Global ETD Search

1	WIM based live load model for bridge reliability Kozikowski, Marek. January 2009 (has links) Thesis (Ph.D.)--University of Nebraska-Lincoln, 2009. / Title from title screen (site viewed February 25, 2010). PDF text: ix, 363 p. : col. ill. ; 8 Mb. UMI publication number: AAT 3386590. Includes bibliographical references. Also available in microfilm and microfiche formats. Bridges Truck Load factor design.
2	Designação de rotas para frota dedicada em uma rede de distribuição de linha branca. / Assigning lanes to dedicated fleet in a white goods distribution network. Stringher, Fabiano Gadini 31 May 2004 (has links) Esta dissertação apresenta um problema de otimização relacionado com a designação de rotas de carga completa para frota própria ou dedicada, visando a minimização dos custos de transporte numa rede de distribuição formada por fábricas uni-produto, centros de distribuição (consolidação) e clientes. Essas rotas são conjugadas formando ciclos fechados (viagens) para garantir a otimização do tempo através do movimento contínuo desta frota dedicada. A metodologia é aplicada em uma rede de distribuição de um fabricante de linha branca no Brasil. Além dos resultados econômicos favoráveis, outras contribuições para o tema de conjugação de rotas foram encontradas nesta dissertação, tais como, a regra de formação de caminhos, o limite para conjugação de rotas numa rede de distribuição e o desenvolvimento de uma estrutura para custear esses caminhos conjugados. O modelo de programação linear inteira desenvolvido mostrou-se apto a resolver problemas de tamanho real em tempo factível, mesmo com recursos computacionais comuns. / This thesis presents an optimization problem regarding the assignment of truckload lanes to a private or dedicated fleet to minimize transportation costs in a distribution network formed by single-product plants, distribution (consolidation) centers and clients. These lanes are conjugated in order to form closed cycles (trips) to guarantee time optimization through continuous movement of this dedicated fleet. This methodology is applied to a distribution network of a white goods manufacturer in Brazil. More than good economic results, there are others contributions for the theme of conjugated lanes in this thesis, such as, the rule of formation trips, the limit to conjugated lanes to a distribution network and the development of a structure to get the conjugated lanes\' costs. The model of integer linear program that was development is capable to solve the real problems in a reasonable time, even if with regular. Linha branca Logistic Logística Operational research Pesquisa operacional Transporte carga lotação Truck Load White goods
3	Designação de rotas para frota dedicada em uma rede de distribuição de linha branca. / Assigning lanes to dedicated fleet in a white goods distribution network. Fabiano Gadini Stringher 31 May 2004 (has links) Esta dissertação apresenta um problema de otimização relacionado com a designação de rotas de carga completa para frota própria ou dedicada, visando a minimização dos custos de transporte numa rede de distribuição formada por fábricas uni-produto, centros de distribuição (consolidação) e clientes. Essas rotas são conjugadas formando ciclos fechados (viagens) para garantir a otimização do tempo através do movimento contínuo desta frota dedicada. A metodologia é aplicada em uma rede de distribuição de um fabricante de linha branca no Brasil. Além dos resultados econômicos favoráveis, outras contribuições para o tema de conjugação de rotas foram encontradas nesta dissertação, tais como, a regra de formação de caminhos, o limite para conjugação de rotas numa rede de distribuição e o desenvolvimento de uma estrutura para custear esses caminhos conjugados. O modelo de programação linear inteira desenvolvido mostrou-se apto a resolver problemas de tamanho real em tempo factível, mesmo com recursos computacionais comuns. / This thesis presents an optimization problem regarding the assignment of truckload lanes to a private or dedicated fleet to minimize transportation costs in a distribution network formed by single-product plants, distribution (consolidation) centers and clients. These lanes are conjugated in order to form closed cycles (trips) to guarantee time optimization through continuous movement of this dedicated fleet. This methodology is applied to a distribution network of a white goods manufacturer in Brazil. More than good economic results, there are others contributions for the theme of conjugated lanes in this thesis, such as, the rule of formation trips, the limit to conjugated lanes to a distribution network and the development of a structure to get the conjugated lanes\' costs. The model of integer linear program that was development is capable to solve the real problems in a reasonable time, even if with regular. Linha branca Logística Pesquisa operacional Transporte carga lotação Logistic Operational research Truck Load White goods
