A Comparative Study of Sub-System and System Level Experiments of Suspension Ceiling Systems

15 May 2014 | Contributor(s): Siavash Soroushian, Esmaeel Rahmanishamsi, KiPung Ryu, Manos Maragakis, Andrei Reinhorn

A Comparative Study of Sub-System and System Level Experiments of Suspension Ceiling SystemsThe seismic performance of nonstructural systems can significantly affect the functionality of a building after an earthquake. Damage to these systems can result not only in loss of function but also in...

A COMPARISON OF THE SEISMIC DESIGN OF TALL RC FRAME-CORE TUBE STRUCTURES IN CHINA AND THE UNITED STATES

15 May 2014 | Contributor(s): Xiao Lu, Xinzheng Lu, Mengke Li, Linlin Xie

Comparison on the Seismic Performance of RC Frame-Core Tube Tall Buildings Designed Following Chinese and U.S. CodesStructural collapse resistance is an important part in the performance-based seismic design. Only when the collapse process is understood clearly, the structural collapse can be...

A Data Curation and Dissemination System for Earthquake Engineering

15 May 2014 | Contributor(s): Thomas Hacker, Standa Pejsa, JoAnn Browning

A Data Curation and Dissemination System for Earthquake EngineeringThomas HackerOver the past three years, the NEES project has developed a cyberinfrastructure that supports the collection, archiving, and dissemination of experimental and simulation data. During the development of this system, we...

A direct method for the design of viscous dampers to be inserted in existing buildings

15 May 2014 | Contributor(s): Luca Landi, Pier Paolo Diotallevi, Simone Lucchi

A direct method for the design of viscous dampers to be inserted in existing buildingsIn the design of viscous dampers to be inserted in existing structures the supplemental damping is often defined a priori, as the value is fixed before the execution of the seismic analysis. This way of...

A Fast High Order Accurate Method For Tsunami Propagation

15 May 2014 | Contributor(s): Anxin Guo, Shengchao Xiao, Hui Li

A time-space decoupled algorithm for tsunami propagationAnxin Guo, Shengchao Xiao, Hui LiThis paper presented an explicit and time-space decoupled numerical algorithm based on the exact solution of wave equation for tsunami propagation. The recursion formulas derived from this algorithm can reach...

A Framework and Case Study for Urban Seismic Risk Forecasting

15 May 2014 | Contributor(s): David Lallemant, Anne Kiremidjian, Steven Wong, Kristhian Morales

A dynamic risk assessment methodology for modeling time-varying risk in urban environmentsThe year 2008 marked a significant threshold in the history of human settlement, when for the first time ever urban dwellers outnumbered rural ones. This shift in population has also led to a shift in the...

A Framework for Measuring the Impact and Effectiveness of the NEES Cyberinfrastructure for Earthquake Engineering

30 Nov 2011 | Active Documents | Contributor(s): Thomas Hacker, Alejandra J Magana

A Full-Scale, Single-Column Bridge Bent Tested by Shake-Table Excitation

30 Jul 2012 | Publications | Contributor(s): Matthew Schoettler, Jose Restrepo, Gabriele Guerrini, David Elias Duck, francesco carrea

A landmark test of a reinforced concrete bridge column was conducted on the George E. Brown,Jr. Network for Earthquake Engineering Simulation’s shake table at U.C. San Diego. This wasthe first full-scale shake table test of a bridge column designed to current US seismic designprovisions and...

A Ground Model for Earthquake Response Analysis Derived as Best-Simplified with Using Microtremor Measurements

15 May 2014 | Publications | Contributor(s): Atsushi Mikami

A Ground Model for Earthquake Response Analysis Derived as Best-Simplified with Using Microtremor MeasurementsIn order to evaluate seismic performance of long-extended structures such as levees, underground pipes, and so on, it is necessary to evaluate ground responses over a wide area, taking...

A JAVA-BASED NUMERICAL WAVE TANK FOR EFFICIENT EXPERIMENTAL DESIGN

12 Jul 2011 | Poster | Contributor(s): Sean Brophy

 The java-based numerical modeling program is a software program intended to be used by researchers studying near shore wave dynamics and planning to perform physical modeling of their experiments.  This report expounds on the important features of the program and how it simplifies the...

