The Dynamic Behavior of High-rise Building with Soil-Structure Interaction and the Application of Tuned Mass Damper

Abstract

The trend of the slender and high-rise building has made the structure prone to dynamic loading. This thesis is focused on the dynamic behavior of the high-rise building subjected to wind action. The acceleration becomes a limiting criterion in designing such structure which can be categorized as the comfort criteria of the building. Nausea and motion sickness from the acceleration of the building has been studied by human experience, and numerous building code has included this in the design criteria [6]. The tuned mass damper (TMD) comes from the basic vibration absorber theory by Frahm in 1909; then the studied continued and applied in a building. At present, the TMD is a well-known technology to mitigate vibration, but it is not always applicable in every building case. Therefore a study of the interaction between the building properties also the soil structure interaction (SSI) is made in the application of the TMD.This thesis aims to study the dynamic behavior of a high rise building with the implementation of TMD and to take into account the SSI, also to indicate which type of building is preferable to apply a TMD. The model for the high-rise building is an analytical one-dimensional model which is validated by the finite element program (FEP). The analytical model can give a good fit for the building response but due to the model of the wind load is a random load, it is challenging to match precisely the TMD performance due to the comparison of different load phase. The physical characteristic and tendency of the TMD performance to different building parameter still can be studied in this analytical model. It is shown in this study that the damping plays an important role not only to reduce the acceleration of the building but also influence the effectiveness of TMD. The acceleration is drastically reduced in the lower damping ratio area, which makes theTMD more effective if the building has lower damping ratio contributed from the material, structural joints, and SSI. The reducement of the acceleration by increasing stiffness and mass is very limited compared to the application of TMD. There are two building data for the base of the analysis; the first is the European Patent Office EPO building which is designed by Zonneveld Ingenieurs and the new proposal of slender high rise building in Rotterdam. The EPO building has a unique geometry which the contribution of torsional vibration is high. The slender high rise building shows that the TMD is more effective in reducing the acceleration in this case. The reason is the slender high rise has higher acceleration compare to EPO building when the required building stiffness for the deformation limit is applied.