Challenges and Opportunities of Performance-Based Design of Structures under Earthquake Loads
Abstract
Performance-based design of structures differs from the conventional prescriptive approach mainly in two technical aspects. One is to relate the design to structural performance directly, and the other is to design a structure for multiple performance objectives. Due to load and strength uncertainties, however, it is impossible to design a structure for specific performance objectives with complete assurance. In this paper, a framework involving structural control and system identification emerging technology is proposed to reduce the load and strength uncertainties, and to introduce a new design concept for the optimized balance of the load and strength under multiple performance objectives. It involves four main components: new definition of design earthquakes to minimize the variability of ground motions, bounded control on the seismic responses of a structure for further reduction of the variation of seismic load, on-line system identification of hysteretic behavior for reduction of the strength uncertainty, and damping-enhanced strengthening methodology for the optimal performance of the structure. The needs and approaches to develop these concepts are discussed, and some of the preliminary results are presented towards their development with a simple structure.
Recommended Citation
G. Chen and B. Xu, "Challenges and Opportunities of Performance-Based Design of Structures under Earthquake Loads," Proceedings of the 3rd International Conference in Earthquake Engineering: New Frontier and Research Transformation (2004, Nanjing, China), Oct 2004.
Meeting Name
3rd International Conference in Earthquake Engineering: New Frontier and Research Transformation (2004: Oct. 18-20, Nanjing, China)
Department(s)
Civil, Architectural and Environmental Engineering
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Publication Date
01 Oct 2004