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By June 28, 2012 Read More →

New bridge analysis tool models multiple earthquake variables

BridgePBEE is new software from engineering researchers at the University of California, Berkeley that can model the interaction of soil, foundation, and structure in an earthquake.

An image from a single-span bridge analysis performed by BridgePBEE. (Source: PBEE)

Computer-based analysis of earthquake structural damage is a complex task. A new free software tool from engineering researchers at the University of California, Berkeley lets civil engineers conduct studies on a two-span, single-column highway bridge in a graphical environment.

BridgePBEE brings graphical pre-and post-processing to performance-based earthquake engineering (PBEE). It is now available as free software in beta release (open testing), published by the Pacific Earthquake Engineering Center at UCB. In addition to the more complex two-span bridge analysis, the software can also provide analysis on simpler pushover or base-input acceleration.

BridgePBEE is built on the Open System for Earthquake Engineering Simulation (Open-Sees), an open-source framework designed to provide 3D finite element analysis for structural and soil models, work with high-performance computing environments, and leverage a variety of databases and scientific visualization methods.

Samples of BridgePBEE at work are available on the software’s home page.

The Cypress Structure, the freeway approach to the Bay Bridge from Oakland, collapsed during the Loma Prieta earthquake, killing 42 people. At least two properties of the Earth's crust conspired to cause this collapse: it was built on loose soils that shook much more strongly than surrounding regions on stronger ground, and variations in the thickness of the Earth's crust between the epicenter of the Loma Prieta earthquake in the Santa Cruz Mountains and Oakland actually focused energy toward Oakland and downtown San Francisco. (Source: CalTrans)

 

 

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Posted in: Civil, News Watch

About the Author:

Randall S. Newton is the former Managing Editor of GraphicSpeak. He has been writing about engineering and design technologies for more than 25 years.

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