Integral bridge multistage abutment flexible main abutment with replaceable dampers and application thereof

Abstract

The invention relates to an integral bridge multistage abutment flexible main abutment with replaceable dampers. The integral bridge multistage abutment flexible main abutment comprises a main beam, aguide plate and a wiring road surface which are sequentially arranged. a main abutment and a rigid expanded foundation are sequentially arranged between the main beam and the guide plate from top tobottom, a secondary abutment is arranged between the guide plate and the wiring road surface, the main abutment and the rigid expanded foundation are pulled into a whole through prestressed tendons, and a plurality of dampers are arranged between the periphery of the main abutment and the rigid expanded foundation. The self-resetting capability and the anti-overturning capability of the integral abutment under the action of an earthquake are provided through the prestressed tendons. And meanwhile, the dampers are arranged between the main abutment and the rigid enlarged foundation, the lateralforce resistance is improved through the dampers, earthquake energy is consumed, and the dampers damaged after an earthquake can be replaced. The combination of the prestressed tendons and the dampers not only has good self-resetting capacity, but also has high consumption capacity, and damage to the abutment can be reduced to a certain extent. The method is suitable for the integral bridge withhigh requirements on deformation and anti-seismic property.

Description

technical field [0001] The invention relates to a flexible main abutment of an integral bridge multi-stage abutment with a replaceable damper and the application thereof. Background technique [0002] The seismic problem of bridges has always been the focus of engineering and academic circles. Although bridge design codes in various countries have detailed seismic design methods and requirements, there are still many bridge failures and collapses in each earthquake. my country is an earthquake-prone country with frequent earthquakes and strong magnitudes. Seismic activity is mainly distributed in the southwest, northwest, south China and the Taiwan Strait, and there are many bridges in these places. Although the seamless bridge has better seismic performance than the slotted bridge, the research on its seismic performance is still a very important subject. [0003] The upper and lower structures of the overall bridge are connected as a whole, without expansion joints and ...

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Problems solved by technology

[0005] For the transverse bridge direction, the soil behind the abutment is basically unable to play a role, and the first-order mode shape of the overall bridge is generally transverse bridge direction, so the transverse bridge direction damage of the pile foundation and abutment is more likely to occur under earthquake action

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