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Cable restraint pier anti-seismic structure

An anti-seismic structure and cable technology, which is applied to bridges, bridge parts, bridge construction, etc., can solve problems such as increasing the area of ​​bridge piers and the amount of reinforcement, excessive displacement of pier tops, and damage to falling beams, so as to reduce project costs and Effects of pier and foundation internal forces, optimized sections and reinforcement

Inactive Publication Date: 2012-01-18
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this method: As the demand for earthquakes increases, it is necessary to continuously increase the cross-sectional area and reinforcement of the piers and foundations, especially for pile foundations, sometimes it is difficult to design to meet the requirements
When subjected to a large earthquake, the bridge pier may be in a plastic state, which will inevitably cause excessive displacement of the pier top, and there may be a possibility of falling beam damage

Method used

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  • Cable restraint pier anti-seismic structure
  • Cable restraint pier anti-seismic structure
  • Cable restraint pier anti-seismic structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Such as figure 1 , figure 2 and Figure 7 The shown a kind of cable-constrained pier seismic structure includes two pier 1 arranged in the longitudinal direction, left and right abutments 4, 5 located at the left and right ends, and supports on each of the pier 1 and left and right abutments 4, 5 The upper structure 2 on the bridge pier 1 is a single-column pier without a cover beam, and the first cables 3 are anchored and connected between adjacent piers 1, and the left and right abutments 4, 5 and The bridge piers 1 close to the left and right abutments 4, 5 are all anchored by the second cable 6, and the connecting ends of the first cable 3 and the second cable 6 are all anchored at the top of each of the bridge piers 1. The first cable 3 and the second cable 6 can be one cable anchored on each pier 1 and the left and right abutments 4, 5, or they can be segmented cables anchored to each pier 1a and the left and right abutments 4, 5 respectively between.

Embodiment 2

[0025] Such as image 3 , Figure 4 and Figure 7 A cable restrained pier seismic structure shown includes two pier 1 arranged longitudinally, left and right abutments 4, 5 located at the left and right ends, and supports on each of the pier 1 and left and right abutments 4, 5 The upper structure 2 of the pier 1 is a single-column pier composed of a pier body 1a and a cover beam 1b, wherein the cover beam 1b is fixed laterally on the upper end of the pier body 1a, and between adjacent cover beams 1b The first cables 3 are anchored and connected between them, and the left and right abutments 4, 5 are anchored by the second cables 6 between the left and right abutments 4, 5 and the cover beams 1b close to the left and right abutments 4, 5, and the first Both the connecting ends of the cables 3 and the second cables 6 are anchored on the respective cover beams 1b. The above-mentioned bridge piers are single-column piers, and the first cable 3 and the second cable 6 can be anch...

Embodiment 3

[0027] Such as Figure 5 , Figure 6 and Figure 7 A cable restrained pier seismic structure shown includes two vertically arranged pier 1, left and right abutments 4, 5 located at the left and right ends, and supports on each of the pier 1 and left and right abutments 4, 5 The upper structure 2 of the bridge pier 1 is a double-column pier composed of a pier body 1a and a cover beam 1b, wherein the cover beam 1b is longitudinally fixed on the upper ends of the two pier body 1a, and the adjacent cover beam 1b The first cables 3 are all anchored and connected between them, and the left and right abutments 4, 5 are anchored by the second cables 6 between the left and right abutments 4, 5 and the cover beam 1b close to the left and right abutments 4, 5. The first cables 3 and the second cables 6 are two groups, and the two groups of first cables 3 and second cables 6 are respectively fixed on each of the cover beams 1b above each of the piers 1a. The above-mentioned piers are d...

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Abstract

The invention discloses a cable restraint pier anti-seismic structure, which comprises at least one pier which is longitudinally arranged, a left bridge abutment and a right bridge abutment at the left end and the right end and a superstructure which is supported on the piers and the left and right bridge abutments, a first cable is connected between two adjacent piers, the left and right bridge abutments and the piers close to the left and right bridge abutments are all fixed by a second cable, and connecting ends of the first cable and the second cable are both connected in the upper part of the piers. The cable restraint pier anti-seismic structure has simple and novel structure and can solve the problems that the piers generate too large displacement under earthquakes which leads to the damage of the superstructure, the piers generate too large internal force at the bottom of the piers to be damaged under earthquakes, and a foundation generates too large interface force to be damaged under earthquakes.

Description

technical field [0001] The invention relates to a bridge structure, in particular to an anti-seismic structure of a cable-constrained bridge pier. Background technique [0002] China is located between two major seismic belts in the world—the circum-Pacific seismic belt and the Eurasian seismic belt. It is squeezed by the Pacific plate, the Indian plate and the Philippine Sea plate, and the seismic fault zone is very developed. China is a country severely affected by earthquakes with high frequency, high intensity, shallow focus and wide distribution. The Tangshan earthquake on July 28, 1976 and the Wenchuan earthquake on May 12, 2008 caused huge casualties and economic losses to our country. Bridge engineering is the throat of traffic lifeline, but it is also the highway building most prone to earthquake damage. In order to improve the seismic performance of bridges, researchers in the engineering field have been working hard for various research work for many years. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/02
Inventor 郑万山唐光武张又进张显明
Owner CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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