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

A method for modifying the aseismic importance coefficient of a bridge

An important and bridge technology, applied in the field of bridge seismic importance coefficient correction, can solve the problems of not considering the uniqueness of the post-disaster lifeline project, the economic angle is not completely reasonable, etc., to achieve the effect of ensuring reliability and improving economy

Active Publication Date: 2019-01-18
SHANDONG TRAFFIC PLANNING DESIGN INST +1
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] my country's "Seismic Design Rules for Highway Bridges" (JTG / T B02-01-2008), referred to as "08 Rules", considers the importance of seismic fortification of bridges based on the road grades and bridge spans where the bridges are located, and emphasizes road grades and repairs. The degree of difficulty, without comprehensive consideration of the post-disaster rescue mission undertaken by the road, without consideration of the uniqueness of the post-disaster lifeline project in the rescue work, from an economic point of view, it is incomplete to carry out seismic fortification for all bridges according to the same standard reasonable

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 method for modifying the aseismic importance coefficient of a bridge
  • A method for modifying the aseismic importance coefficient of a bridge
  • A method for modifying the aseismic importance coefficient of a bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The planning scheme of the newly built bridge is as follows: 60m+100m+60m expressway three-span continuous girder bridge, the highest pier height of the bridge is 22m, it is an important passage connecting town A and town B, a total of 6 bridges are designed for this road, and town A is planned There are 2 first-class roads and 3 second-class roads on the road with B town.

[0040] The bridge is a bridge on the expressway with a single-span span of no more than 150m, and belongs to Class B bridge. Under the action of E2 earthquake, its seismic importance coefficient Ci is taken as 1.3.

[0041] Determine the earthquake vulnerability evaluation index R1. The bridge belongs to a three-span continuous beam system with a maximum span of 100m. According to Table 1, the value of the girder bridge is found to be 0.97 when the span is 100m.

[0042] Determine the earthquake risk evaluation index R2. In this example, the highest pier height of the bridge is 22m, according to T...

example 2

[0047] The newly constructed bridge is a special-shaped arch-girder composite bridge. The design span adopts a three-span arrangement of 55m+85m+55m. The plane projection of the arch rib and the centerline of the main beam present an included angle of 25°.

[0048]The bridge is an unconventional architecture, and the seismic vulnerability of the structure is calculated first. Using the finite element software to analyze the fragility of the structure, it is obtained that the fragility curve of the most unfavorable stressed components of the bridge under earthquake action is similar to the fragility curve of the most unfavorable stressed components of the 130m-span conventional arch bridge. Therefore, it can be considered that the seismic vulnerability of the bridge is the same as that of the 130m-span arch bridge.

[0049] Seismic Vulnerability Evaluation Index of 130m Span Arch Bridge Correspondingly, the seismic vulnerability evaluation index R1 of the 55m+85m+55m three-sp...

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 relates to a method for modifying the aseismic importance coefficient of a bridge, which mainly considers four evaluation indexes, including an evaluation index R1 considering earthquakevulnerability, an evaluation index R2 considering earthquake risk, an evaluation index R3 considering bridge series connection and an evaluation index R4 considering road parallel connection. The seismic importance correction coefficient R is obtained by multiplying four evaluation indexes, R = R 1 * R 2 * R 3 * R 4. The modified seismic importance coefficient is obtained by multiplying the original seismic importance coefficient by the seismic importance correction coefficient R. The technical scheme of the invention can greatly improve the economy of the bridge design in the dense area of the road network, and has important practical significance.

Description

technical field [0001] The invention belongs to the field of civil engineering, and in particular relates to a method for correcting a bridge's anti-seismic importance coefficient. Background technique [0002] With the development of urban construction, the construction of transportation lines is getting faster and faster, and the transportation network is becoming more and more dense. It took 12 years for my country's expressways to open to traffic for 10,000 kilometers from 1988. Since the beginning of the 21st century, the construction of expressways has entered a stage of rapid development. From 10,000 kilometers to break through 20,000 kilometers, it took only 3 years for our country . As of 2015, the mileage of my country's expressways was 124,000 kilometers, and by 2020, the mileage of my country's expressways will reach 150,000 kilometers. [0003] The road transportation network is the lifeline for rescuing people's lives and properties, resuming production as soo...

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 Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/13
Inventor 李怀峰练强袁万城王笃文王宏博徐润张常勇党新志
Owner SHANDONG TRAFFIC PLANNING DESIGN INST
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com