Multi-stage swing system for quickly connecting prefabricated assembled pier and bearing platform

Abstract

The invention relates to a multi-stage swing system for quickly connecting a prefabricated assembled pier and a bearing platform. The system mainly comprises a bottom sealing plate, an upper disc, prestressed tendons, a U-shaped energy dissipater, a lower disc and limiting angle steel. The bottom sealing plate is anchored at the bottom of the pier column; the upper disc comprises a top plate, a groove and a support plate; the lower disc comprises a ball pin, a ball pin step and a bottom plate; the groove and the ball pin are nested with each other to limit the transverse displacement of the upper disc, a first support plate is supported on the ball pin step, and the ball pin and the ball pin step bear a vertical load together; a second support plate is connected with the bottom plate through limiting angle steel to limit relative rotation of the upper disc and the lower disc; the U-shaped energy dissipater is arranged between the top plate and the bottom plate, and a steel base plate is arranged between the bottom sealing plate and the upper disc when necessary so that the U-shaped energy dissipater can be anchored and replaced; the lower disc is fixed on a bearing platform. Compared with the prior art, the multi-stage swing system has the advantages that the recovery torque is increased and the structural period is prolonged by changing the swing fulcrum, and only the U-shapedenergy dissipater needs to be replaced after vibration to facilitate quick recovery.

Description

technical field [0001] The invention relates to the fields of bridge engineering and earthquake engineering, in particular to a multi-stage rocking system for quick connection between prefabricated and assembled bridge piers and caps. Background technique [0002] Bridges are a key component of the transportation system, especially during emergencies or disasters, it is of great significance to ensure the smooth flow of bridges. The current seismic design method of bridges at home and abroad mainly uses the ductility of bridge piers for seismic design, allowing bridge piers to enter plasticity and form plastic hinges. Under strong earthquakes, bridge piers may be seriously damaged, resulting in large plastic deformation, and the concrete protective layer in the plastic hinge area may peel off , the piers will have permanent residual displacement after the earthquake. The investigation of bridge earthquake damage shows that the residual displacement of bridge piers is the ma...

AI Technical Summary

Problems solved by technology

Although the prefabricated assembly shortens the on-site construction time, there are still a series of work on site, such as the wet connection of the prefabricated section and the cap, as well as prestressed tendon tensioning and duct grouting, and the strength of the wet joint section and grouting requires a lot of work. certain time

In addition, it is impossible to check the anchorage after the prestressed tendon is anchored at the bottom of the cap

Images