Connecting joint of prefabricated steel pipe restraining reinforced concrete pier and bearing platform

Abstract

The invention provides a connecting joint of a prefabricated steel pipe restraining reinforced concrete pier and a bearing platform and a construction method thereof. The connecting joint connects a prefabricated bridge pier and a bearing platform. The prefabricated bridge pier includes a steel pipe joint, an upper steel pipe and concrete. The steel pipe joint includes a lower steel pipe, a perforated steel plate and a connecting steel plate. The upper steel pipe is arranged above the lower steel pipe. The construction method of the connecting joint includes manufacturing a steel pipe joint, arranging longitudinal steel bars, pouring bridge pier concrete, hoisting a prefabricated pier and pouring filling concrete and the like. The connecting joint simplifies the formwork process. The construction speed is fast. The construction quality is improved. The construction environment is improved. The labor cost and the construction cost are saved. The bearing capacity of the connecting jointof the prefabricated pier and the bearing platform is improved on the basis of ensuring that the outer-wrapped steel pipe does not bear vertical load and greater lateral binding force on the core concrete is provided.

Description

technical field [0001] The invention relates to the technical field of bridge components, in particular to a connection node between a bridge pier and a cap. Background technique [0002] The steel pipe confined concrete structure has the advantages of high bearing capacity, superior earthquake resistance and fire resistance, and can make full use of high-strength steel and concrete compressive strength. When the steel pipe restrains the reinforced concrete column and the outsourcing steel pipe is circular, the steel pipe restrains the core concrete uniformly, the tensile strength of the steel pipe can be fully utilized, and the economic benefit is good. [0003] With the sharp increase in traffic volume and the increase in the service life of basic transportation facilities, steel pipe-confined concrete piers have been widely used in building structures. However, in the prior art, the joints between the prefabricated steel pipe-constrained reinforced concrete piers and the...

AI Technical Summary

Problems solved by technology

However, in the prior art, the joints between prefabricated steel pipe-constrained reinforced concrete piers and caps often have a risk of damage due to insufficient bearing capacity and stiffness.

Under the action of a relatively destructive strong earthquake, if the joint stiffness between the prefabricated pier and the cap is insufficient, the top and bottom of the pier will have a large displacement, which will form eccentric compression on the pier, and then increase under the gravity of the bridge superstructure. Eccentricity, which may lead to damage and collapse of pier in severe cases

Insufficient bearing capacity will cause the node to be damaged and form a plastic hinge, which is extremely unfavorable to structural safety.

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