New Effective Combined Steel Structures

Abstract

In the article, based on the generalization of the experience of adjusting efforts in steel combined structures, it is shown, that the most rational method of regulation is calculated in the design process. This method does not require any additional material costs. It is shown that the beam on elastic intermediate supports and solid extremes is a generalized type of all possible types of beams. It was emphasized that the problem of calculating building structures, including combined, first of all should be regarded as a problem of their rational design. The results of experimental studies of combined steel truss with calculated regulation in their internal efforts are presented. Experimental studies confirmed the hypothesis about the possibility of regulating the stress deformation state (SDS) in combined structures with resilient support - system of springs and achieving an equally stressed state in the calculated cross-sections. The sufficient consistency of the experiment results with theoretical calculations is shown and the efficiency of such systems compared with the typical reaches up to 27%. The proposed nomenclature series of effective new light, with a small number of elements trussed structures. Effective combined steel structures with rational geometric parameters and calculated value adjustments of SDS were used during the construction and reconstruction of many buildings:

Regulation of Stress-Deformed State in Compressed Elements of Steel Frames

“…Most of the disadvantages of the method of amplification of pre-stressed elements can be eliminated by rational redistribution (regulation) of the stress-deformed state(SDS) in reinforcement elements and reinforced construction rods (Gogol, 2018;Ghannam et al, 2016;Hohol et al, 2021).…”

Efficiency of Rational Combined Steel Trusses

“…These are statically determined and indeterminate trusses, as well as combined roof trusses. The use of such structures opens up wide opportunities for the creation of coatings that differ in lightness, high technical and economic indicators, and architectural expressiveness (Gogol, 2018;Gogol et al, 2018).…”

“…The modern level of production of rolled profiles makes it possible to produce such cross-sections of the rods of combined trusses that correspond to the work of the elements in compression, tension, bending, compression with bending . At the same time, the trusses provide the standard load-bearing capacity, are lighter and cheaper, and are competitive compared to foreign analogues Gogol, 2018;Panagiotis et al, 2002;Pichugin et al, 2013). These materials make it possible to increase spans, reducing the number of supporting columns and increasing architectural freedom.…”

“…The development of steel building structures (roof combined trusses) is connected with the task of increasing their efficiency by reducing mass and, therefore, reducing steel costs. Combined steel structures make it possible to reduce steel consumption by 21-27 % and the cost of their manufacture, which as a result gives a reduction in their actual cost by up to 31 %, compared to typical designs of similar spans (Cazacur et al, 2014;Gogol, 2018;Janušaitis et al, 2012).…”