thermografie bridge soffit

[anastsia]

I have a question about thermography on bridges. I have a bridge with circular internal cavities. Now, I am examining the underside of the bridge using thermography, and the areas of the cavities appear cooler. I understand that concrete above the cavities cools or heats up more quickly, and that the cavities slow down the heat flow from top to bottom. However, I am unsure how the contrasts of the cavities change throughout the day. What happens when the bridge heats up? How would the contrasts change from morning to afternoon to evening? what happens when sun is directlxý shining on the bridge?
Maybe someone can help me.

[m k]

I think people around here are a bit differently oriented.

Is it windy, maybe there are some turbulence.

[Simon]

what?

[m k]

Asking from me?

World is full of bridges and maybe it's just a small one.
If I misunderstood OP will correct me.

[Simon]

No, I ask what of the original poster. It's so garbled that it was reported as a post by an AI bot.

[m k]

Maybe OP is a seasoned bridge engineer, but new with thermal images and forced to use a translator, for personal reasons.