You could try using an edit decision list (.edl) and import it.
An example would be:
Let’s say your clip’s file name is ClipA.mp4 and you want to create a timeline with ClipA cut into 0.5sec segments. ClipA starting timecode is 00:00:00:00 and shot at 24 fps so 0.5 secs is 12 frames.
Create an edl file (simple text file with extension .edl) something like this:
———————————————————-
TITLE: Cutting Up Clips
FCM: NON-DROP FRAME
001 AX V C 00:00:00:00 00:00:00:12 00:00:00:00 00:00:00.12
* FROM CLIP NAME: ClipA.mp4
002 AX V C 00:00:00:12 00:00:01:00 00:00:00.12 00:00:01:00
* FROM CLIP NAME: ClipA.mp4
003 AX V C 00:00:01:00 00:00:01:12 00:00:01:00 00:00:01.12
* FROM CLIP NAME: ClipA.mp4
004 AX V C 00:00:01.12 00:00:02.00 00:00:01.12 00:00:02.00
* FROM CLIP NAME: ClipA.mp4
005 AX V C 00:00:02.00 00:00:02.12 00:00:02.00 00:00:02.12
* FROM CLIP NAME: ClipA.mp4
006 AX V C 00:00:02.12 00:00:03:00 00:00:02.12 00:00:03:00
* FROM CLIP NAME: ClipA.mp4
————————————————————-
Then in DaVinci, go File -> Import -> Pre-conformed EDL
Select the EDL you just created, give the new timeline a title, select the correct bin the ClipA.mp4 clip is in and hey-presto, you have a timeline with your clip cut up into 0.5sec bits.
I have attached a sample file for you, I had to rename it to .txt so Creative Cow would allow the upload but just rename it to test.edl before you import it into Resolve.