Method for reinforcing post-earthquake pier by fusing arc flanking column based on non-intensified damaged area

Abstract

The invention discloses a method for reinforcing post-earthquake pier by fusing arc flanking column based on non-intensified damaged area. The method comprises the following steps: 1, strengthening adamaged pier, removing the crushed concrete at the plastic hinge region, and cutting off seriously bulged and bent steel bars at the plastic hinge region, and pouring cement mortar; 2, connecting twohalf-circle steel hoops on an upper side of the plastic hinge region of the pier by utilizing bolts, and welding steel base plates on two sides of the bottom of the steel hoops; 3, welding two arc steel tubes to the steel base plates, and casting the concrete into the arc steel tubes, and connecting the arc flanking column with the steel hoops by using steel members; 4, arranging a high damp spring between the arc flanking column and the foundation, and filling the energy consumption material. Through the method disclosed by the invention, the problem that the anti-earthquake requirement cannot be met since the pier is insufficient in bearing capacity due to the bending and the curved-scissoring after the earthquake can be solved; the secondary damage on the structure can be reduced sincethe free rotation of the plastic hinge at the pier bottom is utilized by the reinforced pier under the earthquake effect; the fulcrum is deflected to form an eccentric resisting moment for the fulcrum, and the energy consumption material can play the effects of absorbing the shock and consuming the energy.

Description

technical field [0001] The invention relates to the field of anti-seismic reinforcement of bridge piers, in particular to a method for strengthening post-earthquake bridge piers based on fusion of arc-shaped wing columns in non-reinforced damaged areas. technical background [0002] my country is located between the Circum-Pacific Seismic Belt and the Eurasian Seismic Belt. It is one of the most seismically active regions in the continental region of the world. The seismic activity that occurs is characterized by high frequency, high intensity, shallow epicenter and wide distribution. Earthquake disasters in recent decades have caused a large number of casualties and damage or collapse of engineering structures; bridges, as the pivotal project of the lifeline of transportation, once damaged by an earthquake, will not only affect the normal life of the people, but also block the lifeline of earthquake relief. lead to huge economic losses. [0003] As the vertical load-bearin...

AI Technical Summary

Problems solved by technology

However, this reinforcement method, on the one hand, due to the damage inside the structure, it is difficult to determine the reinforcement increment, which is difficult and expensive to restore to the original initial state.

On the other hand, the anti-seismic mechanism of the structure has not changed, and the pier's own resistance is still used to deal with the strong external impact force, which will inevitably cause continuous damage in the later stage, and it is easy to fall into the vicious cycle of "damage-reinforcement-damage"

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