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(3) Displacement of the foundation (4) Total displacement of the pier head Figure 6.18 - Example of the determination of equivalent longitudinal stiffness at bearings - resistance of the track or the rails against longitudinal displacement considering either - resistance against displacement of the track (rails and sleepers) in the ballast relative to the underside of the ballast, or - resistance against displacement of the rails from rail fastenings and supports e.g. with frozen ballast or...

Vertical Effects Of Nosing

A 0,5 x (LM71+SW 0) instead of (LM71+SW 0) where vertical traffic actions favourable. b Valid for heavy freight traffic limited to a maximum speed of 120 km h. c a 1 to avoid double counting the reduction in mass of train with f d See 6.5.1(3) regarding vertical effects of centrifugal loading. Vertical load effect of centrifugal loading less any reduction due to cant should be enhanced by the relevant dynamic factor. When determining the vertical effect of centrifugal force, factor f to be...

Info

Ampaian Kain

The details of Load Model 1 are illustrated in Figure 4.2 a. The details of Load Model 1 are illustrated in Figure 4.2 a. Qi Qi Gik qi ik Qi Qi Gik qi ik (1) Lane Nr. 1 Q1k 300 kN q1k 9 kN m2 (2) Lane Nr. 2 Q2k 200 kN q2k 2,5 kN m2 (3) Lane Nr. 3 Q3k 100 kN q3k 2,5 kN m2 * For wj 3,00 m Figure 4.2a - Application of load Model 1 NOTE The application of 4.2.4-(2) and 4.3.2-(1) to (4) practically consists, for this model, of choosing the locations of the numbered lanes and the locations of the...

Traffic Loads On Bridges

Compound Microscope Ray Diagram Easy

(2) For any combination of traffic loads together with actions specified in other Parts of EN 1991, any such group should be considered as one action. NOTE For the individual components of the traffic loads on footbridges, the other representative values are defined in EN 1990, A2. 5.6 Actions for accidental design situations for footbridges - road traffic under the bridge (i.e. collision) or - the accidental presence of a heavy vehicle on the bridge. NOTE Other collision forces (see 2.3) may...

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Arema Centrifugal Force Bridges

Maximum permissible expansion length Influence length of the loaded part of curved track determinant length (length associated with ( ) Longitudinal forces acting along the centreline of the track Longitudinal forces acting along the centreline of the track M Number of point forces in a train N Number of regularly repeating coaches or vehicles, or number of axles, or number of equal point forces P Point force Individual axle load Q Concentrated force or variable action (general) QAid Point load...

Section Actions on footways cycle tracks and footbridges

1 Load models defined in this section are applicable to footways, cycle tracks and footbridges. 2 The uniformly distributed load qfk defined in 5.3.2.1 and the concentrated load Qwk defined in 5.3.2.2 should be used for road and railway bridges as well as for footbridges, where relevant see 4.5, 4.7.3 and 6.3.6.2 1 . All other variable actions and actions for accidental design situations defined in this section are intended only for footbridges. NOTE 1 For loads on access steps, see 6.3 in EN...

Dispersal Of Load Through Backfill Curocode

The horizontal force, acting transversely, may be applied 100 mm below the top of the selected vehicle restraint system or 1,0 m above the level of the carriageway or footway, whichever is the lower, and on a line 0,5 m long. NOTE 2 The values of the horizontal forces given for the classes A to D derive from measurements during collision tests on real vehicle restraint systems used for bridges. There is no direct correlation between these values and performance classes of vehicle restraint...