From:
VisualThinker7@zzzzzzz
Date:
Fri, 4 Nov 2005 10:39:29 EST
Subject:
slip form masonry / earthquakes
The best way to build an earthquake resistant building is to incoporate
flexibility into the design and materials.
The strength of the joints must be carefully matched to the weigtht of the
materials used, as well, since vertical and latteral accelerations stress the
joints causing failure long before the materials themselves give way.
For example, in the Loma Prieta earthquake, the joints connecting the
sections of the Oakland Freeway failed, allowing intact sections of the upper level
to pancake down onto the lower level, crushing cars and people. In that
case, even steel rebar and girders were insufficient to maintain joint strength
against the weight of the concrete when accelerated by seismic movement.
These facts are difficult to take into account when building with stone. I
suppose one could drill holes in each of the stones and connect them with a
hidden framework of flexible steel bars.....
- Previous by Thread: message 00216: regime - AWeinfeld (03 Nov 2005)
- Next by Thread: message 00237: core drill bit - Zhivago97 (07 Nov 2005)
- Previous by Date: message 00227: slip form masonry - pwwhitley (04 Nov 2005)
- Next by Date: message 00229: regime - John Klassen (04 Nov 2005)
