Method for Investigation of Structures for Temperature Effects

Abstract

In this paper we consider the developed method which, in the presence of the appropriate indicated types of collateral, is an effective technology for performance of investigations of structures exposed to virtual temperature fields. Its distinctive features are the simplicity of experimental part, the low cost of actual experiment, the physical clarity and logical foundation of results being obtained. In the theoretical bases of the method there is the energy principle of Betty-Maxwell reciprocity of works. It was shown that thermal displacement of the element (structure) in a predetermined direction and at a given time depends on the modulus of deformation of the 1st kind E, coefficient of transverse deformations v, the thermal expansion coefficient α and the 1st invariant of deformation tensor defined in a predetermined number of points of the heated (cooled) element loaded by a single force. A program of experimental investigations is suggested. Results of a full-scale experiment are given by the example of a joint of monolithic reinforced concrete slab and column. The comparison of the values obtained experimentally and by using the proposed technique made the difference of 5- 15%. By means of expanding the technical base, the possibilities of the method can be significantly expanded. This method allows testing the types of structures varying in shape and application: bodies, shells, plates, rods, combinations thereof, etc.