PRINCIPIAL PROBLEMS IN THEORY OF CREEP AND STRENGTH CONNECTED WITH CALCULATION OF CONCRETE STRUCTURES

Abstract

The aim is to solve the actual general problems for calculation of the structures taking linear and non-linear creep, ageing, short-term and long-term strength of the concrete into consideration. The gradient criterion of the brittle failure being single for regular and singular points has been proposed. The rheological model of the ageing concrete enabled to interpret in a new way the Maslov - Arutyunyan equation has been introduced into consideration. The "natural"-integrated transformation in the equations of the linear creep theory as a tool of transfer to the elasticity theory has been shown. The Volterra's principle has been spreaded to a case of the ageing medium. The linear theory of the grown body creep has been developed. The medium with overgrowing pores has been considered that enables to obtain the description of the hydrated concrete ageing and calculation tooling of the early loaded concrete structures. The united theory of the non-linear creep and long-term strength of the ageing concrete has been constructed. For modelling of the concrete thermocreep (vibrocreep) the rheological model the bond number of which depends upon the temperature (amplitude of vibration loading) has been proposed. The structural theory of concrete creep and shrinkage revealing the role of the film and capillary water has been constructed.Available from VNTIC / VNTIC - Scientific & Technical Information Centre of RussiaSIGLERURussian Federatio