Dynamic Analysis for Steel Bridge Deck Thin Surfacing with Cracks

In order to improve the design method for resisting crack, this paper analyzed the dynamic characteristics of steel deck asphalt thin surfacing with cracks. The model analysis and harmonic response analysis were included to the steel bridge deck thin surfacing. Impact coefficients were calculated with different load cases, road roughness and crack damage. The conclusions can provide a theoretical reference for the assessments of the dynamic failure and long-term performance of the steel bridge deck thin surfacing.

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Pavement Evaluation for ERS Steel Deck Pavement Using Accelerated Loading Test

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.744.97 ◽

2017 ◽

Vol 744 ◽

pp. 97-104

Author(s):

Fei Chen ◽

Ke Zhong ◽

Xiao Hao Wei

Keyword(s):

Steel Bridge ◽

Loading Test ◽

Pavement Evaluation ◽

Loading System ◽

Loading Tests ◽

Pavement Structures ◽

Long Term Performance ◽

Term Performance ◽

Steel Deck

In order to verify the practical application of ERS steel deck pavement system, based on the project of Jia Shao bridge, the pavement accelerated loading system is used to test the long-term performance of the steel bridge deck pavement. Tests find that the absolute value of the average rut growth depth of ERS and ERN is less than 5mm when the number of axle loads is 2.05 million times. After more than 1.3 million loading tests, the two deck pavement structures are almost impermeable to water and their anti-skid properties also tend to be stable. The results show that ERS and ERN are not cracked under natural conditions and have excellent anti-rutting performance.

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Steel bridge long-term performance research technology framework and research progress

Advances in Structural Engineering ◽

10.1177/1369433216646005 ◽

2016 ◽

Vol 20 (1) ◽

pp. 51-68 ◽

Cited By ~ 3

Author(s):

Chunsheng Wang ◽

Lan Duan ◽

Musai Zhai ◽

Yuxiao Zhang ◽

Shichao Wang

Keyword(s):

Base Material ◽

Fatigue Performance ◽

Research Progress ◽

Steel Bridge ◽

Performance Study ◽

Research Technology ◽

Study Results ◽

Long Term Performance ◽

Term Performance

To ensure structural sustainability, it is necessary to conduct steel bridge long-term performance study, including bridge design, evaluation, maintenance, and reinforcement technology. The research on steel bridge long-term performance is introduced in four aspects: (1) fatigue performance experimental study for full-scale orthotropic steel bridge decks in laboratory to study its fatigue failure mechanism, in order to improve fatigue design methodology and find rational reinforcement and maintenance method; (2) conducting steel bridge out-of-plane distortion-induced fatigue performance study, and developing cold reinforcement method; (3) performance study for base material and typical joint under long-term vehicle and environmental effect in aging steel bridges, and safety assessment and maintenance of existing steel bridge; (4) temperature gradient monitoring for steel box girder model to build the temperature design mode. Meantime, in-situ tests and monitoring are conducted for steel bridge long-term performance detection, assessment, and maintenance. The study results in this article build the research framework of steel bridge long-term performance preliminarily, which is the basis for steel bridge sustainable design, maintenance, and cold reinforcement methodology system.

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Strain-Based Design Methods for Composite Repair Systems

2008 7th International Pipeline Conference, Volume 2 ◽

10.1115/ipc2008-64076 ◽

2008 ◽

Cited By ~ 3

Author(s):

Chris Alexander

Keyword(s):

Finite Element ◽

Composite Materials ◽

Design Method ◽

Design Methods ◽

Strain Gages ◽

Composite Repair ◽

Reinforced Steel ◽

Long Term Performance ◽

Term Performance

Composite materials are commonly used to repair corroded and mechanically-damaged pipelines. Most of these repairs are made on straight sections of pipe. However, from time to time repairs on complex geometries such as elbows, tees, and field bends are required. Conventional design methods for determining the amount of required composite materials are not conducive for these types of repairs. Over the past several years, the author has developed a methodology for assessing the level of reinforcement provided by composite materials to damaged pipelines using finite element methods. Instead of stress as the design basis metric, the method employs a strain-based design criteria that is ideally-suited for evaluating the level of reinforcement provided to non-standard pipe geometries. The finite element work has been validated using experimental methods that employed strain gages placed beneath the composite repair to quantify the level of reinforcement provided by the repair. This paper provides a detailed description of the strain-based design method along with appropriate design margins for both the reinforced steel and long-term performance of the composite materials.

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