Compensation of non-uniform vertical displacements of hybrid timber-reinforced concrete multi-storey buildings

Problem statement. The design of multi-storey buildings is based on the requirements of both load-bearing capacity and serviceability limit states. Criteria for serviceability include limiting the amount of displacements of the upper part of the building in the horizontal plane, oscillations of the floors, accelerations of the building caused by wind load, as well as non-uniform shortening of vertical elements. Uneven shortening occurs due to differences in deformation characteristics of the structural materials, cross-sectional areas, load-transfer areas of vertical elements in adjacent spans. For today the issues of forecasting and compensation of deformations of elements of hybrid buildings are insufficiently revealed. The purpose of the article is to develop a method of compensation for non-uniform vertical displacements of elements of hybrid wood-reinforced concrete high-rise buildings. Results and conclusion. The article considers and analyzes the main existing methods for compensating for non-uniform deformations, among which are absolute, uniform, group and optimal compensation. Using the basic principles of the group compensation method, a method for compensating for non-uniform vertical displacements of hybrid wood-reinforced concrete multi-storey buildings is proposed. The main dependencies are given and the procedure for implementing the proposed method is described. Limit values of non-uniform vertical displacements are determined as a criterion for finding the optimal number of floor groups and the number of floors in a group. The practical value of the method lies in the possibility of determining the height correction for the load-bearing structures of hybrid timber-reinforced concrete multi-storey buildings to minimize the negative consequences of uneven deformation.