Study of behavior of flexible rods as a part of the steel and concrete composite cable space frame

Authors

  • G. M. Gasii Cand. Sc. (Tech.), Associate Professor, Ukraine

Keywords:

structure, steel and concrete composite construction, roof, stress-strain state, module, flexible rod

Abstract

Abstract. Purpose. Steel and concrete composite cable space frame is double-layer roof system, consisting of spatial modules, connected to each other via bolted joints. The shaping of the structure is made through the flexible elements of the bottom chord, which are manufactured as cables. Taking into account the fact that the steel and concrete composite cable space frame is a completely new type of structure with the original design, then the investigation of the stress-strain state of individual elements of the structure is a pressing issue. Therefore, the purpose of the work is to determine the specifics of the behavior and study the stressstrain state of flexible rod elements of the bottom chord that are a part of the new steel and concrete composite cable space frame assembled from the spatial modules via bolted joints. Methodology. To design and produce an experimental full-size sample of the steel and concrete composite cable space frame. Experimentally determine the specifics of the behavior and the nature of deformation of the flexible elements of the bottom chord of the new steel and concrete composite cable space frame under a uniformly distributed load. Measurement of deformations was carried out by using strain gauges. The location of the strain gauges was carried out in the most characteristic sections of the investigated elements of the structure. According to the results of the experiment, the conclusion is drawn about the effectiveness of the constructive solution of the designed structure and the accepted method of ensuring the joint operation of the components of the structure. The obtained experimental data are compared with the results of theoretical investigations. . Findings. The efficiency of the constructive solution and the adopted method for ensuring the joint operation of the components of the structure was confirmed. The peculiarities of the operation of flexible elements of the bottom chord as part of the space structure are established. The dependence of deformation of the investigated elements on the level of loading was established. Originality. It is defined the stress-strain state of the flexible elements of the bottom chord of the new steel and concrete composite cable space frame. Practical value. Studying of the specifics of the operation and the stress-strain state of individual bearing elements of the structure enabled to confirm the effectiveness of the proposed constructive solution and the method of ensuring the joint operation of the modular elements. That, in turn gives impetus to the further solving the general issue and overcoming the obstacle to the introduction of new structure into the construction practice.

Author Biography

G. M. Gasii, Cand. Sc. (Tech.), Associate Professor

Department of Structures from Metal, Wood and Plastics, Poltava National Technical Yuri Kondratyuk University, 24, Pershotravnevyi avenue, Poltava 36011, Ukraine

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Published

2017-08-30

Issue

Section

Innovative lifecycle technology of housing and civil, industrial and transportation purposes