Self-reset precast assembled bridge pier with internally-installed prestress FRP rebars and construction method for self-reset precast assembled bridge pier

Abstract

The invention discloses a self-reset precast assembled bridge pier with internally-installed prestress FRP rebars and a construction method for the self-reset precast assembled bridge pier. The bridge pier comprises a main structure body composed of a bearing platform, swing segments, a transition segment and a general segment, [-shaped grooves are formed in the end portion of the bearing platform, and the end portion of the bearing platform is nested in a single wall steel sleeve; [-shaped grooves are formed in the two ends of each swing segment and the lower end of the transition segment, and the two ends of each swing segment and the lower end of the transition segment are nested in dual-wall steel sleeves; and no [-shaped groove and dual-wall steel sleeve is arranged at the upper end of the transition segment and the two ends of the general segment, a viscous damper is installed in each [-shaped groove, and the prestress FRP rebars are tensioned between the bearing platform and the transition segment. According to the self-reset precast assembled bridge pier with the internally-installed prestress FRP rebars and the construction method for the self-reset precast assembled bridge pier, not only can the self-reset capacity of the precast assembled bridge pier (single column pier) be improved precisely, but also the use performance of a damaged bridge pier can be restored quickly.

Description

technical field [0001] The invention belongs to the fields of civil engineering, construction engineering, highway engineering and municipal engineering, and relates to a self-resetting prefabricated assembled bridge pier with built-in prestressed FRP tendons. Background technique [0002] Segmentally assembled prefabricated concrete piers have the advantages of fast construction, reliable quality, little impact on the environment, and little impact on traffic. application. This type of bridge pier divides the pier body into several sections vertically, the longitudinally stressed steel bars are disconnected between the sections, and the sections are connected by dry joints, or filled with epoxy resin, and post-tensioned. connect the segments into a whole. Domestic and foreign scholars have found through experiments and theoretical research that prefabricated piers with dry joints will sway to a certain extent under the action of earthquakes, and their self-resetting abili...

AI Technical Summary

Problems solved by technology

In this invention, non-bonded prestressed tendons are vertically arranged at the lower part of the thin-walled hollow pier to provide the self-resetting ability of the bridge pier after an earthquake. No full-length prestressed tendons are installed, but the prestressed tendons are located inside the hollow pier, and it is difficult to Carry out supplementary construction

[0008] To sum up, in the existing public literature, most of the self-resetting capabilities of piers are provided by piercing through long prestressed tendons. For bridge pier structures with non-through-length prestressed tendons, the location of the prestressed tendons and the way of tensioning and anchoring are completely different from those in this paper.

In addition, there is no structure specially designed for supplementary tension prestressing

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