TEMPERATURE EFFECTS IN MULTI-STORY BUILDINGS

Abstract

This paper presents an analytical study to investigate the effect of daily and seasonal temperature changes on the multi-story concrete structures. Two and three-dimensional calculations have been carried out by applying a temperature loadings on concrete structures, taken into consideration different cases of structure configurations and support conditions. The temperature loading were either a uniform drop of temperature or linear gradient temperature. The results were investigated and compared to each other. NOTATION A Area of cross section, m 2 R Degree of restrain b Width of cross section, m T Ambient temperature E c Modulus of elasticity of concrete, kg/cm 2 Greek Symbols h Depth of the cross section, m α Coefficient of heat expansion, 1/°C H Floor height, m a ε Axial strain at centroid I Second moment of inertia, m 4 T ε Free thermal strain M Bending moment, Ton.m T ε Restrained component of thermal strain N Axial force, Ton φ Curvature n Depth of natural axis, m n σ Net stress P Restraining axial force, Ton T ∆ Change in temperature, °C