Bearing capacity of building structures reinforced with composite materials

Abstract

Methods for strengthening building structures with composite materials are considered. The reduced characteristics of a multilayer composite material are determined depending on the orientation of the layers. The criteria for the destruction of a multilayer composite material used in many areas, including construction, are considered. Unlike a homogeneous material, the bearing capacity of which is determined by the ratio of the allowable stress to the effective stress in the elements of the building and structure. The failure criteria for a multilayer composite material is defined as the ratio of the effective stress to the allowable stress. At present, many criteria for the destruction of multilayer materials have been developed and tested. In the developed criteria, exceeding the permissible strength characteristics in one of the layers of the multilayer material leads to the destruction of the multilayer material as a whole. An example of calculation of a multilayer composite material is given. As a result, the layer, type, direction of load, and failure criterion are determined, which lead to the destruction of the multilayer composite material. In this study, cases of reinforced concrete structures reinforcement with composite sheets to increase strength and reinforcement of building materials from lightweight concrete subjected to bending loads are considered. An analysis of the results obtained is carried ou.

Keywords

• modeling
• composite materials
• finite element method
• failure criteria
• stress-strain state