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Line 31: =Irregular shaped bridges= In the UK arch shaped bridges can often be seen on waterways, whereas in Australia these types of structures are quite uncommon. Modelling an irregular/arch shaped bridges utilises the hydraulic properties elevation-width (CS/HW) type cross section. <br> 1. Create a 1d_tab HW (height vs width) .csv file for each standard shape (ie. set up a database of the egg-shapes). For the height value you can start at a value of zero so that height becomes depth (this might making the .csv files easier).▼ <br> 2. Any number of 1d_tab lines can reference the same .csv file, ie. you don't need to have a unique .csv file for every 1d_tab line. ▼ ;Methodology ▲1.# Create a 1d_tab HW (height vs width) .csv file for each standard shape (ie. set up a database of the egg-shapes). For the height value you can start at a value of zero so that height becomes depth (this might making the .csv files easier). ▲2.# Any number of 1d_tab lines can reference the same .csv file, ie. you don't need to have a unique .csv file for every 1d_tab line. 3. One option is to copy and paste the 1d_tab lines across each pipe (if you use a two vertex 1d_tab line there is no requirement that the 1d_tab line is snapped to the 1d_nwk pipe line - they just need to intersect). Each line will need to reference the relevant standard egg-shape HW .csv file (this could be automated using SQL Select if you have an attribute on the pipe to indicate which egg-shape it is).▼ ▲3.# One option is to copy and paste the 1d_tab lines across each pipe (if you use a two vertex 1d_tab line there is no requirement that the 1d_tab line is snapped to the 1d_nwk pipe line - they just need to intersect). Each line will need to reference the relevant standard egg-shape HW .csv file (this could be automated using SQL Select if you have an attribute on the pipe to indicate which egg-shape it is). 3. The inverts of the pipes should raise or lower the standard egg-shape cross-section to the appropriate height.▼ ▲3.# The inverts of the pipes should raise or lower the standard egg-shape cross-section to the appropriate height. <br>

1D Bridges: Difference between revisions