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Seismic basin bearing of Highway Bridge

The largest GPZ (II) 55mn-sx produced by our company is used for Nantong Binjiang bridge
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Product description

The largest GPZ (II) 55mn-sx produced by our company is used for Nantong Binjiang bridge

 

Structural features and functions

 

GPZ (II) basin type rubber bearing is a modified product of GPZ series. Its working principle is that the rubber block enclosed in the steel pelvic cavity has the characteristics of incompressibility of fluid volume under three-dimensional stress, which can reliably transfer the reaction force of bridge superstructure to pier abutment and realize the rotation of bridge beam end; At the same time, depending on the free sliding between PTFE and stainless steel plate, it can adapt to the horizontal displacement of bridge superstructure caused by temperature change, concrete creep and shrinkage, so as to ensure the safety of the bridge. This product is suitable for all kinds of high-grade highway bridges and other large and medium-sized bridges.

 

GPZ (II) basin type rubber bearing is designed by CCCC highway planning and Design Institute and produced according to jt391-1999 "basin rubber bearing for highway bridge" standard issued by the Ministry of communications. Based on the original GPZ series pot rubber bearing, great improvement has been made

 

1.1 the design bearing capacity of the bearing is expanded from 1000kn-50000kn to 0.8-60mn, and the grade difference is increased from 18 to 31, which expands the application range.

1.2 the minimum design friction coefficient of normal temperature movable bearing is reduced from 0.04 to 0.03.

1.3 the bearing angle is enlarged from 0.01164rad (40 ') to 0.02rad (1.3) ° 08')。

1.4 the displacement series is increased from the original two-stage to the third-order.

1.5 for the convenience of bearing replacement, the design of anchor bolt is improved;

1.6 the plane dimension of the support is adjusted.

 

The improved GPZ (II) basin type rubber bearing has reasonable design and compact structure, which has reached the international level.

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