Pier energy consumption and anti-crushing structure with replaceable composite board built-in energy consumption steel boards

Abstract

The invention provides a pier energy consumption and anti-crushing structure with replaceable composite board built-in energy consumption steel boards. According to the structure, each of the four edges of a pier bottom section is provided with two overlapped ultra high performance concrete (UHPC) boards, and a pipeline is reserved between every two corresponding UHPC boards for containing the corresponding energy consumption steel board; finish rolled thread reinforcing steel bars transversely penetrate the UHPC boards and the pier bottom section and are anchored through high-strength nuts and steel pads, and prestress is applied through the finish rolled thread reinforcing steel bars, so that the UHPC boards and the pier bottom section are combined into a whole; the energy consumption steel boards are connected with embedded steel rods in an upper section and a bearing platform through reserved holes in the ends; and rubber pad layers need to be arranged between the pier bottom section and the upper section and between the UHPC boards and the upper section. The pier energy consumption and anti-crushing structure is used for treating a dry joint section spliced pier, it can be guaranteed that the pier has the good energy consumption capacity under the stimulation of an earthquake, the bottom section can be prevented from being severely crushed, the pier can be rapidly repaired through replacement of the UHPC boards and the energy consumption steel boards after the earthquake, the use function of a bridge is restored in time, and the influences caused by the earthquake on traffic are reduced.

Description

technical field [0001] The invention relates to a rapid construction technology and an anti-seismic design method of a bridge in a medium-high intensity area, in particular to a segmental assembly technology, an external prestressing technology and a shock absorption and isolation technology using metal materials to consume energy, and belongs to the field of civil engineering. Background technique [0002] Due to the advantages of rapid construction and self-resetting ability, dry joint segmental assembled piers have been applied in some river-crossing and sea-crossing bridges, including the Hong Kong-Zhuhai-Macao Bridge and the Canadian Confederation Bridge. This type of bridge pier divides the pier body into several sections vertically, the longitudinally stressed steel bars are broken at the joints of the sections, and the sections are connected by "dry joints" or filled at the joints. Epoxy resin is used to improve the durability of the piers, and then the segments are ...

AI Technical Summary

Problems solved by technology

Although this method can improve the energy dissipation capacity of the bridge pier, it will also increase the residual deformation of the bridge pier after the earthquake, and the built-in energy dissipation steel bars are not easy to replace after the earthquake

[0004] Aiming at the problem that the bottom section of piers assembled with dry joint sections is easy to be crushed under earthquake excitation, the most widely used method in engineering is to add constraints to the concrete at the bottom section to improve the deformation capacity of the concrete, including adding constraints to the concrete at the bottom section The amount of stirrups, the use of concrete-filled steel tubes to make the bottom segment, or wrapping FRP outside the concrete of the bottom segment can indeed reduce the damage of the bottom segment under earthquake excitation, but the damaged concrete is also difficult to replace after the earthquake question

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