Self-resetting prefabricated bidirectional coupled high-speed rail pier with local UHPC (Ultra High Performance Concrete) restorable function

Abstract

The invention discloses a local UHPC (Ultra High Performance Concrete) recoverable function self-resetting prefabricated bidirectional coupled high-speed rail pier which comprises a bearing platform and a cover beam supported above the bearing platform through a vertical supporting structure, and the cover beam is a prefabricated part; the vertical supporting structure comprises a prefabricated pier bottom section, a prefabricated pier-coupling beam section and an unbonded prestressed steel strand; the prefabricated pier bottom sections are fixed on the bearing platform in a matrix arrangement manner; a prefabricated pier-coupling beam section is arranged on the top surface of the prefabricated pier bottom section; the prefabricated pier-coupling beam section comprises a prefabricated pier section and a prefabricated coupling beam; a feasible structural form is provided for applying a prefabrication construction technology to the high-speed rail bridge pier, by means of the structural form, the structural rigidity requirement and the rapid construction requirement can be both considered, the shear state of the bridge pier is improved, it can be guaranteed that the bridge pier has good deformation capacity under the earthquake action, and only replaceable damage elements are damaged; the prefabricated high-speed rail pier is further developed into a post-earthquake function recoverable structure, and the requirement for toughness and earthquake resistance is met.

Description

technical field [0001] The invention relates to a self-resetting prefabricated two-way combined high-speed rail bridge pier with local UHPC recoverable function, which can realize rapid recovery of the pier function after an earthquake, and belongs to the technical field of earthquake resistance and shock absorption of bridge engineering. Background technique [0002] High-speed rail bridges are "large in quantity and wide in scope" and have a high degree of standardization, which is suitable for promoting the industrialized construction of bridges. At present, the prefabricated production level of the upper structure of high-speed railway bridges is relatively high, but the lower structure is still dominated by traditional cast-in-place construction. The existing prefabricated pier construction technology is mainly for highway or municipal bridges. During the construction process, the pier is first divided into several sections along the vertical direction according to the ...

AI Technical Summary

Problems solved by technology

Determining the large deformation part, selecting the location of the replaceable damage element from the large deformation part, selecting a reasonable connection method between the large deformation part and the replaceable damage element, and ensuring that the large deformation part does not suffer damage under the action of the earthquake, all these become The content that must be considered in the structural toughness seismic design also determines that the traditional cast-in-place concrete structure is difficult to naturally meet the requirements of the toughness seismic design, and structural innovation is required

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