Bridge ductility anti-earthquake structure easy to replace after earthquake and construction method

Abstract

The invention discloses a bridge ductility anti-earthquake structure easy to replace after an earthquake. The bridge ductility anti-earthquake structure is composed of a foundation and anti-earthquakechock blocks, wherein the foundation and the anti-earthquake chock blocks are relatively independent; the anti-earthquake chock blocks are arranged on the upper side surface of the foundation; and the anti-earthquake chock blocks are connected with the foundation through a plurality of vertical shear reinforcements. Based on the above-mentioned structure, the invention also discloses a corresponding construction method. The bridge ductility anti-earthquake structure easy to replace after the earthquake and the construction method, disclosed by the invention, have the following beneficial technical effects: the deformation quantity of the bridge ductility anti-earthquake structure is larger, so that the transverse displacement of a girder can be better limited; after the anti-earthquake chock blocks are damaged, the damage to the foundation is less; and the anti-earthquake chock blocks are relatively convenient to replace, thereby being favorable for repairing in rescue and relief works after the earthquake.

Description

technical field [0001] The invention relates to a bridge anti-seismic and post-earthquake repair technology, in particular to a bridge ductile anti-seismic structure and a construction method that can be easily replaced after an earthquake. Background technique [0002] Small and medium-span girder bridges with plate rubber bearings account for a high proportion of my country's transportation infrastructure. On the support, the plate rubber bearing is directly placed on the pad stone of the pier cover beam and abutment cap, and there is no connection construction measure between the beam body, the plate rubber bearing and the pad stone; in order to limit the main girder under the earthquake For lateral displacement, it is the most common and common way to set stoppers at both ends of the bridge pier cap beam and abutment cap. Therefore, the stoppers are also called "seismic stoppers". The lateral displacement of the main girder is limited to prevent the plate rubber bearing fr...

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Problems solved by technology

[0003] According to the survey, during the Wenchuan earthquake, almost all the seismic blocks on bridges were damaged to varying degrees, and the proportion of them being completely sheared was as high as 19.5%. The horizontal seating of the main girder is not restricted, nor is it effective in protecting the plate rubber bearings. The damage ratio of the plate rubber bearings is as high as 16.6%, especially the pier cap beams and abutment caps are severely damaged, which requires post-earthquake repairs. It has brought great difficulties; therefore, the mechanical properties and failure modes of the existing anti-seismic blocks are very unfavorable to the lateral seismic resistance of the bridge, and are very unfavorable for the development of post-earthquake disaster relief work. Better ductile seismic structures have important social and economic benefits

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