The Structural Engineer > Archive > Volume 76 (1998) > Issues > Issue 11 > Dynamic Response of Republic Plaza, Singapore
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Dynamic Response of Republic Plaza, Singapore

Republic Plaza, with a structural height of 281m, is the tallest building in Singapore. This paper describes measurements of dynamic properties made during the construction period and the detailed modal description obtained for the completed, but unoccupied, structure. The dynamic characteristics show that, despite the apparent simple symmetry, which leads to two very close fundamental translational natural frequencies, many of the higher modes have strong torsional components whose nature has been determined in the measurements. Finite element modelling of the core wall/steel framing system gives reasonable agreement with the measured translational fundamental frequencies but, without a high level of refinement, cannot reflect the torsional behaviour. There is no evidence that the curtain wall system affects stiffness or damping properties of the structure at low excitation levels. J.M.W. Brownjohn, T-C. Pan and H-K. Cheong

Author(s): Brownjohn, J M W;Pan, T C;Cheong, H K

Keywords: multistorey buildings;natural frequencies;construction work;modelling;finite element methods;analysis;curtain walls;shear walls