Reduction of torsional effect using rubber bearings in buildings subjected to earthquake

Lee J. J., . and Kamarudin A. M., . Reduction of torsional effect using rubber bearings in buildings subjected to earthquake. pp. 24-40. ISSN 1511-1768

The use of seismic rubber bearings for base isolation has been proven effective to protect both the structure and its contents from earthquake damage and to ensure functionality of the structure after a major earthquake. The design of an effective base isolation system depends on the shear stiffness of the bearings which also influences the behaviour of a base isolated building under dynamic load. Imbalance distribution of bearing shear stiffness over the projected centre of mass of the building will lead to a torsional deformation which could cause catastrophic damage. In order to ensure the centre of stiffness of the base isolation system coincides with the projected centre of mass of the building trials need to be carried out to determine the suitable bearing stiffness combination and bearing location. This is tedious as the system often consists of large number of bearings. To circumvent the problem and reduce the working time a programme has been written to determine the bearing stiffness distribution. The programme was developed in a spreadsheet and guides the user to determine the final stiffness combination for the seismic rubber bearing system. Results on structural analysis highlighting the effects of base isolation and torsion of symmetrical and asymmetrical buildings are discussed.

Full text available from: Official URL: http://vitaldoc.lgm.gov.my:8060/vital/access/servi...

Abstract

The use of seismic rubber bearings for base isolation has been proven effective to protect both the structure and its contents from earthquake damage and to ensure functionality of the structure after a major earthquake. The design of an effective base isolation system depends on the shear stiffness of the bearings which also influences the behaviour of a base isolated building under dynamic load. Imbalance distribution of bearing shear stiffness over the projected centre of mass of the building will lead to a torsional deformation which could cause catastrophic damage. In order to ensure the centre of stiffness of the base isolation system coincides with the projected centre of mass of the building trials need to be carried out to determine the suitable bearing stiffness combination and bearing location. This is tedious as the system often consists of large number of bearings. To circumvent the problem and reduce the working time a programme has been written to determine the bearing stiffness distribution. The programme was developed in a spreadsheet and guides the user to determine the final stiffness combination for the seismic rubber bearing system. Results on structural analysis highlighting the effects of base isolation and torsion of symmetrical and asymmetrical buildings are discussed.

[error in script]

Item Type:	Article
AGROVOC Term:	Natural rubber
AGROVOC Term:	Earthquakes
AGROVOC Term:	Reduction
AGROVOC Term:	Building structures
AGROVOC Term:	Building components
AGROVOC Term:	Project design
AGROVOC Term:	Integrated protection
AGROVOC Term:	Isolation
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 02:31
URI:	http://webagris.upm.edu.my/id/eprint/23007

Actions (login required)

View Item