Abstract
Paper deals with a new constructive solution of a massive concrete pillar intended, mostly, for construction of railway and road bridge supports and with procedure of rationalization of its parameters. Statement and solution of the problem of strength and stability of a concrete support, which has an external mesh cage, reinforcing rings (frames) and an internal cavity is considered. The contact stresses between the concrete core and the metal cage are determined, which, in turn, depend on the attributes of the cage and the frames. The rationalization criterion based on minimizing the potential energy of deformation is introduced. For the indicated task, the variables are the thickness of the mesh cage, the size of its cell, the step and the cross-section of the frames. Support with rational parameters which depend on characteristics of cage and frames gives the lowest material consumption and the highest bearing capacity that is the aim of the approach of investigation.
Highlights
Developing the idea of a concrete support with external reinforcement, presented in [1], this paper proposes the detail approach to the rationalization of its parameters
The effectiveness of external reinforcement made of expanded metal sheet can be extremely increased in case of using the additional transverse steel rings
One can see the interest in the task of finding the rational dependency between parameters of the mesh cage and reinforcing rings
Summary
Developing the idea of a concrete support with external reinforcement, presented in [1], this paper proposes the detail approach to the rationalization of its parameters. The effectiveness of external reinforcement made of expanded metal sheet can be extremely increased in case of using the additional transverse steel rings. One can see the interest in the task of finding the rational dependency between parameters of the mesh cage and reinforcing rings. Together with mentioned above, the task of this work is to establish the bond between the value of the potential energy of deformations (PED) and characteristics of external reinforcement (the cage and the frames at one time) and, using the energy approach [2], to find out the decision which gives minimum value of PED
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