Exploring the effect of expansion joints spacing in concrete multistory buildings

摘要

Temperature and shrinkage effects may cause cracks and additional stresses in the structural componentsrnof concrete buildings. In order to limit the undesirable effects of temperature and shrinkage, it isrnrecommended by many building codes to use expansion joints in long buildings. In this study the effectrnof temperature and shrinkage on multistory buildings was explored. 3D finite element models werernconstructed for multistory buildings with different lengths and heights, and analyzed using variousrntemperature loads. A factor termed in this study the temperature design ratio was developed tornevaluate the maximum spacing between expansion joints that can be used with out includingrntemperature effects in the analysis. This factor was calculated by comparing the design obtainedrnusing temperature and vertical loads to that obtained using vertical loads alone. Different factorsrnaffecting the response of the structure to temperature strains were also studied.