Analysis and Assessment of Fatigue Response of Multilayer Asphalt Surfacing System on Orthotropic Steel Deck Bridge With the Five-Point Bending Beam Tests PDF Download

Author: X. Liu
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 13

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Book Description
The French five-point bending (5PB) beam test provides a laboratory scale test that allows studying the fatigue resistance of surfacing systems on orthotropic steel deck bridges (OSDB). The surfacing structure for OSDB in the Netherlands consists mostly of a multilayer system: top porous asphalt layer, Guss asphalt layer, steel deck, and two membrane layers between the asphalt surfacing layers. In this paper, the 5PB beam test was employed to evaluate the performance of the whole multilayer structure on a steel deck and also to evaluate the mechanical properties of both the top and bottom membrane and the influence they have on the structure. Four membrane products were used as the top and bottom membrane layers in the 5PB beams. Furthermore, in the last part of this paper, the dissipated energy was used to explain the incremental damage during the testing.

Author: Guodong Zeng
Publisher:
ISBN:
Category : Pavements, Asphalt
Languages : en
Pages : 19

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Book Description
A composite structural system consisting of an orthotropic steel bridge deck, waterproof prime, binding course, and wearing surface is complicated. To simplify the analysis of such systems, general elastic and continuous structure theory is applied to the asphalt pavement on steel bridge decks to determine the magnitude of the strain. Large differences in mechanical results have been previously obtained in assessments of steel bridge deck pavements. Few studies have focused on the mechanical state and time-dependent response of a realistic steel bridge deck wearing surface because of the difficulty of measuring the strain of the pavement on a steel deck of a long-span bridge that is in service. This study performed static and dynamic loading tests on an actual long-span steel bridge and analyzed the characteristics of the time-dependent strain response of the bridge deck wearing surface. The results demonstrate that the asphalt wearing surface exhibited significant loading time and rate-dependent characteristics under both static and dynamic loading conditions. The test analysis results also revealed that the axle load, vehicle speed, and longitudinal slope of the bridge had significant effects on the mechanical responses of the bridge deck wearing surface. Based on a comparison between the finite element numerical simulation results and the measurements obtained from testing the actual bridge, the magnitudes of the mechanical strain responses of the wearing surface on a steel bridge deck under the dynamic wheel load of a vehicle were analyzed assuming that the wearing surface is elastic and that the elastic modulus can be determined from a four-point bending test. However, the cumulative effect of plastic deformation must be considered when analyzing the fatigue damage of a permanent wearing surface.

Author: Ravi Sankar Chamarthi
Publisher:
ISBN:
Category : Electronic Dissertations
Languages : en
Pages : 162

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Book Description
Performance under static and fatigue loads are evaluated for two different wearing surfaces for possible use on the steel orthotropic deck of San Mateo Hayward Bridge in the bay area of California. The two wearing surface materials studied include a 2" thick (nominal) premixed polyester concrete (PC) and a 2" thick (nominal) epoxy asphalt concrete (EAC). Flexural specimens that comprise a "steel-plate - wearing surface" composite simulating the surfacing system and geometry specific to the orthotropic steel deck of the San Mateo Hayward Bridge are used for the static and fatigue tests. Flexural tests were conducted at different dynamic loading frequencies (0.0167, 1.0, 2.5, 5.0, 7.5, 10.0 and 15.0 Hz) and at several different temperatures (20.°F- 120°F) to study the temperature dependency and loading rate effects. Following these tests, the fatigue tests were conducted on replicate EAC and PC composite specimens at each of room (70°F), cold (32°F) and hot (120°F) temperatures. Both wearing surface systems performed well at the cold temperatures, surviving 10 million fatigue cycles. Both wearing surfaces experienced cracking at the room and hot temperatures prior to 10 million cycles and these cracks did not result in wearing surface delamination or local debonding. The comparative study in this exhaustive laboratory investigation has shown that the 2" thick PC material could perform equally well as the original EAC wearing surface existing on San Mateo Hayward Bridge.

Author:
Publisher: Strategic Highway Research Program (Shrp)
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 344

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Book Description
The development process included a number of phases, which are described in the report. Included in this report are the following: 1) a state-of-knowledge review for fatigue response of asphalt aggregate mixes, 2) a description of a pilot test program and its results, 3) a description of an expanded test program using the equipment and methodology selected in the pilot test program, and 4) a description of a mix analysis and design system, which can be used to mitigate fatigue cracking.

