Bowen Lab Projects - Earthquake Engineering

Seismic Response of Reinforced Concrete Walls with Lap Splices
Lap-splice failures in reinforced concrete walls and smoke stacks after recent earthquakes (e.g. Izmit, Turkey in 1999, Northridge, United States in 1994, Maule, Chile in 2010) and the scarcity of experimental data revealed the need for this investigation.
US-China: Verification of Real-Time Hybrid Simulation Through Shake Table Comparison US-China: Verification of Real-Time Hybrid Simulation Through Shake Table Comparison
Real-time hybrid simulation (RTHS) provides researchers the opportunity to isolate and physically investigate only the more complex or critical components, while numerically including the remainder of the structure. This approach allows for a wide range of configurations to be tested using a single test specimen. This work present the results of a three phase project focusing on comparison of analytical simulation, physical full-scale tests and real-time hybrid simulation tests of a medium-scale prototype structure under various earthquake inputs.
Detecting and Quantifying Damage in Buildings using Earthquake Response Data Detecting and Quantifying Damage in Buildings using Earthquake Response Data
The focus of this research is to develop the means to detect and quantify damage in buildings following earthquakes. The hypothesis is that building acceleration records contain sufficient characteristic information to develop the lateral-load resistance curve, also known as the capacity curve, from which the extent and locations of nonlinear behavior could be estimated.
NEES Network Testbed NEES Data Flow Testbed
The George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) of the National Science Foundation has been developed to accelerate improvements in seismic design and performance by serving as an indispensible collaboratory for discovery and innovation ( NEES is headquartered at Purdue University's Discovery Park, and NEEScomm is the managing organization. NEEScomm is responsible for leading the network of equipment sites and for serving the needs of the US earthquake engineering community of researchers. The development of the cyberinfrastructure linking the network together through the NEEShub requires close collaboration between the information technology developers and the earthquake engineers. To support user requested developments, NEEScomm has developed a simplified testbed revolving around the typical "Data Flow" used by NEES researchers. The testbed facilitates building a partnership between IT and the earthquake engineers.
  CyberMech, a Novel Run-Time Substrate for Cyber-Mechanical Systems
The core objective of this collaborative research is to develop a novel run-time substrate, CyberMech, to enhance the performance of real-time cyber-mechanical experiments through an integrated set of advances in (1) cyber-physical co-design of how control and simulation computations are decomposed for real-time parallel executions; (2) configurable and adaptive platform concurrency and communication mechanisms to deal with physical and computational timing constraints; (3) design, conduct, and evaluation of representative real-time hybrid experiment that demonstrate the tight integration of timing, sequencing, and value semantics across cyber and physical domains. The CyberMech substrate will be directly applicable to the highly multidisciplinary field of earthquake engineering which includes researchers and professional engineers, social scientists, emergency responders, hazard management personnel, and public policy makers.
advanced structural damping systems Performance-Based Design and Real-time, Large-scale Testing to Enable Implementation of Advanced Damping Systems
Advanced structural damping systems such as magnetorheological dampers have great potential to play a large role in our ability to achieve performance-based structural design (PBD) directed towards seismic resilience. This research project focuses on the development of appropriate performance-based design procedures and model-based simulation techniques for advanced damping systems in civil engineering applications. Real-time hybrid (RTH) testing techniques are utilized to validate and evaluate the performance of such damping technologies. Completion of this project will result in the availability of design procedures and new testing methods for advanced damping system implementation in buildings.
shake table equipment University Consortium for Instructional Shake Tables (UCIST)
Experiments are quite effective for demonstrating basic concepts in structural dynamics and earthquake engineering to students. Shake tables are typically used for experimental research in earthquake engineering, but they are also very useful for instructional demonstrations. The University Consortium on Instructional Shake Tables (UCIST) has partnered with the George E. Brown Network for Earthquake Engineering Simulation (NEES), a premier cyber-environment project funded by NSF. The partnership focuses on developing a network of bench-scale earthquake engineering facilities that will engage a broad range of students by creating a series of shared laboratory exercises available for remote operation via the internet.
NEES Collaborative Research: Behavior of Spirally Reinforced Concrete Columns under Load Reversals NEES Collaborative Research: Behavior of Spirally Reinforced Concrete Columns under Load Reversals
This project is part of a collaborative study of Soil-Foundation-Structure-Interaction (SFSI). To study the prototype structure, a series of four physical models were tested in the overall project. These models were tested using one of the following test types: centrifuge testing,field tests, shaking table tests, and laboratory tests. Large-scale individual columns and bridge bents have been built and tested at Purdue to evaluate strength degradation in flexure and shear under cyclic loads.

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