Hybrid Simulation of the Seismic Response of a Steel Moment Frame Building Structure through Collapse
29 Jul 2014 | Publications | Contributor(s): Maikol Del Carpio
Over the last decade several research projects have focused on the development of analytical tools for collapse assessment of structuralsystems subjected to seismic excitations (Elwood and Moehle, 2003,Sivaselvan and Reinhorn, 2006, Haselton and Deierlein, 2006, Huang and Foutch, 2009, Lignos...
Shear Wave Velocity Measurements at Municipal Solid Waste Landfills in Michigan
29 Jul 2014 | Publications | Contributor(s): Andhika Sahadewa, Dimitrios Zekkos, Adam Lobbestael, Richard D. Woods
A surface wave based methodology that uses a linear array of 16 geophones and combines active measurements (Multichannel Analysis of Surface Wave technique) and passive measurements (Microtremor Analysis Method) is presented. The methodology is implemented at 13 locations in 4 landfills to...
In Situ Assessment of the Nonlinear Shear Modulus of Municipal Solid Waste
29 Jul 2014 | Publications | Contributor(s): Dimitrios Zekkos, Andhika Sahadewa, Richard D. Woods, Kenneth Stokoe, Neven Matasovic
Assessment of dynamic properties of Municipal Solid Waste (MSW) is required for seismic response analyses of existing MSW landfills of moderate to high seismicity. While material properties such as shear wave velocity and unit weightcan be readily measured, of nonlinear dynamic properties of MSW...
STRAIN LOCALIZATION IN UNSATURATED POROUS MEDIA
29 Jul 2014 | Publications | Contributor(s): Xiaoyu Song
Motivated by new imaging techniques for quantifying density and the degree of saturation in geomaterials at a scale smaller than the specimen, the research presented inthis dissertation formulated and implemented two mathematical frameworks for coupled solid deformation/fluid diffusion in...
Effect of moment-to-shear ratio on the deformation of rocking shallow foundations - Phase 2 Data Report
29 Jul 2014 | Publications | Contributor(s): Manny Hakhamaneshi, Bruce Lloyd Kutter
Previous research efforts have contributed significantly to the development of the idea ofnonlinear analysis in performance - based evaluation. One of the limitations of the work done byBartlett (1976) and Wiessing (1979), however, is that the experiments were conducted at smallerconfining...
Balancing the Beneficial Contributions of Foundation Rocking and Structural Yielding in Moment-Frame and Frame-Wall Building Systems - Weian Liu, PhD Dissertation
29 Jul 2014 | Publications | Contributor(s): Weian Liu
This dissertation written by Weian Liu focuses on improvement of seismic performance of foundation-building systems by investigating (1) their performance with varying foundation moment capacity and (2) the relationship between energy dissipation and re-centering of these systems.
PhD Dissertation - Rocking Foundations for Building Systems - Effect of Footing Shape, Soil Environment, Embedment and Normalized Moment-to-Shear Ratio, by Manouchehr Hakhamaneshi
29 Jul 2014 | Publications | Contributor(s): Manny Hakhamaneshi
The dissertation written by Manouchehr Hakhamaneshi investigates the use of rocking shallow foundations in building systems, with emphasis on effects of footing shape, soil environment and different normalized moment-to-shear ratios.
Executive summary for Design of soil and structure compatible yielding to improve system performance (NEES-2009-0732)
29 Jul 2014 | Publications | Contributor(s): Bruce Lloyd Kutter, Tara Hutchinson, Sashi Kunnath, Lijun Deng, Mark Aschheim, Weian Liu, Manny Hakhamaneshi, Andreas Gerasimos Gavras, Mark Stringer, Molly Summers, Jacquelyn Allmond
This document written for NSF summarize general activities, main findings and conclusions of this project.
