Advanced seismic isolation and damping system - GIF

[Duke_of_URL]

I'd like to know how they drilled into the sectioned column-ends for all those anchor bolts, assuming they had to be relatively "deep" holes to accommodate the anchors. It must require a special machine to do it with any kind of precision.

[Frank S]

I'd like to know how they drilled into the sectioned column-ends for all those anchor bolts, assuming they had to be relatively "deep" holes to accommodate the anchors. It must require a special machine to do it with any kind of precision.

It was most likely cast in place as the column was poured

[Duke_of_URL]

It was most likely cast in place as the column was poured

I know there are many post-construction solutions available providing existing structures increased seismic resistance, and was speculating this being one of those.

[Frank S]

I know there are many post-construction solutions available providing existing structures increased seismic resistance, and was speculating this being one of those.

Yep. But I was looking at the pour marks left by the inconsistent placement of the forms and the fact that the concrete extends a little down the side of the tip plate.

I can't help but wonder if any of the seismic isolation devices will be very effective in real world massive earthquakes when the ground actually has upheaval of s few feet. Minor shaking of an 8.5 is nothing when compared to what will happen when tectonic plates slip over one another. Can any tall building survive even a 2° tilt of the surface.