Determination of efforts from temperature and humidity exposure in walls

Abstract

The construction of large-panel buildings has more than half a century of history, during which space-planning and design solutions have been improved, methods of calculation have been developed and the regulatory and technical base has been updated. For this period, accurate and approximate calculation methods, both of individual structural elements and the structural systems of buildings on the whole, have been harmonised and verified, the technologies and techniques of automated calculation methods and software systems for their implementation have been developed. One of the features of the life cycle of the housing stock of large-panel buildings is that over the long period of their operation, the regulatory and technical base on which they were designed periodically underwent changes. In terms of ensuring constructive safety from the effect of power loads on buildings, a system of fixed coefficients of working conditions supports the continuity of development of design standards. The affection of temperature and humidity exposure is determined according to the requirements for the temperature difference between the outer and inner surfaces of the outer walls. Based on the accumulated experimental data for the past years between the design period and the current period of operation, the numerical standard values of the heat transfer coefficients of the inner and outer surfaces of the enclosing structures have changed in relation to the previous standards by which these structures were designed. This necessitates a re-evaluation of efforts caused by temperature and humidity exposure in order to make a decision on the need to strengthen structures.