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Code-based earthquake engineering is on the verge of getting simpler, thanks to the National Earthquake Hazards Reduction Program’s recommendation to replace the traditional seismic hazards maps with an improved seismic hazards database.
Team building (W)rapper’s ribboned exoskeleton, which is not self-supporting until it is done, relies on falsework for stability during steel erection.
A magnitude 7.1 temblor struck northeast of Los Angeles on Friday, July 5 at 8:19 p.m., a day after a 6.4 magnitude rocked the same area, knocking out power to thousands and prompting questions on proper calibration of a recently introduced earthquake early-warning system.
The magnitudes 7.0 and 5.7 earthquakes that struck Anchorage, Alaska, on Nov. 30 shook buildings and shattered highways, but caused limited structural damage and no reported loss of life, mostly due to the depth and location of the quake’s epicenter, as well as the city and state’s stringent building requirements.
Gov. Jerry Brown (D) in late September vetoed a bill that would have directed California municipalities to create a database of structures that would be at risk of collapse as a result of seismic events.
The joint venture of American Bridge and Fluor Corp. has reached a settlement valued at $34 million with the California Transportation Dept. (Caltrans) to end a five-year dispute involving faulty seismic anchor rods used for the $6.5-billion San Francisco-Oakland Bay Bridge rebuild.