I want to make a form with html css js that support this feature

Problem:

Imagine i have an array like this: [0=> [armature => 10,format => 2, concrete => 31],1=> [armature => 31,format => 21, concrete => 13],2=> [armature => 11,format => 21, concrete => 21]]

in my html inputs i have to name they in this way =>

<input name="column[0][armature]">
<input name="column[0][format]">
<input name="column[0][concrete]">

So this is easy to make inputs for it.. but the problem is send it as an array with ajax... because the html dont care about the [ and treat them like a string...

So how can i get them as array... can you show me an example? Thanks in advance