4	Nondestructive Load Testing and Experimental Load Rating of the Veteran's Glass City Skyway Feng, Xianan 09 September 2010 (has links) No description available. Civil Engineering VGCS Load testing Truck load test Experimental load rating
5	Response of Skewed Composite Adjacent Box Beam Bridge to Live and Environmental Load Conditions Mutashar, Rana O. 24 September 2020 (has links) No description available. Civil Engineering Transportation Engineering bridge thermal load skew bridge truck load early age live load distrbution factor adjacent box beam deck integral abutment finite element analysis field test
6	Ultra-High Performance Concrete Bridge Applications in Ohio Barnard, Elné 23 May 2022 (has links) No description available. Civil Engineering Ultra-High Performance Concrete UHPC Closure placement Box beam bridge Shear key Longitudinal crack Connection Dowel bar Joint Thermal load Temperature Field test Truck load Longitudinal Joint Deck panel system UHPC joints UHPC cost ABC, UHPC construction
7	Behavior of Adjacent Prestressed Concrete Box Beam Bridges Containing Ultra High Performance Concrete (UHPC) Longitudinal Joints Semendary, Ali A. 13 July 2018 (has links) No description available. Civil Engineering Box beam bridge Shear key Longitudinal crack UHPC Connection Dowel bar Truck load Thermal load Temperature Moment distribution factor Finite element modeling Field test Dynamic amplification factor
8	Response of concrete pavements under moving vehicular loads and environmental effects Darestani, Mostafa Yousefi January 2007 (has links) The need for modern transportation systems together with the high demand for sustainable pavements under applied loads have led to a great deal of research on concrete pavements worldwide. Development of finite element techniques enabled researchers to analyse the concrete pavement under a combination of axle group loadings and environmental effects. Consequently, mechanistic approaches for designing of concrete pavements were developed based on results of finite element analyses. However, unpredictable failure modes of concrete pavements associated with expensive maintenance and rehabilitation costs have led to the use of empiricalmechanistic approach in concrete pavement design. Despite progressive knowledge of concrete pavement behaviour under applied loads, concrete pavements still suffer from deterioration due to crack initiation and propagation, indicating the need for further research. Cracks can be related to fatigue of the concrete and/or erosion of materials in sub-layers. Although longitudinal, midedge and corner cracks are the most common damage modes in concrete pavements, Austroads method for concrete pavement design was developed based on traditional mid-edge bottom-up transverse cracking introduced by Packard and Tayabji (1985). Research presented in this thesis aims to address the most common fatigue related distresses in concrete pavements. It uses comprehensive finite element models and analyses to determine the structural behaviour of concrete pavements under vehicular loads and environmental effects. Results of this research are supported by laboratory tests and an experimental field test. Results of this research indicate that the induced tensile stresses within the concrete pavement are significantly affected by vehicle speed, differential temperature gradient and loss of moisture content. Subsequently, the interaction between the above mentioned factors and concrete damage modes are discussed. Typical dynamic amplifications of different axle groups are presented. A new fatigue test setup is also developed to take into consideration effects of pavement curvature on fatigue life of the concrete. Ultimately, results of the research presented in this thesis are employed to develop a new guide for designing concrete pavements with zero maintenance of fatigue damage. dynamic analysis dynamic amplification finite element analysis finite element model static analysis axle group loads critical axle group configuration critical position of axle groups tyre pavement interaction stress distribution fatigue failure concrete pavement distresses corner cracking longitudinal cracking transverse cracking top-down cracking bottom-up cracking boundary conditions debonding layer temperature effects loss of moisture contents shrinkage effects curling induced stress warping stress pavement curvature field test laboratory text experimental study truck load JPCP JRCP CRCP SAST SADT TAST TADT TRDT QADT

Search results