Dr. P. Saha Professor, civil Engineering department has authored a paper was published in International Conference on Structural Stability and Dynamics Organized by department of Mechanical Engineering TEXAS A&M University USA at National Institute of Technology jaipur
Earthquake response of phase?II
benchmark cable-stayed bridge with variable friction pendulum Systems (VFPS) are investigated.
The performance of this isolator is compared with traditional friction Pendulum
system (FPS). The seismic response of the bridge is evaluated using the
hysteretic model of these sliding isolators. In phase-II benchmark problem, the ground
acceleration is applied in any arbitrary direction using both horizontal
components of the earthquakes with a specified incidence angle. Multi-support
excitations are also considered in this phase. A comparative performance study among
these two selected sliding isolators for seismic response of the bridge is
carried out. Varying the
important parameters of VFPS, evaluation criteria of the benchmark cable-stayed
bridge problem are evaluated and optimum values of the parameters are
determined. Significant reduction in base shear, base moment and other
responses are observed without large deck displacement by using the VFPS.
Comparing the evaluation criteria of the benchmark problem, it is observed that
the performance of VFPS is better than FPS.
Keywords: Benchmark cable-stayed bridge, FPS, VFPS, seismic
response, sliding base isolation