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  1. 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...

  2. 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...

  3. 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...

  4. 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...

  5. 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...

  6. 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.

  7. 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.

  8. 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.

  9. 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

  10. 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

  11. 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...

  12. 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...

  13. 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...

  14. 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...

  15. 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...

  16. Pipe Liners Undergo Initial Seismic Test

    22 Jul 2014 | Notes | Contributor(s): Marti LaChance

    ASCE Civil Engineering | July 22, 2014 | Online news

  17. 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

  18. 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

  19. 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.

  20. 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...