Some considerations in the design of natural rubber bearings for the Penang bridge

Chin F. K., . Some considerations in the design of natural rubber bearings for the Penang bridge. pp. 64-70. ISSN 0127-7065

Natural rubber bearings have gained widespread application in reinforced concrete and in prestressed concrete bridges. They were installed in the Penang Bridge Project. Certain important findings in regard to the durability and fatigue life of NR for bridge bearings are reviewed in relation to the requirements of the site of the Penang Bridge. In good design rubber is normally not used in tension. To ensure that no point in the rubber bearing is subjected to an upward movement and results in hydrostatic tension rotations are limited by BE 1/762 in accordance to which the NR bearings for the Penang Bridge Project were designed. The most likely stage in which the rubber may be subjected to tensile stresses is in the early period of the construction when the precast prestressed concrete beam is first installed on the top of the supporting bearings. Compressive load-deflection test results of some of the installed bearings are presented. On the basis of these test results and together with the actual deflections of a precast prestressed concrete beam measured at the site a computation is presented to verify that at no stage in its service life the rubber bearing concerned will be subjected to tensile stress.

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Abstract

Natural rubber bearings have gained widespread application in reinforced concrete and in prestressed concrete bridges. They were installed in the Penang Bridge Project. Certain important findings in regard to the durability and fatigue life of NR for bridge bearings are reviewed in relation to the requirements of the site of the Penang Bridge. In good design rubber is normally not used in tension. To ensure that no point in the rubber bearing is subjected to an upward movement and results in hydrostatic tension rotations are limited by BE 1/762 in accordance to which the NR bearings for the Penang Bridge Project were designed. The most likely stage in which the rubber may be subjected to tensile stresses is in the early period of the construction when the precast prestressed concrete beam is first installed on the top of the supporting bearings. Compressive load-deflection test results of some of the installed bearings are presented. On the basis of these test results and together with the actual deflections of a precast prestressed concrete beam measured at the site a computation is presented to verify that at no stage in its service life the rubber bearing concerned will be subjected to tensile stress.

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Item Type:	Article
AGROVOC Term:	Natural rubber
AGROVOC Term:	Rubber
AGROVOC Term:	Concrete
AGROVOC Term:	Construction materials
AGROVOC Term:	Design
AGROVOC Term:	Compression (process)
AGROVOC Term:	Hydrostatic pressure
AGROVOC Term:	Tensile strength
AGROVOC Term:	Building construction
AGROVOC Term:	Physical properties
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 05:15
URI:	http://webagris.upm.edu.my/id/eprint/23597

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