their respective performance, so that the carrying capacity of the composite structure higher. There must be a strong bond between the steel and the concrete to ensure the characteristics of the composite structure. The application practice in recent years shows that such structures will become one of the important development directions of China’s structural system.