Calculation of spatial prestressed combined composite trussing constructions

Purpose. Based on widely used of composite construction in building, you should more study them strength and strain. For this produced three full-scale survey design, consisting of a metal trussing constructions and reinforced concrete slabs of different shapes. Methodology. Steel trussing design is a combined beam with a hard top and a belt suspension. After a set of concrete strength is composite section that leads to change the position of the neutral axis. In the design is the ability to achieve redistribution efforts in the design by getting points on poles reverse and reduce the maximum stress in the upper sections of the belt construction. For the perception of negative moments in expected additional reinforcement plate in the upper zone. To determine the actual strength characteristics of the materials tested additional samples of concrete blocks and valves. When loading experimental models used sandbags for even distribution of the applied force. Step 3 downloads adopted kN/m2, the maximum load was 21 kN/m2. One load was monitored application is applied non-symmetric. Equability controlled by dynamometers mounted on supports. Findings. Realized comparison value of strain, stress and deformation experimental with theoretical, which were calculated according to current regulations in Ukraine documents. Reported high convergence results for the full-scale structures. Deviationsfrom theoretical experimental variables was -12.2 ...-1.1 %. Originality. Made experimental study of three dimensional models of field composite trussing constructions with different types of boards: the usual flat shield on a metal mold and profiled decking along and across the main structures. Combining the joint operation was carried out in flexible metal anchor loop type. The calculation was carried out on samples developed technique for spatial cross-ridge system. Practical value. Using of composite overlapping structures in construction will reduce a lot of elements compared to metal or reinforced concrete, thereby reducing costs.