Bridge analysis software to model the interaction of soil, foundation and structure in simulated earthquakes weighs a host of variables to achieve results. Making such a complex process user-friendly is a challenge.
BridgePBEE, a graphical pre- and post-processor performance-based earthquake engineering (PBEE) analysis tool, aspires to do just that. The beta version is available for free download from the University of California, Berkeley's Pacific Earthquake Engineering Research (PEER) Center.
Because it can moderate the damaging effects of earthquakes, base-isolation is a technique used primarily in seismically active regions. ENR takes a look at some of the largest applications of base-isolation technologies in the world.