Special Session: Recent Advances in Dense Array Seismology
Type: Poster
Day: 5/16/2018
Time: 10:45 AM
Room: Riverfront South
Abstract
In collaboration with the VA, the U.S. Geological Survey has developed structural health monitoring (SHM) software that utilizes vibration inputs to continually analyze and archive the response characteristics of a building in near real-time. The SHM software is built on the Earthworm (EW) system (Johnson et al., 1995), which is an open data processing platform that allows any continuous waveform data to be collected into ring buffers from a digitizer for further analyses (http://www.isti2.com/ew). The SHM software initially determines baselines for a suite of structural response parameters, and then continuously examines the response for changes in these parameters. The structural parameters monitored currently are inter-story drift ratios, shear-wave travel times throughout the building, and base-shear capacity-demand ratio. The SHM software is integrated with a web-enabled SHM data management framework to support aggregation, storage, and reporting of SHM data obtained and analyzed from instrumented hospital buildings to record strong shaking from earthquakes. By analyzing and characterizing the threshold values for building-specific engineering demand parameters, the SHM software can determine inspection priority to be low, moderate, high or very high and thus assist efforts in evaluating the safety and integrity of buildings in the aftermath of an earthquake. The SHM software is scalable—to support an arbitrary number of sensors, and it is extensible—to accommodate new data streams without the need to rewrite storage and display logic. The SHM software works on site or remotely. The software was validated using both ambient and low- and high-intensity shaking data inputs to a full-scale seven-story reinforced concrete building section tested on the UC San Diego shake table.
Author(s):
Kalkan E. U.S. Geological Survey
Fletcher J. U.S. Geological Survey
Friberg P. A. Instrumental Software Technologies
Baker L. M. U.S. Geological Survey
Archilla J. U.S. Department of Veterans Affairs
Advanced Structural Health Monitoring System for U.S. Department of Veterans Affairs Hospital Buildings
Category
Recent Advances in Dense Array Seismology