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008			220216s9999 xx 000 0 und d
100			_aKee Chin Fung
245		0	_aSome considerations in the design of natural rubber bearings for the Penang bridge
260			_bJournal of Natural Rubber Research _c1986
300			_a64-70
520			_aNatural 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 bearings is subjected to an upward movement and results in hydrostatic tension, relations are limited by BE 1/76 2 in accordance to which the NR bearings for the Penang Bride 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 preseented. On the basis of these test results and together with 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 bearings concerned will be subjected to tensile stress.
650			_aNatural Rubber
650			_aPenang bridge
942			_cJS
999			_c68950 _d68950