Author: Mark Douglas Bowman
Publisher: Transportation Research Board
ISBN: 030925826X
Category : Technology & Engineering
Languages : en
Pages : 125

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Book Description
"TRB's National Cooperative Highway Research Program (NCHRP) Report 721: Fatigue Evaluation of Steel Bridges provides proposed revisions to Section 7--Fatigue Evaluation of Steel Bridges of the American Association of State Highway and Transportation Officials Manual for Bridge Evaluation with detailed examples of the application of the proposed revisions."--Publisher's description.

Author: Bin Chen
Publisher:
ISBN:
Category : Steel plate deck bridges
Languages : en
Pages : 13

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Book Description
This study has introduced a method for fatigue performance evaluation of steel orthotropic bridge decks based on filed measurements for hotspot stress. The long-term stress of the orthotropic bridge deck of Jinchang Road Canal Bridge in Hangzhou, China, was observed by sensors. The fatigue damage and fatigue reliability of the bridge deck were analyzed and evaluated according to the stress. The results show that: (a) the fatigue life of the bridge deck is larger than the design value, indicating that the design of the orthotropic bridge deck is reasonable; (b) the fatigue loads acting at three hotspots can be described by normal distribution; and (c) for the current traffic volume, the fatigue reliability index of the three hotspots is greater than two in the design period. The fatigue reliability index of the three hotspots decreases significantly with the increase of traffic flow, at which time the fatigue damage becomes considerable.

Author: Soham Mukherjee
Publisher:
ISBN: 9781339483436
Category :
Languages : en
Pages : 301

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Book Description
The fatigue testing was run-out at 8 million cycles without any detectable fatigue cracking in the deck. The measured stress ranges at all critical connections were less than the CAFT of their respective detail categories. The test results would indicate infinite life performance of the rib-to-floor beam connection detail of the proposed deck design, as long as the site specific overloads do not exceed the AASHTO Fatigue I limit state load more than 1 in 10000 occurrences. The test results also demonstrated that the large deviation from the specified fabrication tolerances and the rejected welding procedures, which were noted during the specimen fabrication and installation, did not affect the fatigue resistance of the connection details. This suggests that the specified fabrication tolerances are arbitrary. In addition, the study provided critical information on issues related to fabrication and installation of the proposed orthotropic deck design for the lift bridge.

Author: Aksel Seitllari
Publisher:
ISBN:
Category : Asphalt
Languages : en
Pages : 151

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Book Description
Fatigue cracking is one of the critical distress modes in asphalt pavements. Accurate prediction and evaluation of fatigue performance are crucial to extending the service life of asphalt mixtures. Naturally, laboratory testing methods for fatigue characterization are time-consuming and require sophisticated procedures. Any effort to improve the speed and quality of the information gained from laboratory fatigue tests is valuable. This research work presents the results of a study investigating the possibility of implementing a new approach to characterize asphalt mixture fatigue behavior. This new approach includes cyclic tests run on cylindrical asphalt specimens in three-point beam mode (herein referred to as three-point bending cylinder (3PBC) geometry). Timoshenko beam theory along with the viscoelastic continuum damage (VECD) theory was implemented to model the mechanical response of the specimens. An excellent correlation between the results of 3PBC tests and uniaxial push-pull fatigue tests were observed. The 3PBC setup possesses the most advantages of uniaxial push-pull tests and includes more advantages such as not requiring a saw to cut the ends of the sample, not requiring gluing operation (and the gluing jig) and the possibility of estimating Poisson's ratio from the data. The proposed 3PBC approach was evaluated through laboratory tests conducted on various asphalt mixtures with varying binder types, mix components, and volumetric properties. The approach proposed herein was validated through finite element analysis. In addition, ruggedness evaluation of the 3PBC testing approach through varying factors and their levels were investigated and presented.

Author: Xiu Liu
Publisher:
ISBN:
Category : Bending fatigue
Languages : en
Pages : 12

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Book Description
Bridge deck pavement layers are prone to bending fatigue and shear failure because of the continuous vibration, the vertical instant impact, and horizontal dynamic shear effect from vehicles onto the pavement system. To ensure the durability of pavement systems, a typical pavement system on a steel bridge was studied through numerical simulation and laboratory tests. The maximum tensile stress at the bottom layer and the maximum interlayer shear stress of bridge deck pavement were obtained under different loading conditions in numerical simulations. Then direct shear tests were conducted to study the fatigue characteristics of bridge deck pavement materials and structure. Finally, the fatigue resistance of the asphalt pavement system was investigated under the typical traffic level in the northeast of China. This study is helpful to design steel bridge deck pavement systems with good bending fatigue and shear resistance.

Author: Transport and Road Research Laboratory
Publisher:
ISBN:
Category : Civil engineering
Languages : en
Pages :

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