Response of a 2-Story Test-Bed Structure for the Seismic Evaluation of Nonstructural Systems
29 Jul 2014 | Publications | Contributor(s): Siavash Soroushian, Manos Maragakis, Arash E. Zaghi, Esmaeel Rahmanishamsi, Ahmad Itani, Gokhan Pekcan
Comprehensive Analytical Seismic Fragility of Fire Sprinkler Piping Systems
29 Jul 2014 | Publications | Contributor(s): Siavash Soroushian, Manos Maragakis, Arash E. Zaghi, Alicia Echevarria, Yuan Tian, Andre Filiatrault
3D Unit Cell Model of Prefabricated Drain in Liquefiable Soil
29 Jul 2014 | Computational Models | Contributor(s): Rachelle Howell, Xiaoyue Wang, Ellen M. Rathje
This OpenSees model is a 3D unit cell infinite slope model of the area of influence around a single drain (or, in the case of the untreated model, a free-field untreated area equal to the area of influence around a single drain). It was developed to simulate lateral spreading in the in-plane...
Benchmark Wireless Structural Control Problem
29 Jul 2014 | Computational Models | Contributor(s): Zhuoxiong Sun, Bo Li, Shirley Dyke, Chenyang Lu, Lauren Linderman
Structural control systems offer an attractive approach to protect civil infrastructures from natural hazards such as earthquakes. Wireless structural control systems which utilize wireless sensors for sensing, communication and control have drawn increased attention due to the flexible...
Performance Based Implementation of Seismic Protective Devices for Structures
29 Jul 2014 | Publications | Contributor(s): Wang Xi
In order to improve the seismic performance of structures and to reduce the total cost (both direct and indirect) due to earthquake damages, structural control through seismic protective devices in either passive or semi-active forms is essential to achieve the desired performance goals. This...
Verification of Real-Time Hybrid Simulation with Shake Table Tests: Phase 1 – Modeling of Superstructure
29 Jul 2014 | Publications | Contributor(s): Ali Irmak Ozdagli, Wang Xi, Yong Ding, Jian Zhang, Shirley Dyke, Bin Wu
In the last few decades, base isolation has become a recognized strategy for mitigating earthquake damage in civil engineering structures. To increase reliability and adaptability of these passive devices, semi-actively controllable magnetorheological (MR) fluid dampers can be introduced as a...
Verification of Real-Time Hybrid Simulation with Shake Table Tests: Phase 2 – Development of Control Algorithms
29 Jul 2014 | Publications | Contributor(s): Ali Irmak Ozdagli, Shirley Dyke, Wang Xi, Jian Zhang, Yong Ding, Bin Wu
In the last few decades, structural control has become a recognized strategy for mitigating earthquake damage in civil engineering structures. Within structural control, magnetorheological (MR) fluid damper is acknowledged as a promising method. In order to broadly evaluate the performance of MR...
Pipe Liners Undergo Initial Seismic Test
22 Jul 2014 | Notes | Contributor(s): Marti LaChance
ASCE Civil Engineering | July 22, 2014 | Online news
New structural system could help concrete bridges withstand earthquakes
16 Jul 2014 | Notes | Contributor(s): Marti LaChance
ASCE Smartbrief | July 16, 2014 | Weekly newsletter for ASCE members
New Concrete Bridge Bent System may Minimize Seismic Damage
15 Jul 2014 | Notes | Contributor(s): Marti LaChance
ENR.com Engineering News-Record | July 7, 2014 | Magazine, online magazine
Team Tests ABC System With Earthquake Resistance
15 Jul 2014 | Notes | Contributor(s): Marti LaChance
ASCE Civil Engineering Magazine | July 15, 2014 | Online magazine article about NEES bridge bent research at University of Nevada, Reno.
BNCS Educational Videos
15 Jul 2014 | Learning Objects | Contributor(s): Serge S Chakmakjian, Lelli Van Den Einde, Tara Hutchinson
A landmark full-scale test of a five-story reinforced concrete building was conducted on the NEES@UCSD shake table. The building was completely furnished with nonstructural components and systems. The knowledge gained from extensive data and video collected during construction, fabrication and...