Android phone, iPhone & iPad

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Components

At a glance: Components on an Android phone or iPhone or iPad are described here. The General – Components section describes aspects of the components edit facilities that are common to all the hardware platforms.

The main Components tab

Component names are listed on the Components tab; one of the main tabs described in the Android phone, iPhone & iPad – Introduction under Lists of Entities.

The Component edit facilities are Entity edit facilities as described in the Android phone, iPhone & iPad – Introduction. Here is an elaboration on that description.

Button – “Import component from another XSF file” on this Components tab is described in Android phone & iPhone – Files under Other files.

Button – “Write transformed section properties” on this Components tab writes a text file of the transformed section properties of the cross-section. This is a text file as described in Android phone & iPhone – Files under TXT files. For each component it gives:

• The total area
• The centroid of that area in terms of the X, Y axes.
• The second moments of area about the X and Y axes.

Finally it gives the same information for the whole cross-section using modula ratios stipulated for each component.

None of this information is used in the main computations described under Load cases.

To add a component

“+” button in the top right corner of the panel invokes facilities for adding a component to the list. A tap on this causes a change to a panel offering:

● Shape, typically of concrete.
● Point, typically an arrangement of steel bars.
● Cancel

A tap on a choice will cause the component list to reappear. If the choice was not “cancel” at the top of the list is a prompt “Enter a – component name” in grey text on a white background. A tap on that grey text will cause a virtual keyboard to appear at the bottom of the display so that a name can be entered.

The requirements of the name are described in Android phone, iPhone & iPad – Introduction, Entity names.

To edit a component

A tap on a component name in the list will open the component editor for that component. The panel will change to the first panel of that editor and on an iPad the cross section image in the background will change in that all the components except the subject component will be dimmed so that the subject component is highlighted.

The details of that editor panel depend on whether the component is a shape component or a point component.

Shape component edit facility

The shape component edit facility has two parts:

• for the overall description of the component. This occupies two panels on a phone but only one on an iPad,
• for the corners that define the shape. This is graphical information as described in Android phone, iPhone & iPad Introduction, Graphical Information.

When the edit facilities for a shape component are invoked an overall description panel will appear. On a phone this will be the first of the two panels. The back button on this panel will close the edit facility and the list of entities panel with the main tab buttons will reappear. On an iPad there is a ‘Close component editor’ button.

At the top of the first panel is a label “Modula ratio=” and a number with a blue glow indicating it is editable. This is used for the transformed section properties but not in the computations described under Load Cases.

Under that is a label “Material=” with a selection box. The alternatives offered are the names of the materials that have been described.

Under that is a label “Shape described” and a segmented control offering Anti-clockwise and Clockwise. The corners that define the shape are objects in terms of the Graphical Information description and have an order. That order must be consistent with this control.

Button – “Write to text file” writes a description of the component to a text file as described in Android phone, iPhone & iPad – Introduction, Files, TXT Files.

There is a heading Stage and Other distortions.

Under this heading is a label “In terms of reference axes” and under this is a selection box. The alternatives offered are the names of the load cases that have been described and also “Global”. Each load case has reference axes and “Global” means the X, Y axes. Under that the selected axes are described; the X and Y of the origin and the angle of the reference axis in terms of the X, Y axes.

Also under that ‘Stage and Other distortions’ heading are two parts headed by labels “Stage distortion” and “Other distortion” respectively.

Each part has three lines labeled

• “Axial strain=” .
• “Ref. ax. cur.=” that means “Reference axis curvature =”.
• “Other ax. cur.=” that means “Other axis curvature =”.

and each line has a number with a blue glow indicating it is editable.

If the user does not intend to use the stage distortion and other distortion facilities in the application all these number should be set to zero.

The application includes facilities that automatically give values to these number: the “Adopt this load case as at a stage” button on a load case edit panel sets the stage distortion, and the “Apply this set” button on the time affect set edit panel makes contributions to the Other distortion.

Where these facilities suffice there is no need to edit these number. The need to edit these numbers is discussed in General – Time affect sets.

On a phone the next button causes a change to a panel that presents an image of the cross section. This has the subject component highlighted the same as the background image on an iPad. It also has a next button.

On an iPad there is a an ‘Edit shape’ button.

Both these buttons invoke a graphic edit facility. On a phone the next button now leads to a graphics edit panel. On an iPad the overall description panel is hidden and a moveable panel that is a graphics edit panel appears.
Both these graphic edit panel are as described in Android phone, iPhone & iPad – Introduction, Graphical information, Graphic edit panel.

Point component edit facility

The point component edit facility has two parts:

• for the overall description of the component. This occupies one panels.
• for each individual point. This is graphical information as described in Android phone, iPhone & iPad Introduction, Graphical Information.

When the edit facilities for a point component are invoked the overall description panel will appear. On a phone the back button on this panel will close the edit facility and the list of entities panel with the main tab buttons will reappear. On an iPad there is a ‘Close component editor’ button.

At the top of the overall description panel is a label “Modula ratio=” and a number with a blue glow indicating it is editable. This is used for the transformed section properties but not in the computations described under Load Cases.

Under that is a label “Material=” with a selection box. The alternatives offered are the names of the materials that have been described.

Under that is a label “Section area =” with a number having a blue glow indicating it is editable. That number is the cross-sectional area associated with one point, usually the cross-section area of one steel reinforcing bar. This is used in the computations; both described under load cases and also the transformed section properties.

Further down is a label “Bar diameter =” with a number having a blue glow indicating it is editable. This is ignored by the computation described under load cases and also the transformed section properties. It is used with two buttons on the panel.

Button – “Compute from diam.” Computes a cross-sectional area from the given bar diameter and puts the result in the number adjacent to the “Section area =” label.

Button – “Compute from area” Computes a diameter from the given sectional area and puts the result in the number adjacent to the “Bar diameter =” label.

Button – “Write to text file” near the bottom of this panel writes a description of the component to a text file as described in Android phone, iPhone & iPad – Introduction, Files, TXT Files.

On a phone the next button causes a change to a panel that presents an image of the cross section. This has the subject component highlighted the same as the background image on an iPad.

On an iPad there is a an ‘Edit points’ button.

Both these buttons invoke a graphic edit facility. On a phone the next button now leads to a graphics edit panel. On an iPad the overall description panel is hidden and a moveable panel that is a graphics edit panel appears.

Both these graphic edit panel are as described in Android phone, iPhone & iPad – Introduction, Graphical information, Graphic edit panel. These graphic edit panels have data in addition to the co-ordinate paraments.

For the subject point the panel presents:

• the X value
• the Y value
• the other distortion strain value
• the stage distortion strain value

All these numbers have a blue glow indicating they are editable.

If the user does not intend to use the stage distortion and other distortion facilities in the application these “other distortion strain” and “stage distortion strain” values should be set to zero.

The application includes facilities that automatically give values to these numbers: the “Adopt this load case as at a stage” button on the load case edit panel sets this stage strain, and the “Apply this set” button on the time affect set edit panel makes contributions to this other strain.

Where these facilities suffice there is no need to edit these number. The need to edit these numbers is discussed in General – Time affect sets.