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Vibration analysis of bridges under moving vehicles and trains程遠勝, Cheng, Yuansheng. January 2000 (has links)
published_or_final_version / Civil Engineering / Doctoral / Doctor of Philosophy
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EFFECTS OF TIRE INFLATION PRESSURE ON STRESSES IN PAVEMENTS.Akoko, Yacinthe François. January 1984 (has links)
No description available.
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Identification of dynamic load and vehicle parameters based on bridge dynamic responses姜瑞娟, Jiang, Ruijuan. January 2003 (has links)
published_or_final_version / Civil Engineering / Doctoral / Doctor of Philosophy
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Wheel load equivalencies for flexible pavementsOrozco Zepeda, Jose de Jesus January 1981 (has links)
No description available.
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Dynamic response of skeived girder bridges to moving loads.Eka, U. J. U. January 1971 (has links)
No description available.
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Dynamic response of skeived girder bridges to moving loads.Eka, U. J. U. January 1971 (has links)
No description available.
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Stiffness characterization and life cycle analysis of reinforced asphalt pavements using falling weight deflectometer testsUnknown Date (has links)
The western and northern parts of South Florida have shallow layers of organic and plastic soils under existing roads. These roads often exhibit large amount of cracking and distortion in a short period of time. Traditional repairs are often not practical due to high costs and extended construction time. In an effort to develop rehabilitation strategies that could be strictly applied to the surface layer, a pilot test site was selected along the alignment of SR 15/US 98 in northwest Palm Beach County, where severe pavement distresses were observed due to the presence of thick organic layers. PaveTrac MT-1, GlasGrid 8501, PetroGrid 4582, and ARMI were used as promising asphalt reinforcing products in 24 experimental pavement sections, including 8 control sections without any reinforcement. A comprehensive field testing and monitoring program involving FWD, rut and ride quality measurements was conducted at the preconstruction, 6-month post-construction, and 18-month post-construction stages. Due to large variability in the sub-surface conditions, a statistics-based data analysis protocol was developed for performance evaluation and relative comparisons of the test sections and, in turn, reinforcing products. Post construction data from both 6 months and 18 months demonstrated that stiffness of reinforced sections were significantly higher than the control sections. Procedures were developed to identify and statistically quantify the benefits derived from the reinforcements only, so that the relative performance of various products could be monitored over time. Based on the field testing data available to date, a framework was developed in this study for the prediction of pavement life, which is essential for conducting a detailed Life Cycle Analysis / by Alex Lima-Arie. / Thesis (M.S.C.S.)--Florida Atlantic University, 2010. / Includes bibliography. / Electronic reproduction. Boca Raton, Fla., 2010. Mode of access: World Wide Web.
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Computer modelling of multiple tee-beam bridgesPircher, Georg, University of Western Sydney, College of Health and Science, School of Engineering January 2006 (has links)
Bridges consisting of multiple parallel pre-stressed and pre-fabricated Tee-beams topped by a cast-on-site concrete slab are often a cost-effective way of constructing simply-supported and multi-span bridge structures in many countries world-wide. For the design of these bridges computer models are often utilised. This thesis presents a comprehensive discussion of modelling issues encountered in the practical design work on this bridge type. A chapter on the modelling of various loading conditions is followed by a detailed discussion of the modelling of the longitudinal load bearing system, the Tee-beams, and the lateral load-bearing system, the roadway slab. A summary of commonly used bridge systems in various countries is also included. All this material is presented considering design code requirements in various internationally used specifications. The information included in this thesis has been used to define specifications for the implementation of a software tool to support the design of so-called Super-Tee bridges. A summary of these specifications is given in the conclusions of this thesis. Material included in this thesis has also been published in the following conference proceedings: Pircher G., Pircher M. (2004) “Computer-aided design and analysis of multiple Tee-beam bridges”, Proceedings: Fifth Austroads Bridge Conference, Hobart, Australia, on CD Pircher M, Pircher G, Wheeler A (2006) “Automated Analysis and Design of Super-Tee Bridges”, Proceedings: Sixth Austroads Bridge Conference, Perth (in publication) / Master of Engineering (Hons)
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Analysis of conventionally reinforced concrete deck girder bridges for shearPotisuk, Tanarat 25 August 2004 (has links)
Large numbers of 1950's vintage conventionally reinforced concrete (CRC)
bridges remain in-service in the national bridge inventory. Many of these bridges are
lightly reinforced for shear. Evaluation of these bridges to prevent unnecessary and
costly repairs requires refined analytical techniques. This dissertation presents finite
element (FE) modeling and comparisons of various analytical methods for predicting
capacity of CRC girders typical of reinforced concrete deck girder (RCDG) bridges.
Analyses included bridge-system load distribution, member capacity prediction, and
consideration of corrosion damage for strength deterioration.
Two in-service RCDG bridges were inspected and instrumented to measure
response under known load configurations. Load distribution was developed for the
bridges based on the field data. Comparisons with AASHTO factors indicated the
design factors for load distribution are conservative. Load distribution of the tested
bridges was numerically obtained using FE analysis. The comparisons between
predicted results and field-test data indicated the elastic FE analysis can be used for
modeling of cracked RCDG bridges to predict load distribution factors for more
accurate bridge evaluation.
Analyses were performed for a large set of full-size RCDG, designed to
reflect 1950's vintage details, and tested using various loading configurations. Four
different analysis methods were used to predict the capacity of the specimens
considering details of various stirrup spacing, debonded stirrups, flexural-bar cutoff,
anchorage of flexural reinforcing, and moving supports.
Nonlinear FE analyses were performed to predict behavior of two groups of
experimental reinforced concrete (RC) specimens. Two different span-to-depth
ratios were included: 2.0 and approximately 3.0. Concrete confinement effects were
included in the material modeling. A quasi-displacement control technique was
developed to reduce solution times. The FE predicted results correlated well with
the experimental data.
FE modeling techniques were developed to isolate different contributions of
corrosion damage to structural response of experimental RC beams designed to
produce diagonal-tension failures. Corrosion-damage parameters included concrete
cover spalling; uniform stirrup cross-sectional loss; local stirrup cross-sectional loss
due to pitting; and debonding of corrosion-damaged stirrups from the concrete. FE
analyses were performed including both individual and combined damages. The FE
results matched experimental results well and quantitatively estimated capacity
reduction of the experimental specimens. / Graduation date: 2005 / Best scan available.
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Analysis, testing, and load rating of historic steel truss bridge decksBowen, Charles Merrill 28 August 2008 (has links)
Not available / text
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