Friction self-locking type prefabricated section spliced pier connecting device

Abstract

The invention relates to a friction self-locking type prefabricated section spliced pier connecting device. Prestressed tendons in a traditional section spliced pier connecting device are omitted. A concrete-filled steel tube mode is adopted for locally reinforcing a connecting area. An outer casing tube with a larger diameter and an inner casing tube with a smaller diameter are adopted as concrete-filled steel tubes at the two ends for connection respectively. The inner steel tube and the outer steel tube are connected in a sleeved mode in the section splicing process, self-locking pins are struck into the part between the inner steel tube and the outer steel tube, friction self-locking is made to be formed between the inner casing tube and the outer casing tube, and the tight connection between sections is ensured. Due to the fact that the thickness of the outer casing tube and the gradient of the self-locking pins are reasonably designed, the connecting structure can maintain flexibility during frequent earthquakes and have sliding friction during rare occurrence earthquakes, and thus earthquake energy is dissipated.

Description

technical field [0001] The invention relates to a prefabricated segmental assembled pier connection, which is suitable for various bridge projects requiring rapid construction. technical background [0002] With the advancement of urban traffic and the construction of cross-sea bridges, the demand for rapid construction of bridges within limited sites has gradually increased. However, the traditional cast-in-place concrete bridge construction method inevitably needs to wait for the concrete to set, resulting in a longer construction period. Moreover, the quality of cast-in-place concrete is affected by the site environment, and it is difficult to guarantee the durability in harsh environments. Prefabricated assembly technology is a feasible means to solve this contradiction. At present, the prefabrication technology of the bridge superstructure has become mature, while the prefabrication technology of the bridge substructure, especially the pier column, is less applied. E...

AI Technical Summary

Problems solved by technology

In order to ensure that the segmental concrete will not be severely crushed when resisting the earthquake, steel pipes or FRP materials must be used to reinforce the entire segment or high-grade special concrete, resulting in high cost

Moreover, the energy dissipation performance of the segmental connection with only unbonded prestressed tendons is poor. In order to ensure the energy dissipation performance of the connection, it is usually necessary to ensure that a certain number of energy-dissipating steel bars pass through the splicing joints.

However, the energy-dissipating steel bars will increase the residual displacement, weaken the self-resetting performance of segmentally assembled piers, and cause more troublesome construction

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