Energy dissipation and seismic mitigation type self-resetting prefabricated segment assembled pier structure and construction method thereof

Abstract

The invention provides an energy dissipation and seismic mitigation type self-resetting prefabricated segment assembled pier structure and a construction method thereof. The pier structure comprises abearing platform, a pier body, prefabricated sections, a bent cap and unbonded prestressed tendons, wherein the pier body is arranged on the bearing platform; the bent cap is arranged on the pier body; the bearing platform, the pier body and the bent cap are connected into a whole through the unbonded prestressed tendons; the pier body is formed by vertically stacking a plurality of prefabricatedsections; combined type steel pin rod (lead pin rod) shear keys are evenly arranged in the cross section of the joint between every two of the bearing platform, the prefabricated segment and the bentcap; the outer side of the joint area is connected through a low-carbon steel energy dissipation plate. The shear torsion resistance and the energy dissipation capacity of the pier are improved through the combined shear keys and the low-carbon steel energy dissipation plates, and meanwhile, the lateral stiffness of the pier at different heights is adjusted through the prestressed tendons which are dispersedly anchored in multiple sections, so that the anti-seismic requirements under the action of different levels of earthquakes are met.

Description

technical field [0001] The invention relates to the technical field of prefabricated segmental assembled bridge piers, in particular to an energy-consuming and shock-absorbing self-resetting prefabricated segmental assembled bridge pier structure and a construction method thereof. Background technique [0002] Compared with in-situ cast-in-place bridges, prefabricated assembled bridges (prefabricated bridges) have a series of advantages such as fast construction speed, high quality prefabricated components, less construction interference factors, small construction safety risks, and green environmental protection, especially for urban bridges. The prefabricated assembled structure can effectively reduce the interference to the existing traffic in the urban area, and reduce the impact of construction vibration and noise on the surrounding residents. In view of the above advantages, prefabricated bridges have received extensive attention in recent years. Compared with the upp...

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Problems solved by technology

[0016] (1) Concrete shear key: Stress concentration is prone to occur around the shear key under load. In severe cases, the convex key will be sheared, and the concrete around the concave key will have serious oblique cracks, which are difficult to repair after damage

[0017] (2) Steel shear key: The existing steel shear key has a complex structure and requires high construction accuracy. After an earthquake, it is prone to large plastic deformation and is not easy to replace

The structure of some external energy-consuming devices is complicated, and it is difficult to guarantee the durability and reliability under harsh service conditions

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