Calculation of load-bearing capacity of prestressed reinforced concrete trusses by the finite element method

Energy Management of Municipal Transportation Facilities and Transport - EMMFT 2017

Agapov, Vladimir^1 ; Golovanov, Roman^1 ; Aidemirov, Kurban^2

Moscow State University of Civil Engineering, Yaroslavskoye Shosse, 26, Moscow, Russia^1

Daghestan State Technical University, 70, I. Shamil Ave, Makhachkala

367015, Russia^2

关键词: Basic design equations;    Geometrical and physical nonlinearities;    Geometrical non-linearity;    Load-bearing capacity;    Non-prestressed reinforcement;    Nonlinear deformations;    Pre-stressed;    Prestressed reinforced;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/90/1/012018/pdf
DOI  :  10.1088/1755-1315/90/1/012018

来源: IOP

【 摘 要 】

The technique of calculation of prestressed reinforced concrete trusses with taking into account geometrical and physical nonlinearity is considered. As a tool for solving the problem, the finite element method has been chosen. Basic design equations and methods for their solution are given. It is assumed that there are both a prestressed and nonprestressed reinforcement in the bars of the trusses. The prestress is modeled by setting the temperature effect on the reinforcement. The ways of taking into account the physical and geometrical nonlinearity for bars of reinforced concrete trusses are considered. An example of the analysis of a flat truss is given and the behavior of the truss on various stages of its loading up to destruction is analyzed. A program for the analysis of flat and spatial concrete trusses taking into account the nonlinear deformation is developed. The program is adapted to the computational complex PRINS. As a part of this complex it is available to a wide range of engineering, scientific and technical workers.