COLUMN LOAD BALANCING IN PRESTRESSED CONCRETE BUILDING

Abstract

In the design of the 27-storey Wisma Dharmala office complex in Jakarta, architectural and structural considerations led to the deployment of twin-column clusters around the perimeter as well as the interior of the tower block. The column load balancing method. It is proposed to mitigate excessive differential axial shortening between the twin columns in the clusters due to large difference in axial loads. The cable profiles in the prestressed girders are designed not only for moment balancing but also to transfer evenly the shearing forces in the girders to the twin columns in each cluster. The influence and the analysis of the load distribution in successive floors due to floor-scaffolding interaction and train measurements by using vibrating wire acoustic strain gauge in the field investigation are also discussed in details.