CREEP ANALYSIS OF CONCRETE BUILDINGS DURING CONSTRUCTION

During construction of high-rise concrete buildings, the freshly placed concrete floor is supported by shores and reshores, which are in turn supported by several previously cast floor slabs. To avoid unexpected failures, it is necessary to calculate the load distribution at every construction step and to make sure that the loads carried by the supporting components do not exceed their strength. However, it is rather difficult to estimate accurately the load distribution in the system because of the time-dependent behavior of building materials and the complexity of construction stages. In this paper, a new method for calculating stress and strain distributions in the structural system at every construction step including the creep effect is developed. The general validity of the approach has been demonstrated by comparisons with computed shore loads, slab moment, and displacements using the present and conventional methods of analysis.