Moving from the lab to the field, a highway off-ramp bridge under construction in Seattle features memory-retaining metal rods and bendable concrete designed to provide the structure with flexibility sufficient to withstand a major seismic event.
The $5-billion renewal of the Stanford University Medical Center in highly seismic Palo Alto is rich with the demands of all health care facility expansions.
Structural engineer Cary Kopczynski once penned a prediction: “There may come a day in the not-too-distant future when concrete building structures will commonly be reinforced with a combination of steel fibers and steel reinforcing bar.
To preserve Michelangelo’s final sculptural masterpiece, La Pietà Rondanini, the city of Milan turned to a diverse team to develop an isolated support structure for the statue that would limit the impacts of vibrations from both earthquakes and local traffic.
Since Los Angeles joined San Francisco Bay Area cities last October in tightening seismic standards for non-ductile concrete buildings and multi-family, wood-frame structures with parking underneath (ENR 11/9/15 p. 16),
seismic retrofit work in those cities has been booming.
While the saga of the tunnel-boring machine dubbed “Bertha” has dominated headlines, another controversial but crucial project is progressing right next to the Alaskan Way Viaduct replacement work.
Two recently updated ASTM International standards for seismic risk assessment of buildings, intended to increase the quality of SRA reports, could also cause an uptick in inspection costs.