Do concrete structures ever suffer seriously by being struck by lightning?
Yes, lightning commonly causes structural damage. So-called cold bolts of lightning, following their way to the ground through concrete (which is a better conductor than air) often provide enough force to fragment the concrete. Another thing that can happen is that as the main bolt follows a lightning protection system to the ground an opposite charge is built up in the reinforcing steel in the nearby concrete, followed by a secondary flash between the conductor and the rebars. This sideflash produces an explosive effect in the concrete.