With marks 116 in JEE mains & 92.8% in CBSE +2, can I get admission in PEC Chandigarh in computer science or ECE?

For admission in PEC, you at least need to have 75% in your intermediate exams and cleared the JEE Main cut-off for the institute.

The following table shows the JEE Main Round 1 cut-offs for PEC in 2020: 

*Here, 'other state' is OS, and 'home state' is HS.

Seeing the cut-off rank, you might not get PEC Chandigarh at your mentioned profile.

• With 92.8% in 10+2, you have cleared one basic eligibility for the institute.
• Another eligibility is clearing JEE Mains cut-off for PEC. At the mentioned score of 116 in JEE Main, your rank will be approximately around 55000. This rank cannot get a seat in any of the 6 rounds.

If you are desperate to join this year, then you can search for CSE/ECE branch other institutes, as per your JEE rank. But, if you can have time in your hands, you can give another attempt in JEE Mains.