Ways to Improve the Combined Steel Structures of Coatings

To increase the efficiency of traditional beam steel structures, more extensive use of combined steel structures is required. When using combined steel structures, it is possible to use a calculated method of regulating their stress deformation state (SDS). This method is easy to implement and low in complexity, and does not require complexity of structures. Analysis of the structural form development and the methods of calculating combined steel structures demonstrated that such structures are the most promising and have great potential. The most rational constructive form is the truss with support units at upper belt level and lower tightening. Numerical and analytical calculations showed, that while working in the elastic-plastic area and taking into account its own weight ensures a load capacity increase only for scheme (b) up to 20%, and scheme (a) is better for increasing the rigidity of the structure also when working in a critical area. Based on the principle of minimizing the plot area of moments, an improved design of a steel-combined truss is proposed. We have developed a constructive solution for a combined rational steel rafter truss, the number of nodes and elements being reduced several times.