PITA Fiscal Year 2013 Projects

Assessment Of Structural Systems Using Cost-Effective Elastomeric Dampers To Achieve Enhanced Seismic Performance

Lead University: Lehigh University
PI: James Ricles, Dept. of Civil and Environmental Engineering
PA Industry: Corry Rubber Corporation

The proposed study will experimentally validate the seismic performance of buildings structural systems with elastomeric dampers, where the dampers are integrated into the design of the structural system to enable high performance to be achieved in a cost-effective manner. The dampers are a newer version of a second-generation damper that was developed by Lehigh University, Penn State Eire and Corry Rubber, Inc. (headquartered in Corry, PA) in a previous PITA sponsored study. In the proposed study the new dampers will be placed in an existing large-scale test structure, consisting of a steel braced frame and moment resisting frame, and several real-time hybrid simulations performed. The experimental data that is to be acquired during the simulations is critical towards validating the performance of the damper, any improvements needed in the damper design and its manufacturing procedure, and the integration of the dampers into a performance-based design procedure for buildings subject to earthquake loading conditions.

The project builds upon results from prior studies on elastomeric dampers, where prior generations of dampers were constructed and mechanical properties of the dampers were obtained. These studies helped to establish real-time hybrid simulation methods for structural systems with passive dampers, which led to preliminary assessment of these dampers for structural vibration control under seismic loading.