paxgrab.blogg.se - Midas civil distributed loads

Load Models 1 to 4 may be combined to form 'Groups' of traffic loads. GROUPS OF TRAFFIC LOADS (UK National Annex Table NA.3) The UK NA also applies this reduction to crowd loading on road bridges with loaded lengths greater than 30m.

Unless specified otherwise the ULD load may be reduced for footway/cycleway bridges with loaded lengths greater than 10m. The "frequent" value of LM1 is used and positioned in adjacent lanes and within 5m of the front and rear axles of the SV or SOV vehicle.Ī uniformly distributed load of 5kN/m 2 used to represent crowd loading and may be applied to both road bridges and footway/cycleway bridges.

Load Model 1 is applied in combination with the SV or SOV vehicle loading. Only one SV or SOV vehicle is applied to the structure. Motorways & Trunk Roads = SV80, SV100, SV196Įach axle of the SV and SOV vehicles has to be multiplied by a Dynamic Amplification Factor (DAF) which varies from 1.2 to 1.07 for axles loads from 100kN to 225kN respectively. Recommend that the levels of SV loading are as follows:

SV model vehicles (SV80, SV100 and SV196) are in accordance with the Special Types General Order (STGO) Regulations.

The UK National Annex describes two groups of vehicles, SV and SOV vehicles. If the structure is to be designed for abnormal loads then vehicles from Load Model 3 will need to be considered. Effects under one 200kN wheel load should also be considered.ģ. This load model is more predominant on short span members up to about 7m and includes members such as deck slabs spanning between main beams.

When the action is applied within 6m of an expansion joint then an additional dynamic amplification factor is applied. However, unlike the Dynamic Nodal Loads which are applied to a node directly into the Time History Load Case, here you will need to define a static load case for each independent UDL which you want to apply in the TH Analysis with a different time or magnitude.The UK use a 400kN axle load which includes a factor to allow for dynamic amplification effects. Yes, you can use the Time-Varying Static Loads to apply a UDL in the Time History Analysis. I found out that at Midas it is an option as 'Time-Varying Static Loads' and I would like to know if it is going to work the same way as 'Dynamic Nodal loads' I would like to make transverse distributions and apply load as line load (in the transverse direction). I would like to know if it is possible to apply another type of load for time history analysis. We would like to create a grillage mode for our bridge for time history analysis and I don't think that point load will be appropriate for this type of model. I have questions about time history analysis. We are currently working on a high-speed Railway Bridge project.