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  1. PERFORMANCE EVALUATION OF WATER PIPELINES RETROFITTED WITH CURED IN PLACE PIPE LINER TECHNOLOGY UNDER TRANSIENT EARTHQUAKE MOTIONS

    29 Jul 2014 | Publications | Contributor(s): Z. Zong, Dimitra Bouziou, Brad Parker Wham, Andre Filiatrault, Amjad J Aref, Harry Stewart

    In past earthquake events, the seismic vulnerability of underground pipelines caused significant life and economic losses. Seismic retrofit of critical underground pipelines has become an urgent need of our society to improve the performance and serviceability of these critical lifeline systems...

  2. Post-Earthquake Evaluation of Pipelines Rehabilitated with Cured in Place Lining Technology using Acoustic Emission

    29 Jul 2014 | Publications | Contributor(s): Alireza Farhidzadeh, Ehsan Dehghan-Niri, Zilan Zong, Salvatore Salamone, Amjad J Aref, Andre Filiatrault

    To increase the operational lifetime of existing underground pipelines without laborious and costly excavation, replacement, and embankment, in-situ pipeline lining technology has received significant interest over the past three decades. This paper presents the results of an experimental study...

  3. Seismic Testing of Critical Lifelines Rehabilitated with Cured in Place Pipeline Lining Technology

    29 Jul 2014 | Publications | Contributor(s): Zilan Zong, Dimitra Bouziou, Brad Parker Wham, Andre Filiatrault, Amjad J Aref, Harry Stewart

    Trenchless technology is well accepted for repairing critical underground lifelines with minimal ground surface disruption. The cured in place pipeline (CIPP) lining process is an application of trenchless technology that involves the installation of fiber reinforced composites inside existing...

  4. NEESR Final Report: Ultra-low Forced Vibration Testing

    29 Jul 2014 | Publications | Contributor(s): Graham Charles Archer, Cole C McDaniel

    NEESR Final Report.A new concept in Forced Vibration Testing (FVT) for low-rise building structures using ultra-low force amplitudes was developed and implemented.

  5. Hybrid Simulation Evaluation of Innovative Steel Braced Framing System

    29 Jul 2014 | Publications | Contributor(s): T.Y. Yang, Bozidar Stojadinovic, Jack Moehle

    onventional concentrically braced steel frames are not capable of redistributing large unbalanced vertical forces caused by brace buckling through the system. This creates many design challenges to engineers. In order to retain the advantages of providing efficient stiffness and strength to...

  6. Results of Early Collaborative Research on Behavior of Braced Steel Frames With Innovative Bracing Schemes (Zipper Frames)

    29 Jul 2014 | Publications | Contributor(s): Roberto Leon, Chuang-Sheng Yang, Reginald DesRoches, Andrei M Reinhorn, Macarena Schachter, Bozidar Stojadinovic, T.Y. Yang, Benson Shing, Zhong Wei

    The new Network for Earthquake Engineering Simulation (NEES), which was inaugurated in late 2004 in the USA, intends to transform the way earthquake engineering research is conducted. In this paper, the initial collaborative experiences with an early NEES project will be described and some early...

  7. Hybrid On-Line Experiments and Monitoring of Structural Systems

    29 Jul 2014 | Publications | Contributor(s): Khalid Mosalam

    Final Report of Project CMS 0116005 Hybrid On-Line Experiments and Monitoring of Structural Systems

  8. Post - Eocene Deformation Observed in Seismic - Reflection Profiles Across the Southwestern Blytheville Ar ch and Crowley’s Ridge, Arkansas

    29 Jul 2014 | Publications | Contributor(s): Robert Williams, William J. Stephenson, Thomas L. Pratt, J.K. Odum

    Seismic reflection data description, analysis, and preliminary interpretation.

  9. Centrifuge Modeling of Bridge System with Rocking Footings

    29 Jul 2014 | Publications | Contributor(s): Lijun Deng, Bruce Lloyd Kutter, Sashi Kunnath, Thomas Algie

    This paper presents centrifuge tests to verify the valisity of a new design method that allows the rocking of spread footings during an earthquake to protect the columns from excessive demand.

  10. Seismic Protection of Highway Bridges with Negative Stiffness Devices

    29 Jul 2014 | Publications | Contributor(s): Navid Attary, Michael Symans, Satish Nagarajaiah, Andrei M Reinhorn, Michael Constantinou, Apostolos Aristotelis Sarlis, Dharma Theja Reddy Pasala, Douglas Taylor

    A new control device has been developed and implemented for seismic response control ofhighway bridges. The device produces negative stiffness in a completely passive manner via amechanical mechanism. Numerical simulations and experimental shaking table tests havedemonstrated the effectiveness...

