The estimation of spatial cracks formation in reinforced concrete structures under the action torsion with bending

21st International Scientific Conference on Advanced in Civil Engineering "Construction - The Formation of Living Environment"

土木建筑工程

Dem'Yanov, A.I.^1 ; Salnikov, A.S.^2

Industrial and Civil Engineering Department, South-Western State University, Kursk

305040, Russia^1

Bryansk State Academy of Engineering and Technology, Bryansk

241037, Russia^2

关键词: Computational model;    Design modeling;    Forming loads;    Local stress;    Physical nonlinearity;    Spatial crack;    Transverse reinforcement;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/365/5/052019/pdf
DOI  :  10.1088/1757-899X/365/5/052019

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

It is proposed a computational model for the spatial cracks formation of the first, second and third types in reinforced concrete structures under the action torsion with bending, based on working assumptions and solving equations, with allowance for physical nonlinearity, deplaning cross sections, prestressing in the longitudinal and transverse reinforcement and the influence of the local stress field. Solving equations are constructed in a special way, so that their system does not become decaying for functions of many variables with the Lagrange multipliers use for finding the minimum generalized load corresponding to the spatial crack formation of the first, second and third types and the coordinates of their formation points. It is obtained experimental data for checking the proposed design model, including the values of the general crack-forming load, the coordinates of the points of crack formation along the axes (x; y, z); cracks and angles of their tilt; distance between cracks at different levels of cracking; the width of the opening of the spatial cracks along the entire helical-shaped line; angles of twisting, deflections, deformation of concrete and reinforcement.