Integration of Experimental and Simulation Data in the Study of Reinforced Concrete Bridge Systems Including Soil-Foundation-Structure Interaction

摘要

The seismic response of reinforced concrete bridges must include consideration of the whole system including soil-foundation-structure interaction (SFSI). Simulation models validated against the results of experimental tests are required to provide an accurate prediction of the bridge system response. Performance-based engineering necessitates large-scale parameter studies of these simulation models to quantify the demand for varying levels of seismic hazard. The goal of this research is to characterize the SFSI effects for a range of hazard levels by using calibrated models from the experimental tests. Two projects administered by the Network for Earthquake Engineering Simulation (NEES) have facilitated the study of this system effect through the collaboration of researchers within the earthquake engineering community. Shaking table tests of both a two-span and a four-span bridge at 1/4-scale were conducted at the University of Nevada, Reno. Nonlinear dynamic analyses of three-dimensional finite element models performed using OpenSees were evaluated based on the experimental test results. For the two-span bridge, the simulation model matches well both the global and local response until the onset of failure. The highly nonlinear pounding at the abutments and complicated test protocol of the four-span bridge produces less agreement in the simulation results.