Research Focus: Structural Engineering

Faculty Engaged in Structural Research

Bocchini

Paolo Bocchini, Ph.D., University of Bologna, 2008, Assistant Professor. Research interests include computational mechanics, probabilistic structural analysis, structural reliability, resilience and sustainability of infrastructure systems, bridge network analysis, structural health monitoring by guided ultrasonic waves.

Fisher

John W. Fisher, Ph.D., Lehigh, 1964, Professor Emeritus. Research interests include structural connections; fatigue behavior of welded components; fracture analysis of steel structures; and behavior and performance of steel bridges.

Frangopol

Dan M. Frangopol, Sc.D., University of Liège, Belgium, 1976, Professor, Fazlur Rahman Khan Endowed Chair. Research interests include safety and reliability in structural engineering; optimal design and maintenance of civil infrastructure systems; bridge engineering and management based on life-cycle cost; damage assessment and safety evaluation of existing structures; and life-cycle performance-based reliability assessment of buildings, bridges, and marine structures.

Mueller

Peter Mueller, Dr. sc. techn., ETH, Zurich, 1978, Associate Professor. Research interests include behavior of reinforced and prestressed concrete structures and truss models for concrete connections.

Naito

Clay Naito, Ph.D., P.E., University of California – Berkeley, 2000, Associate Professor. Research interests include experimental and analytical evaluation of reinforced and prestressed concrete structures subjected to extreme events, including earthquakes and intentional blast demands.

Pakzad

Shamim N. Pakzad, Ph.D., University of California – Berkeley, 2008, P. C. Rossin Assistant Professor. Research interests include structural health monitoring; wireless sensor networks; damage detection; system identification and signal processing; probabilistic methods in civil engineering and structural reliability; random vibrations and structural dynamics; and structural monitoring of large infrastructures and bridges.

Pessiki

Stephen Pessiki; Ph.D., Cornell, 1990, Professor. Research interests include behavior and design of structures; nondestructive evaluation of materials and structures; fire effects on structures; earthquake engineering; innovative building systems; and thermal performance of building envelopes.

Quiel

Spencer Quiel, Ph.D., P.E., Princeton University, 2009, Assistant Professor. Research interests include structural resistance to extreme loads, particularly fire and blast; design of structures to resist progressive collapse; structural robustness and resilience; and the development of improved design standards via experimental testing and computational analysis.

Ricles

James M. Ricles, Ph.D., University of California – Berkeley, 1987, Bruce G. Johnston Endowed Professor. Research interests include seismic response and retrofit of steel or composite steel-concrete connections, components and systems; innovative advanced structural systems for seismic hazard mitigation; real-time hybrid testing for simulation of dynamic loading; structural applications of advanced materials; behavior of steel structures at elevated temperatures; and repair of damaged or deteriorated offshore structures.

Sause

Richard Sause, Ph.D., University of California – Berkeley, 1989, Joseph T. Stuart Professor. Research interests include application of high-performance materials; innovative structural systems; highway bridges and structures; earthquake-resistant and blast-resistant structures; and simulation of structural dynamic response.

Suleiman

Muhannad Suleiman, Ph.D., Iowa State University, 2002, Assistant Professor. Research interests include soil-structure interaction; foundation engineering; underground structures; ground improvement; advanced sensors and instrumentation; pervious concrete; and sustainable geotechnical and foundation systems.

ATLSS

John L. Wilson, Ph.D., Pittsburgh, 1972, Professor. Research interests include collaborative information systems; computer modeling of complex systems; life-cycle process models; and behavior of structural members and systems.

Integrated Framework for the Application of Probabilistic Optimization Technology (POTech) to Weapons:  Emphasis on Modeling and Simulation

Principal Investigator: Dan Frangopol
Co-Principal Investigator: Paolo Bocchini
Funded by the Pennsylvania Innovation Enterprise/Pennsylvania Innovation and Advanced Technology Association

The goal of the project is to assess and improve the reliability of weapon systems with various degrees of complexity. This is achieved by developing computational models, calibrated with experimental data, to perform probabilistic analyses and optimize the design and maintenance plan of the systems.

