Unbonded post-tensioning prestress concrete-filled double-wall steel pipe prefabricated assembly piers with additional dampers

Abstract

The invention discloses unbonded post-tensioning prestress concrete-filled double-wall steel pipe prefabricated assembly piers with additional dampers. The piers comprise a bearing table, prefabricated assembly pier bodies and a cover beam. The piers are characterized in that prefabricated assembly pier bodies are concrete-filled double-wall steel pipe prefabricated assembly pier bodies, each prefabricated assembly pier body comprises an outer steel pipe, an inner steel pipe and filled concrete, the end faces of the tops and the end faces of the bottoms of the outer steel pipes and the end faces of the tops and the end faces of the bottoms of the inner steel pipes are connected through four steel sheets respectively, fiber reinforcement mortar layers are arranged between the top face of the bearing table and the end faces of the prefabricated assembly pier bodies as well as between the bottom face of the cover beam and the end faces of the prefabricated assembly pier bodies, the bearing table, the prefabricated assembly pier bodies and the cover beam are assembled through prestress tension device to form a whole, and the four viscous dampers are arranged between the top face of the bearing table and the side faces of the prefabricated assembly pier bodies as well as between the bottom face of the cover beam and the side faces of the prefabricated assembly pier bodies. The piers have the advantages that the construction quality is improved, the construction speed is increased, the site operation amount is reduced, and the impact on the environment is reduced; the viscous dampers provide additional energy-consuming abilities for the piers, and therefore the displacement requirement of the piers under horizontal load effects of earthquakes and the like can be controlled and reduced.

Description

technical field [0001] The invention relates to a design method for a prefabricated assembled bridge pier filled with concrete and double-walled steel pipes, in particular to a design method for a prefabricated assembled bridge pier filled with double-walled steel pipes without bonding and post-tensioned prestressed concrete with additional dampers. Background technique [0002] At present, bridge structures generally adopt the construction method of pouring concrete on site. This construction method has the disadvantages of long concrete site maintenance period, large site workload, noise and waste pollution to the surrounding environment, and easy traffic congestion. In order to alleviate these problems, precast concrete construction methods are increasingly used. [0003] Prefabricated concrete bridge components are manufactured and processed in the factory. Modern construction technologies such as automatic formwork and steam curing can be used to improve construction ac...

AI Technical Summary

Problems solved by technology

At the same time, prefabricated concrete piers require high manufacturing precision. Ordinary concrete prefabricated bridge piers are not easy to assemble due to low manufacturing precision, and the splicing gap on the joint surface is large, which reduces the horizontal bearing capacity of the bridge piers.

Images