Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Railway bridges"”.
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Dynamics of prestressed concrete railway bridges
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
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Dynamic distributed monitoring of masonry railway bridges
… of complex structures, such as masonry arch bridges. These bridges, which are common features of many European transport networks, are often ageing structures, with complex histories of damage and repair work. Furthermore, their material properties and non-visible geometry may be challenging, …
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Identification of Vulnerable Zones on Steel Railway Bridges
… the static and dynamic analyses of steel railway bridges subjected to the action of moving trains on the Crocodile, Kalbaskraal, and Van Staden railway bridges located in the Western Cape. The parameters of the bridges were taken from the existing desktop information. Numerical simulations …
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Vibration of railway bridges in the audible frequency range
… means of predicting noise levels from proposed bridges, noise control<br/>measures for existing structures and principles of low-noise bridge design.<br/><br/>This thesis describes a programme of work in which an existing calculation model for bridge noise and vibration has been tested and …
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The calculation of noise from railway bridges and viaducts
… Limited are a designer and manufacturer of railway rail-fastening systems. As an organisation they have the capability to reduce the noise impact of bridges using resilient track components. They also have a commercial interest in providing such technology. Knowledge of the processes behind …
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The Lateral and Longitudinal Distribution of Loading in Steel Railway Bridges
Made available in DSpace on 2014-12-05T17:37:14Z (GMT). No. of bitstreams: 1 6100197.pdf: 4983892 bytes, checksum: ca3fb553cb1f5dfaeaa6f868907ba828 (MD5) Previous issue date: 1960
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A method for the fatigue evaluation of riveted steel girder railway bridges
… North America's aging infrastructure consists of railway bridges of riveted steel girder type construction. There is concern about this population of bridges because of the nature of today's current loading environment and the fact that many of these bridges will attain or exceed their projected …
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A numerical investigation of the dynamic behaviour of continuous, multi-span railway bridges
The dynamic behaviour of railway bridges has been investigated for over a century [Ichikawa et al., 2000]. With the introduction of high speed trains in recent history, a host of complex problems regarding resonance have been observed and studied. These studies, which include Bjorklund [2004]; …
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Vibration Energy Harvesting for the Development of autonomous monitoring Systems. Application to railway Bridges
… source for autonomous monitoring systems in railway infrastructure. The research focuses on the modelling, optimisation, and validation of piezoelectric (PEH) and magnetoelastic (MEH) energy harvesters, with particular emphasis on their application to railway bridges. Analytical …
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Autonomous vision-based inspection of RC railway bridges for rapid post-earthquake response and recovery
… inspection of reinforced concrete (RC) railway bridges to realize rapid post-earthquake response and recovery, which are crucial for minimizing the disruptions to people’s lives and business. Currently, after an earthquake, coarse preliminary structural assessment is performed based on …
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Analysis and comparison of the South African and Eurocode live load models for railway bridges
… (SATS) and Eurocode (EC) live load models for railway bridges. The study is specifically concerned with the critical load effects of shear and bending moment. The load models are simulated as moving loads over the full length of simply supported and continuous railway systems with speeds not …
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Track-Bridge Interaction Effects in Heavy Haul Railway Viaducts
… demand to increase freight haulage on heavy haul railway lines intensifying to meet mineral export demands, there is a need to understand the manifestation of rail bridge interactions in heavy haul railway bridges. Understanding the manifestation of these forces is critical for the management of …
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Risk-based bridge asset management
Bridges, critical components of a nation’s infrastructure network, are vulnerable to deterioration from aging, fatigue, and external events like earthquakes or impacts. These challenges, coupled with limited maintenance resources, create the need for efficient and expeditious predictive maintenance …
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Análise dinâmica de vigas de pontes pelo método dos elementos finitos - aplicação a vigas Gerber
The dynamic analysis of bridges is presented, being the bridge idealized as an elastic beam under the action of moving constant forces. Special emphasis is given to the dynamic behavior of cantilever bridges. The structure is discretized in finite elements and the analysis is conducted by means of …
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Assessing the economic value of using structural health monitoring systems on South African bridges by studying the Ermelo-Richards Bay Freight Railway line
… systems can be used in detecting overloading (on bridges for instance) and to alert asset managers of any due maintenance. Büyüköztürk (2007) argues that conventional methods of inspecting the condition of bridges are generally subjective and that this does not give a true reflection of the state …
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The Role of Tanzania Central Railway Line in Promoting Cargo Transportation
… study conducted to examine the role of central railway line in promoting cargo transportation in Tanzania. The emphasis was placed particularly on the volume of cargo transported for five years aiming to comprehend transportation needs, limiting challenges facing railway transportation and …
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Semplified seismic Vulnerability Assessment of Masonry Arch Bridges
… seismic vulnerability assessment of masonry arch bridges with common typologies in Europe. Bridges are, in most cases, the most vulnerable elements in the transportation network during an earthquake; therefore, their seismic vulnerability assessment is necessary for a proper planning of the …
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Vibration based assessment of Kalbaskraal rail bridge
… with vibration based assessment techniques for railway bridges. The methodology suggests a systematic visual assessment combined with the development of a finite element model which is calibrated by using modal parameters ascertained from vibration based testing. The bridge which was used as a …
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