STAGED CONSTRUCTION ANALYSIS OF REINFORCED CONCRETE BUILDINGS WITH DIFFERENT LATERAL LOAD RESISTING SYSTEMS

Abstract

Practitioners used to analyze Reinforced Concrete (RC) buildings using the One Step Analysis (OSA), where loads are applied to the whole structure as one unit. However, this assumption is not realistic because buildings are constructed storey by storey and dead load acts sequentially. This sequential nature of construction is considered in a more accurate approach which is called Staged-Construction Analysis (SCA). Current codes for RC structures are limited to OSA and they do not provide any provisions for SCA. In this research, a nonlinear Finite Element Model (FEM) for SCA of RC buildings is developed using the commercial software, MIDAS-Gen. The developed model accounts for time dependent effects such as shrinkage and creep. The model is utilized to analyze RC buildings with Rigid Frame (RF), Shear Wall (SW), Wall-Frame (WF) and Tube in Tube (TT) systems. Design parameters for the studied buildings are selected according to the current codes.