A Low-Power Autonomous Digital Accelerograph – Replacement for the SMA

15 May 2014 | Publications | Contributor(s): Anthony Shakal, Carl Petersen, Troy Reitz

A Low-Power Autonomous Digital Accelerograph – Replacement for the SMADuring the last two decades strong motion accelerographs have become full-featured and high resolution. Typical instrument resolution is measured in micro-g’s. While very desirable in some applications, the resolution comes at...

A Major Research Accomplishment in Geotechnical Earthquake Engineering Simulation

17 Apr 2013 | Citations | Contributor(s): Mahdi Soudkhah

An innovative experimental framework for seismic soil-structure interaction investigation of foundations and structures subjected to a coupled horizontal and vertical ground motion disturbance was developed by Dr. Mahdi Soudkhah at the University of Colorado at Boulder. A series of...

A MECHANICS FRAMEWORK FOR THE ANALYSIS AND DESIGN OF PROTEIN BASED NANO MACHINES

04 Jan 2011 | Poster | Contributor(s): zahra shahbazi

Modeling protein molecules as kinematic chains providesthe foundation for developing powerful approaches to thedesign, manipulation and fabrication of peptide basedmolecules and devices. In this research we establish a procedureto analyze the mobility of protein molecules basedon predicting the...

A METHOD FOR THE RISK ASSESSMENT OF BUILDINGS DUE TO MULTIPLE HAZARD SOURCES AND CORRELATED FAILURE MODES

15 May 2014 | Publications | Contributor(s): Miguel Jaimes, Eduardo Reinoso, Luis Esteva

A METHOD TO RISK ASSESSMENT OF BUILDINGS DUE TO MULTIPLE HAZARDS AND FAILURE MODES RELATED AND INFLUENCE EACH OTHERAll structures are subjected to one or more natural hazards, such as earthquakes, hurricanes (cyclones), rain storms, volcanic eruptions, snow storms, tornados, wildfires or...

A Method to Estimate the Drift Response of Flat-Plate Structures Subjected to Strong Ground Motions

15 May 2014 | Publications | Contributor(s): Damon Fick

A Method to Estimate the Drift Response of Flat-Plate Structures Subjected to Strong Ground MotionsThe overall earthquake response of flat-plate structures depends on the hysteretic properties of the slab-column connection. The current understanding of the behavior is based largely on the tests...

A MICRO-UAV APPROACH TO EARTHQUAKE DISASTER SENSING: A CRITICAL REVIEW

15 May 2014 | Publications | Contributor(s): ZhiQiang Chen

A Micro-UAV Approach to Earthquake Disaster Scene Sensing and Proof-of-Concept StudiesStrong earthquakes when realized in urban areas often lead to disastrous consequences that overwhelm the local response capacity when responding to widespread human casualties and crippled built environment. The...

A Model for Fluctuating Torque on the Nucleus

12 Jan 2011 | Poster | Contributor(s): Tanmay P. Lele

In living cells, a fluctuating torque is exerted on the nuclear surface but the origin of the torque is unclear. In this study, we found that the nuclear rotation angle is directionally persistent on a time scale of tens of minutes, but rotationally diffusive on longer time scales. Rotation...

A Model for Predicting Panel Zone Deformation Capacity in Rehabilitated Steel Moment Connections

15 May 2014 | Publications | Contributor(s): Chia-Ming Uang, Dong-Won Kim, Colin Blaney

A Model for Predicting Panel Zone Deformation Capacity in Rehabilitated Steel Moment ConnectionsRehabilitation of pre-Northridge steel moment connections to avoid brittle fracture in the beam flange weld joints is a challenging task to design engineers. Designed by the building code (Uniform...

A modified Runge-Kutta Integration method for computational delay in Real time hybrid simulation

15 May 2014 | Publications | Contributor(s): Ge Ou, Shirley Dyke, Arun Prakash

Performance Evaluation of Real Time Hybrid Simulation Using Force Control and Displacement ControlAs an alternative approach to traditional shake table test, Hybrid Simulation (HS) is increasingly recognized as a powerful technique due to its flexibility to split the structure into numerical and...

A Multilevel Component Mode Synthesis Approach for Quantum Mechanical Electrostatic Analysis of Nanoscale Devices

04 Jan 2011 | Poster | Contributor(s): hua li

Two component mode synthesis (CMS) approaches, namely, the fixed interface CMS approach and the free interface CMS approach, are presented and compared for efficient solution of 2-D SchrÓ§dinger-Poisson equations in quantum-mechanical electrostatic analysis of nanoscale structures and...