engineering

Network for Earthquake Engineering Simulation

Network for Earthquake Engineering Simulation is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Network for Earthquake Engineering Simulation rather than just read about it. In short: The George E. Brown, Jr.

Key takeaways

Network for Earthquake Engineering Simulation belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Network for Earthquake Engineering Simulation to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Network for Earthquake Engineering Simulation from memory before moving on to harder problems.

Reference excerpt

The George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) was created by the National Science Foundation (NSF) to improve infrastructure design and construction practices to prevent or minimize damage during an earthquake or tsunami. Its headquarters were at Purdue University in West Lafayette, Indiana as part of cooperative agreement #CMMI-0927178, and it ran from 2009 till 2014. The mission of NEES is to accelerate improvements in seismic design and performance by serving as a collaboratory for discovery and innovation.

Description The NEES network features 14 geographically distributed, shared-use laboratories that support several types of experimental work: geotechnical centrifuge research, shake table tests, large-scale structural testing, tsunami wave basin experiments, and field site research. Participating universities include: Cornell University; Lehigh University;Oregon State University; Rensselaer Polytechnic Institute; University at Buffalo, SUNY; University of California, Berkeley; University of California, Davis; University of California, Los Angeles; University of California, San Diego; University of California, Santa Barbara; University of Illinois at Urbana-Champaign; University of Minnesota; University of Nevada, Reno; and the University of Texas, Austin.

The equipment sites (labs) and a central data repository are connected to the global earthquake engineering community via the NEEShub, which is powered by the HUBzero software developed at Purdue University specifically to help the scientific community share resources and collaborate. The cyberinfrastructure, connected via Internet2, provides interactive simulation tools, a simulation tool development area, a curated central data repository, user-developed databases, animated presentations, user support, telepresence, mechanism for uploading and sharing resources and statistics about users, and usage patterns. This allows researchers to: securely store, organize and share data within a standardized framework in a central location, remotely observe and participate in experiments through the use of synchronized real-time data and video, collaborate with colleagues to facilitate the planning, performance, analysis, and publication of research experiments and conduct computational and hybrid simulations that may combine the results of multiple distributed experiments and link physical experiments with computer simulations to enable the investigation of overall system performance. The cyberinfrastructure supports analytical simulations using the OpenSees software. These resources jointly provide the means for collaboration and discovery to improve the seismic design and performance of civil and mechanical infrastructure systems.

Cyberinfrastructure Cyberinfrastructure is an infrastructure based on computer networks and application-specific software, tools, and data repositories that support research in a particular discipline. The term "cyberinfrastructure" was coined by the National Science Foundation.

Projects NEES Research covers a wide range of topics including performance of existing and new construction, energy dissipation and base isolation systems, innovative materials, lifeline systems such as pipelines, piping, and bridges, and nonstructural systems such a ceilings and cladding. Researchers are also investigation soil remediation technologies for liquefiable soils, and collecting information about tsunami impacts and building performance after recent earthquakes. The permanently instrumented field sites operated by NEES@UCSB support field observations of ground motions, ground deformations, pore pressure response, and soil-foundation-structure interaction. The NEESwood project investigated the design of low and mid-rise wood-frame construction in seismic regions. The NEES@UCLA mobile field laboratory, consisting of large mobile shakers, field-deployable monitoring instrumentation systems, was utilized to collect forced and ambient vibration data from a four-story reinforced concrete (RC) building damaged in the 1994 Northridge earthquake. Shake table tests on pipe systems anchored in a full-scale, seven-story building performed on the Large High-Performance Outdoor Shake Table at NEES@UCSD investigated seismic design methods for anchors fastening nonstructural components.

Education, outreach, and training The NEES collaboratory includes educational programs to meet learning goals and technology transfer for various stakeholders. Programs include a geographically distributed Research Experience for Undergraduates (REU) program, museum exhibits, an ambassador program, curriculum modules, and a Research to Practice webinar series aimed at informing practicing engineers of the outcomes of NEES research. Companion cyberinfrastructure provides a framework for helping educators to enrich their curriculum with these resources. NEESacademy, a portal within NEEShub, is designed to support effective organization, assessment, implementation, and dissemination of learning experiences related to earthquake science and engineering. One source of content is the education and outreach products developed by NEES researchers, but anyone can contribute resources.

Soil liquefaction research The George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) hosts two geotechnical centrifuges for studying soil behavior. The NEES centrifuge at University of California Davis has radius of 9.1 m (to bucket floor), maximum payload mass of 4500 kg, and available bucket area of 4.0 m2. The centrifuge is capable of producing 75g's of centrifugal acceleration at its effective radius of 8.5 m. The centrifuge capacity in terms of the maximum acceleration multiplied by the maximum payload is 53 g x 4500 kg = 240 g-tonnes. The NEES centrifuge at the Center for Earthquake Engineering Simulation (CEES) at Rensselaer Polytechnic Institute has a nominal radius, 2.7 m, which is the distance between the center of payload and the centrifuge axis. The space available for the payload is a depth of 1,000 mm, width of 1,000 mm, height of 800 mm, and a maximum height of 1,200 mm. The performance envelope is 160 g, 1.5 tons, and 150 g-tons (product of payload weight times g).

References

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Worked examples

Example 1 — a first encounter with Network for Earthquake Engineering Simulation

Start with the simplest possible case. Write down what Network for Earthquake Engineering Simulation claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Network for Earthquake Engineering Simulation before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Network for Earthquake Engineering Simulation ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Network for Earthquake Engineering Simulation

In research: Network for Earthquake Engineering Simulation appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Network for Earthquake Engineering Simulation in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Network for Earthquake Engineering Simulation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Cyberinfrastructure, E-Science, Earthquake engineering, so understanding it makes those chapters shorter.
In everyday life: Look for Network for Earthquake Engineering Simulation outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Network for Earthquake Engineering Simulation in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Network for Earthquake Engineering Simulation means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Network for Earthquake Engineering Simulation out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Network for Earthquake Engineering Simulation in simple terms?

The George E. Brown, Jr.

Why does Network for Earthquake Engineering Simulation matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Network for Earthquake Engineering Simulation?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Network for Earthquake Engineering Simulation.