Buildings collapse and people die in earthquakes around the world each year including big cities like Christchurch NZ, so if ancient "jigsaw walls" are supposedly quake-proof, why haven't architects incorporated them into building designs?
PS- what does PP stand for? Are they what I call jigsaw walls?
(There are over 5 thousand posts in this thread and I can't go through every one to look up what PP means)
Cost. Try building a high rise out of jigsaw stone. Concrete is going to save bucket-loads. Some of the aspects of these designs are being incorporated into modern buildings. The Birds Nest built in China for the Olympics had a separate roof from the stadium, and millions of zig zag pylons around the perimeter to absorb shock from an earthquake. Tokyo is famous for earthquake proof structures, mostly using designs that date back over a thousand years.
The Tokyo "Sky Tree" is an intricate design, not using stone, but pipes. Modern materials.
And in his rise buildings
And incorporating what might seem like very ancient methods on very modern structures, such as a pendulum
The tuned mass dampener is an object (the gold ball) built in to a building's interior to absorb seismic shock.