Detailed bridge design

00:03

We're going to be looking at creating custom

00:05

bridge parts and also some rebar detailing.

00:10

So we're going to begin by looking at how we can create a

00:13

bridge part using inventor.

00:16

So we need to start with a sketch of the peer profile and we do this in the XZ plane

00:22

and then simply trace the outline of the peer profile with the line tool.

00:26

We can do this freehand just by making sure that we are pointing

00:30

in the right direction and then entering a valley for the distance.

00:34

In this example,

00:35

we're going to use the mirror tool to

00:37

replicate the opposite side of the pier outline.

00:40

As far as dimensioning of the profile goes,

00:43

we are provided with some standard mentions,

00:46

but we will need to make changes to those and add some very specific

00:49

ones in order for this peer to work when it gets to info works.

00:55

So each category of part

00:57

that being abutments, peers foundations, et cetera

01:01

have a specific number of required parameters

01:05

which must be included in the model and must have the correct syntax. In order to work

01:10

these required parameters shown here in red

01:14

will be driven by Infra works,

01:16

the rest will be user driven and whatever is required to fully define the part.

01:20

In this case, uh appear,

01:25

we can make changes to existing dimensions by double clicking them

01:29

and changing the contents or add them using the dimensioning tools.

01:34

Always taking care to make sure that the syntax

01:37

is correct in the case of the required parameters.

01:40

And then just by adding

01:42

additional use dimensions to fully define the part

01:45

at this stage,

01:46

we also need to make sure that the part

01:48

will behave as expected when the dimensions change.

01:51

And this is taken care of by using constraints.

01:55

So as we were tracing the profile out

01:58

inventor was adding some constraints for us to make sure that lines

02:02

drawn at right angles for instance stay that way when dimensions change.

02:06

But on the mirrored side, there are some missing.

02:09

So we can add these using the constraint tools

02:12

to make sure everything stays as it should be

02:15

as the dimensions change.

02:17

When the part gets into infra works.

02:20

When the profile is completed,

02:22

we can close the sketch down and then use

02:24

the extrusion tools to actually create the part.

02:27

In

02:27

this case,

02:28

we will select a symmetrical extrusion to set

02:31

out the thickness from the center of the pier

02:34

and then label it with a parameter so that we

02:36

can adjust it when it gets into infra works.

02:39

All that is then left to do is to look at the parameter list.

02:42

And make sure that the parameters we need

02:44

are selected ready for export to Infra works

02:47

and then simply save the part

02:49

and it is ready for use.

02:52

Now, the other method of creating these parts is to use a rivet family.

02:57

So the first thing we need to do is to start

02:59

a new rit family and then just select a generate model

03:03

rev it will then present us with a number of views for us to start modeling in

03:07

the process of modeling. The part is different to the inventor method

03:11

in that we need to create a framework for the geometry first using reference planes.

03:18

So we just need to create a series of reference

03:20

planes that will replicate the critical dimensions of the part.

03:26

When that has all been arranged, we can then look at the actual dimensions.

03:34

So in this case, we will use an aligned dimension to identify the pier height.

03:40

If the dimension text is too small, we can adjust the scale

03:45

and then look to the labeling feature to

03:48

specify any parameter labels including our required parameters.

03:54

We need to continue this process until all the

03:56

necessary dimensions to adequately define the part are specified.

04:01

We can then use the extrusion tool to trace the actual geometry of the new part.

04:08

Once completed,

04:09

each part of the traced geometry needs to

04:11

be locked to the reference plane framework.

04:14

The easiest way to do this is by using the align tool

04:18

aligning each segment of the geometry to the corresponding reference plane,

04:22

making sure that in each case, the geometry is locked to the reference plane

04:33

at this point,

04:34

we can now stress test the part by adjusting some of the dimension values.

04:39

If the part has been modeled correctly,

04:41

then the part should behave as expected and change parametric

04:45

when the values are altered.

04:49

So when the extrusion is created, it is formed with a default thickness.

04:53

So we will need to change view and add some

04:56

reference planes there to define the thickness of the pier.

04:59

Always taking care to add some dimensions to

05:02

ensure that the central reference plane remains central.

05:06

But the process is essentially the same as we've carried out on the profile view.

05:12

Once that has been done

05:13

including the addition of a thickness parameter.

05:16

The pier is essentially complete and only needs saving in

05:19

order for it to be used in infra works.

05:21

So the process for adding either of the parts we've just created is identical.

05:26

For both inventor or reddit.

05:28

We add the part in the star palette as we do for all additional content,

05:33

we can configure the part for the parameters.

05:35

We want to allow the end user to see and change the labels if necessary.

05:40

Once the part is added to the star palette, it is then available for use.

05:44

All we need to do is select the pair we want to change in the model

05:48

and select our new peer from the resulting list,

05:51

the new pair will then be modeled in

05:53

place with the required parameters driving that geometry.

05:56

And then the end user making the necessary changes to the user parameters

06:01

to arrive at the required end geometry.

06:04

That pair can then be copied to other positions within the model.

06:07

And they will adapt parametric to the environment. They find themselves in

06:11

the bridge model can then be published ready for the

06:14

documentation phase that we have covered in our earlier video.

06:17

But it is important to point out that

06:19

rit generated parts,

06:21

maintain their family status and can be

06:23

adjusted within the rev it property palette.

06:31

So we are now going to turn our attention to some simple rebar modeling.

06:36

So the recommendation for this is to make sure

06:38

that our original rivet template was a structural one.

06:42

This will ensure that all the rebar,

06:43

visibility settings and rebar shapes are correct from the start.

06:48

Once the concrete cover settings have been adjusted,

06:50

we can then straight away select the rebar shape that

06:53

we require and place that bar in the section view,

06:56

the bar will snap to the concrete cover and size

06:59

itself accordingly and will position itself at the section location.

07:04

We can then use the edit constraints functionality to make

07:07

adjustments to the position and length of the bars.

07:10

Constraints can be relative to the concrete or another bar.

07:15

Clicking on a constraint allows the value to be adjusted to suit.

07:19

We can then use the rebar set drop downs to make

07:22

adjustments to the number of bars and how they are set out

07:26

as well as shape driven bar placement. There is also free form placement

07:30

that works in the 3D view.

07:32

This allows alignment for bar sets to be distributed within complex concrete

07:36

shapes or for bar shapes themselves to follow those complex shapes.

07:42

To use one of the free form methods.

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We will need to select the concrete part in a 3d view

07:49

and then specify which free form method to use, either aligned or surface.

07:55

We will then need to specify the rebar set values

07:58

and then proceed to select the host face for the bars followed

08:02

by faces to specify the start and end of the bar set.

08:08

Once the bars have been placed,

08:10

they can then also be adjusted using the constraints mentioned earlier.

08:15

Using this combination of bar placement methods,

08:18

we can place the other required bar sets within

08:21

this power cap in both the longitudinal and transverse directions

08:25

managing the bar layering with constraints.

09:01

If the structural template has been used,

09:04

a rebar schedule will have been scheduling each bar as it is placed.

09:09

This schedule can be examined and modified using the schedule

09:12

properties to customize the schedule to the required specification.

09:17

Once the schedule has been formatted,

09:19

it can then be added to any sheet to form part of the documentation output.