2nd World Congress and Exhibition on Construction and Steel Structure
Las Vegas, USA
Korea Advanced Institute of Science and Technology
Title: Time-Dependent Analysis of RC structures considering the construction sequences and structural symmetry
Biography: WonHo Lee
The analysis and design of a reinforced concrete (RC) structures are generally conducted based on the complete structures. However, the construction of a RC structure is accomplished through a sequential construction, and the change in the structural system during each construction step causes remarkable differences in the structural behavior. This research deals with rigorous analysis of RC frame structures and prediction of exact structural response during the construction.. Time-dependent deformations of concrete such as creep and shrinkage are taken into consideration and the construction sequences are described. The stiffness matrix of a beam element is derived on the basis of the layer approach, dividing a section with imaginary layers, and the iteration method adopted for structure analysis is the combined method. Creep and shrinkage strains at each layer are calculated by using the first order algorithm based on the expansion of creep compliance. Correlation studies with the numerical analysis results of low-rise, medium-rise, and high-rise RC frame structures are conducted to assess the differences in structural responses according to the construction sequences and profile of the structure.