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Abstract
In this article, a new method of increasing the efficiency of combined steel roof trusses is proposed and considered. A rational shape of the steel roof truss, including its topology and rational geometric parameters, was obtained, but without obtaining a rational SSS. A proposed method provides the adjustment of SSS in the truss by changing the upper belt panel length. On the basis of the obtained rational SSS of the combined truss, a new structural form is proposed. It is shown that thanks to the proposed method, it is possible to obtain a more efficient design by 18-32%, compared to typical ones. The diagram of the moments in the stiffness beam of the reference truss and the truss with SSS regulation is given. Further directions of research are determined, in particular, the development or improvement of rational structural forms and the use of calculation method of regulation of SSS in the stiffness beam of the steel combined truss.
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