Trusses in truss structures (Truss structure) refer to truss girders, which are lattice structures. Truss structures are often used in public buildings such as large-span buildings, exhibition halls, gymnasiums and bridges. Trusses are often referred to as roof trusses as most of the building's roof structures are used.
Main structural characteristics of cross
The stress of each bar is mainly by one-way pulling and pressing, which can be adapted to the distribution of the bending moment and shearing force inside the structure through the reasonable arrangement of the upper and lower chord and the abdominal rod. The horizontal force of tension and pressure realizes its own balance, and the whole structure does not produce horizontal thrust on the bearing. Flexible structure, wide range of application. Compared with the truss girder and the real abdomen beam (i.e., the beam which we generally see), in the aspect of bending, because the section of tension and compression is arranged in the upper and lower ends, the internal force arm is enlarged, so that the flexural strength is achieved with the same material dosage. In the aspect of shearing, the shearing force can be transferred gradually to the support by arranging the abdominal rod rationally. In this way, both bending and shearing resistance, truss structure can make the strength of the material to be fully played, thus applicable to a variety of span of construction roof structure. The more important point is that it transforms the complex stress state of the real abdomen beam under the transverse bending into a simple tensile stress state in the truss member, so that we can intuitively understand the distribution and transmission of the force and facilitate the change and combination of the structure.