Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A rapid repair method for reinforced concrete bridge piers after earthquakes

A reinforced concrete and repair method technology, applied in bridge maintenance, bridge, bridge construction and other directions, can solve the problems of not meeting the requirements of rapid traffic lifeline after earthquakes, reinforced concrete piers being easily damaged, and affecting the development of emergency rescue work, etc. Achieve good self-reset ability, increase durability and reduce residual deformation

Active Publication Date: 2021-03-02
INST OF DISASTER PREVENTION
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, there are very few researches on post-earthquake repair technology of bridge piers at home and abroad, and there are the following problems: 1. The repaired bridge piers have weak earthquake resistance and are prone to more serious damage in the next earthquake
2 It takes a long time to repair the bridge pier, which does not meet the requirements of rapid traffic lifeline after the earthquake
3 The bridge piers after restoration have poor durability and become temporary buildings, which need to be demolished and rebuilt shortly after restoration
[0004] Based on the above background, reinforced concrete bridge piers are prone to damage under strong earthquakes, which seriously affects the development of emergency rescue work after the earthquake.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A rapid repair method for reinforced concrete bridge piers after earthquakes
  • A rapid repair method for reinforced concrete bridge piers after earthquakes
  • A rapid repair method for reinforced concrete bridge piers after earthquakes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] As shown in the figure, a rapid repair method for reinforced concrete bridge piers after earthquakes mainly consists of cap 1, bridge piers 2, high-fluidity early-strength cement mortar 3, stainless steel casing 4, energy-dissipating angle steel 5, SMA combined ring spring 6, The horizontal screw rod 7-1, the vertical screw rod 7-2, the high-strength bolt 8, the longitudinal reinforcement 9, and the polytetrafluoroethylene film 10 are composed.

[0034] The SMA combined ring spring 6 is composed of an SMA outer ring 12 and an inner ring which are engaged with each other. The SMA outer ring 12 is made of nickel-titanium alloy, and the inner ring is made of high-strength steel with a yield strength of 500-1000 MPa. Both the SMA outer ring 12 and the inner ring are annular, and are used alternately from top to bottom. The inner ring surface of the SMA outer ring 12 is in contact with the outer ring surface of the inner ring and fastened with each other, and the inner ring...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a quick repair method for a reinforced concrete bridge pier after an earthquake, which belongs to the field of civil engineering. It is composed of caps, piers, high-fluidity early-strength cement mortar, stainless steel casing, energy-dissipating angle steel, SMA combined ring spring, horizontal screw, vertical screw, high-strength bolts, longitudinal reinforcement, and PTFE film. The idea of ​​this method is to change the pier consolidated at the bottom of the original pier into a swinging pier. When repairing, first remove the damaged concrete, and cut off the longitudinal reinforcement in the plastic hinge area at the bottom of the pier. The plastic hinge area is outsourced with stainless steel sleeves and filled with high-fluidity early-strength cement mortar in the sleeves. The energy-dissipating angle steel and the SMA combined ring spring form the external energy-dissipating system. The construction operation of this method is simple and the required time is short, and the repaired bridge pier becomes a swing system, which avoids re-damage of the repaired bridge pier under strong earthquakes. The stainless steel casing significantly improved the durability of the repaired piers. The external energy consumption system has a self-resetting function, which avoids the damage of the angle steel and is easy to repair.

Description

technical field [0001] The invention relates to a post-earthquake repaired reinforced concrete bridge pier, in particular to a post-earthquake repaired reinforced concrete bridge pier based on a swaying force mechanism and an external energy dissipation device. Background technique [0002] Reinforced concrete bridge piers are the main anti-lateral force components of bridge engineering. The earthquake damage of previous major earthquakes at home and abroad shows that reinforced concrete bridge piers are easily damaged under strong earthquakes, which will not only cause serious economic losses and casualties, but also seriously affect The timely development of disaster relief work after the earthquake has aggravated the earthquake disaster. [0003] Quickly repairing the damaged bridge piers after the earthquake can not only save the cost of repairing and rebuilding, but more importantly, quickly restore the traffic lifeline project and ensure the timely development of emerg...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): E01D22/00E01D19/02
CPCE01D19/02E01D22/00
Inventor 孙治国杨葆洋刘晓奎刘瑜丽
Owner INST OF DISASTER PREVENTION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products