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Classification of Weathering in Rocks and Its Engineering Implications- Juniper Publishers

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Juniper Publishers- Journal of Civil Engineering Abstract A critical review on the description and classification of weathering in rocks has been presented in this paper. This paper starts with a brief description on several factors causing weathering in rocks followed by the weathering mechanism and the description of weathering in rocks. A review of existing codes and guidelines on weathering and its implications to describe the engineering properties of rocks has been presented. From the point of view that weathering process modify the mass engineering properties of rocks which are quite unpredictable, this type of review work becomes necessary. The present paper forms a useful source of information for geologists and geotechnical engineers working on weathered rocks. Keywords: Rock; Weathering; Classification; Guidelines; Engineering properties Introduction Weathering of rocks is a purely subjective term and i...
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Designing Steel Bridges against Fire Hazard- Juniper Publishers

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Juniper Publishers- Journal of Civil Engineering Abstract Bridge fires can lead to significant economic and public losses; however, no provisions are specified for fire resistance of bridge structural members in current codes and standards. This paper presents an approach for mitigating fire hazard in steel bridges. The approach comprises of two steps, estimating fire risk in a bridge, and then developing strategies for enhancing fire resistance of a critical bridge. An analytical procedure is employed to derive a fire-based importance factor to estimate the vulnerability of a bridge to fire, and then a sequential finite element analysis is carried out to develop strategies for mitigating fire hazard in that bridge. The validity and applicability of this approach is demonstrated through a case study on a steel bridge that experienced fire recently. Keywords: Fire hazard; Bridges; Fire; Mitigation strategies; Finite element analysis ...
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Improving Railroad Safety with Risk Management-Juniper Publishers

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Juniper Publishers -Journal of Civil Engineering Perspective Railroad safety and the prevention of derailments remain a major concern of railroads worldwide. As railroads continue to work to reduce derailments, a new generation of innovative risk management techniques have been introduced to help railroads locate and identify potential derailment sites as well as improve inspection procedures and schedules [ 1 - 5 ]. These new techniques focus on the derailment causes them and develop specific risk management tools that quantify and analyze the "risk" for each key derailment or accident area. This has led to the development of risk based tools to identify high risk locations in the track and provide guidance for improved inspection and/or preventive maintenance to reduce that level of risk. For example, track caused derailments represent one of the largest derailment categories both in US and worldwide. In the US, it represents approximately 30% of al...
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