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Aug 2, 2013 · L/v ratios. The tendency to derail is often described by the L/V ratio, where L is the lateral force and V is the vertical force at the wheel-track interface, as shown in Figure 7.6.
Jul 14, 2023 · For this reason, this paper presents a comprehensive review of existing studies on train post-derailment behaviours, encompassing various topics such as post-derailment contact–impact models, dynamic modelling and simulation techniques, and the primary factors influencing post-derailment behaviours.
Derailment at underline structures and embankments. As previously mentioned, the British Standards and RSSB guidance provides information on the key parameters to be considered within the bridge design. For underline structures, they should be able to resist derailment and support a derailed train.
The main quantities needed are the vertical wheel forces marked Q, the lateral wheel forces marked Y and their ratio Y/Q, which expresses the important quantity, i.e., the derailment quotient.
fire exposure curves, and implementing heat transfer and structural response analyses for the structural fire-resistant design of concrete and steel structures. The best practice guidelines document is intended to be a technical resource that provides the most complete information for structural fire-resistant design at present.
Aug 13, 2018 · The simulations demonstrate that the guard rail can reduce the train derailment potential caused by a sharp curve and overspeed. The lateral clearance between wheel rim back and guard rail, as well as the height over the low rail top, is crucial in the effectiveness of guard rail.
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The UL Guide Information for Fire-resistance Ratings – ANSI/UL 263 states: “Unless otherwise detailed in the individual designs, mastic and intumescent coatings are tested without any covering adjacent to the tested member that might interfere with the expansion of the coating.
