Hybrid Simulation Platform for Seismic Performance Evaluation of Structures Through Collapse
The research objective of this project is to enhance the hybrid simulation methodology to evaluate the performance of large-scale structures loaded up to collapse. Hybrid simulation, which combines numerical simulation with experimental simulation of structural elements, provides a more realistic, reliable, and economical approach to testing structural systems under earthquake loads.
Fundamental contributions that address issues related to numerical, experimental and boundary condition errors and assumptions will be made in the development of algorithms used in testing and validation procedures. In particular, the computational platform will provide capabilities for robust implicit integration algorithms and fault-tolerant distributed control strategies to enable testing of complex structural systems utilizing geographically distributed testing of its substructures.
The resulting testing and simulation platform will be used to evaluate the seismic performance of large-scale steel moment frame structures from the onset of damage through collapse. Key subassemblies will be experimentally tested and the global system response will be captured through interaction with the numerical model. The efficacy of hybrid simulations to predict collapse will be validated through comparison with the results of full-scale testing in Japan.
Upon its completion, the improved hybrid simulation platform developed in this project can be used to generate complete fragilities of structural components and systems from the onset of damage through collapse as required for next-generation performance-based earthquake engineering.
Education and outreach activities are planned in partnership with the University at Buffalo Graduate School of Education and local schools districts.
This project was awarded through the NSF Faculty Early Career Development (CAREER) Program.
Ahmadizadeh, M. and Mosqueda, G.. "Online energy-based error indicator for assessment of numerical and experimental errors in hybrid simulation," Engineering Structures, v.31, 2009, p. 1987.
Mosqueda, G. and Ahmadizadeh, M. "Implicit Numerical Integration in Hybrid Simulation with Iteration Strategy for Experimental Substructures," American Control Conference 2009, 2009, p. 5241-5246. View record at Web of Science