Trusses facilitate structural changes and combinations

The truss in the truss structure refers to the truss beam, which is a latticed beam structure. Truss structures are often used in public buildings such as large-span workshops, exhibition halls, gymnasiums, and bridges. Trusses are also commonly referred to as roof trusses as they are mostly used in roof structures of buildings.

The stress of each member is mainly unidirectional tension and compression. Through the reasonable arrangement of the upper and lower chords and web members, the bending moment and shear force distribution inside the structure can be adapted. Since the internal forces of tension and pressure in the horizontal direction achieve self-balance, the whole structure does not generate horizontal thrust on the support. The structure is flexible and the application range is very wide. Compared with truss beams and solid web beams (that is, beams we generally see), in terms of bending resistance, due to the concentrated arrangement of the tension and compression sections at the upper and lower ends, the internal force arm is increased, so that with the same amount of material, Greater flexural strength is achieved. In terms of shear resistance, the shear force can be gradually transferred to the support by arranging the web rods reasonably. In this way, whether it is bending or shearing, the truss structure can give full play to the strength of the material, so it is suitable for building roof structures of various spans. The more important significance is that it converts the complex stress state inside the solid web beam under the action of transverse bending into the simple tensile and compressive stress state in the truss member, so that we can intuitively understand the distribution and transmission of force, which is convenient for structural Variations and combinations.