Determination of Member Connection Stiffness For Semi-Precast High-Rise Building

Abstract

Currently, in Vietnam, the semi-precast high-rise buildings are popular construction structures because of material saving and low construction cost, meeting the requirements of a part of residents with medium and low incomes. However, in the assembly process of these structures, the technical requirements for the connections between prefabricated components as well as between prefabricated components and monolithic components are very important and required a proper analysis. Accurate modeling is very important in structural analysis, as well as analysis of behavior for high-rise semi-precast buildings, especially when they are in the possible earthquake areas. In order to be able to model the real structure, the value of connection stiffness between the components needs to be determined relative correctly. The paper presents how to determine the member connection stiffness of semi-precast high-rise buildings using the finite element method. Verifying the correctness of the member connection stiffness value is carried out through dynamic parameters such as natural frequency and the damping ratio obtained by the experiments of the miniature model of semi-precast high-rise buildings on shaking table test. From there, some comments and recommendations on the suitable model for semi-precast high-rise buildings will be proposed for analysis of these structures more accurately.