Development of Characterization of Failure Modes for Mechanical Components

Principal Investigator: Dan Frangopol
Funded by Progeny Systems Corp. for the Office of Naval Research

Dan Frangopol is helping Progeny Systems Corp. develop a database of submarine component failure modes. He is also participating in creating a methodology that certifies the shock-worthiness of new submarine components that have similar failure modes. Click here for more information.

Integrating SHM and Time-Variant System Performance of Naval Ship Structures for Near Real-Time Decision-Making under Uncertainty:  A Comprehensive Framework

Principal Investigator: Dan Frangopol
Funded by the U.S. Department of Defense–Navy–Arlington

The main goal of this research project is to provide a novel framework that can improve the system performance of naval ship structures. The framework consists of cost-effective management plans that integrate structural health monitoring concepts with time-variant system performance. For more information, click here.

Core Fund: Advancing Steel and Concrete Bridge Technology to Improve Infrastructure Performance, Task 8:  System Reliability in Special Steel and Concrete Bridge Systems

Principal Investigator: Dan Frangopol
Funded by the U.S. Department of Transportation – Federal Highway Administration

This research project aims to develop a set of redundancy factors for bridge design. Considerations include the general modeling of the bridge’s structural system; its number of components; the post-failure material behavior of the bridge components; and uncertainties in loads and resistances. The goal is to produce a set of practical, redundancy-factor modifiers that can be applied to a wide range of systems with differing components and configurations. Project outcomes will help practitioners achieve a deeper understanding of the redundancy-based performance indicator for bridge systems. Click here for more information.

PITA XVI:  Reliability, Maturity, and Readiness of Complex Systems

Principal Investigator: Dan Frangopol
Funded by the Pennsylvania  Infrastructure Technology Alliance

The application of reliability concepts to structural and non-structural complex systems is the focus of this research project. Also under investigation is how the application of reliability concepts can help define system readiness and maturity. Civil, marine, aerospace, and defense systems can all potentially benefit from the results of this investigation. For more information, click here.

Spencer Quiel YouTube Video

Research Overview:
Spencer Quiel, Structural Engineering

One of CEE's newest assistant professors discusses his work within Lehigh's strong civil engineering tradition.


Progressive Collapse Resistance of Precast Concrete Frames: Design Criteria and Connection Detailing

Principal Investigator: Spencer Quiel
Co-Principal Investigator: Clay Naito
Funded by the Precast/Prestressed Concrete Institute (PCI) as part of the Daniel P. Jenny Fellowship Program

Recent structural failures around the world have spurred the need to design structures to resist "progressive collapse," i.e. a chain reaction of structural collapse that is triggered by the initial failure of only a small portion of the system. Precast concrete structures are more cost-effective than other construction methods (such as steel or cast-in-place concrete framing) because the elements are constructed offsite and rapidly assembled. However, there is currently little published research that supports the use of precast concrete framing for resisting progressive collapse.

In a joint study with Clay Naito, Quiel is developing improved design details and implementation guidelines for precast concrete structures that resist progressive collapse.

PITA XVI: Tensile Properties of Modern Steel Cables at Elevated Temperatures

Principal Investigator: Spencer Quiel
Funded by the National Science Foundation–Directorate for Engineering

Fire represents one of the most likely and potentially severe threats to the integrity of our built infrastructure. Steel cables used in bridge structures are especially susceptible to fires, due to their use and location. Fires that threaten bridges typically result from vehicle crashes and subsequent combustion of fuel or transported hazardous materials. These fires typically have a faster heating rate and higher maximum and overall heat release than typical building fires.

Quiel is currently engaged in an experimental study that addresses the need for new data on the tensile properties of cold-drawn steel cables and wire at high temperature, particularly those used in bridge applications. This externally-funded project is a collaboration between the Center for Advanced Technology for Large Scale Structures (ATLSS) at Lehigh University and Wirerope Works, Inc. of Williamsport, Pa. Additional support is provided by the Pennsylvania Infrastructure Technology Alliance (PITA) Program.


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