  11. COMPARATIVE SEISMIC RESPONSE OF CODE DESIGNED CONVENTIONAL AND BASE-ISOLATED BUILDINGS TO SCENARIO EVENTS

    29 Jul 2014 | Publications | Contributor(s): K.L. Ryan, E. Erduran, P.J. Sayani, N.D. Dhao

    In this study, the seismic response of code-designed conventional and base-isolated steel moment frame and braced frame buildings is evaluated. Three dimensional models for both buildings are created and seismic response is assessed for three scenario earthquakes. The response history analysis...

  12. SEISMIC ISOLATION TECHNOLOGY IN THE UNITED STATES: EXAMINING THE POTENTIAL IMPACT OF EARTHQUAKE INSURANCE DISCOUNTS ON THE RATE OF SEISMIC ISOLATION ADOPTION

    29 Jul 2014 | Publications | Contributor(s): Lucy Arendt

    Unpublished paper. Seismic isolation and insurance.

  13. Comprehensive Analysis of the UTexas1 Surface Wave Dataset Analyst I

    29 Jul 2014 | Publications | Contributor(s): Clinton Miller Wood, Trent Ellis, David P Teague, Brady Cox

    This paper details the methodologies, uncertainties, and results from analysis of the UTexas1 Dataset. The vertical and horizontal seismic records from multiple field acquisitions of active-source and ambient-wavefield surface wave data were processed to obtain dispersion estimates using the...

  14. Synthesis of the UTexas1 Surface Wave Dataset Blind-Analysis Study

    29 Jul 2014 | Publications | Contributor(s): Brady Cox, Clinton Miller Wood, David P Teague

    This paper documents inter-analyst uncertainty/variability in dispersion and shear wave velocity (Vs) estimates from a blind-analysis study performed on a common experimental dataset of surface wave measurements. The dataset consists of both active-source and ambient-wavefield data collected...

  15. Los Angeles Inventory of Nonductile Concrete Buildings for Analysis of Seismic Collapse Risk Hazards

    29 Jul 2014 | Publications | Contributor(s): Thalia Anagnos, Mary Comerio, Christine Goulet, H. Na, J. Steele, Jonathan Paul Stewart

    Nonductile concrete buildings arguably represent the greatest seismic life safety hazard in many urban centersworld-wide because of their collapse potential. This paper documents the development of an inventory toevaluate the risk from the approximately 1600 potentially nonductile concrete...

  16. Los Angeles Inventory: Implications for Retrofit Policies for Nonductile Concrete Buildings

    29 Jul 2014 | Publications | Contributor(s): Thalia Anagnos, Mary Comerio

    Nonductile concrete buildings arguably represent the one of the greatest seismic life safety hazards in many urban centers world-wide because of their collapse potential. This paper discusses the preliminary results of an inventory to evaluate the risk from the approximately 1500 potentially...

  17. EXPERIMENTAL EVALUATION OF A 1/3rd SCALE LIGHTLY REINFORCED CONCRETE SLAB UNDER UNIFORM AND CONCENTRATED PUSH DOWN LOAD: EDGE CONDITIONS (Version A)

    29 Jul 2014 | Publications | Contributor(s): Cristian Enmanuel Acevedo, Ariel Creagh, Jack Moehle, Wael M. Hassan, Ahmet Can Tanyeri

    Tests were conducted on 1/3rd scale older reinforced concrete beam-slab system under support failure scenario. Specimen was an imitation of older RC structure and was detailed according to ACI-318 (1956). Before the push tests were conducted, uniform gravity load of 90 psf was applied on the...

  18. test_uploading99

    29 Jul 2014 | Publications | Contributor(s): Lily Dong

    test test test

  19. Time-domain hybrid formulations for wave simulations in three-dimensional PML-truncated heterogeneous media

    29 Jul 2014 | Publications | Contributor(s): arash fathi, Loukas Kallivokas, Babak Poursartip

    This paper describes our parallel forward wave simulator for 3D problems.

  20. Development of Soil Pressures under Lateral Loading

    29 Jul 2014 | Publications | Contributor(s): Anne Lemnitzer, Albert Luan Luu

    Paper presented at 10 CUEE CONFERENCE and was part of the PROCEEDINGS 10th International Conference on Urban Earthquake Engineering March 1-2, 2013,Tokyo Institute of Technology, Tokyo, JapanUnderground structures are typical infrastructural components in mega cities around the world and...