Abstract
The aim of this work is the development of a fragment of the structural covering, consisting of a triangular block of frames, the choice of step size (width) of the structural unit and a study of its mode of deformation by comparing experimental and theoretical results of research.
Highlights
In the design of a structural unit [1] a spatial 18х3 m triangular timber-metal block frame (18x3m TTMBF) (Fig. 1) is adopted [2, 3, 4] as a basis. It has synthesized the best properties of previously developed unit frames [5, 6]: the lower belt has a parabolic shape, the grid is spaced regularly along the length of the structure, efforts from the lower belt are transmitted to the panels of the top belt at a slight angle to the wood grains
Comparison of the structures was performed by the numerical method according to three indicators: 1) efforts in the upper belt; 2) efforts in the lower belt; 3) efforts in braces
In connection with the lowest deflections and efforts in the elements, it was decided to make a fragment of the structural block for further research, consisting of two unit frames with the dimensions of 18 x 6 m (18x6 m SSU-TTMBF) with a double belt
Summary
In the design of a structural unit [1] a spatial 18х3 m triangular timber-metal block frame (18x3m TTMBF) (Fig. 1) is adopted [2, 3, 4] as a basis. Geometrical scheme of the block frame is arranged in such a way that its joints are located on the arc of a square parabola, and interchangeable braces have the same length. This provides the most favorable conditions for the belts and grids.
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