Investigation of Seismic Isolation for California High-Speed Rail Prototype Bridge in the Context of Probabilistic Performance-Based Optimum Seismic Design


Abstract eng:
Because of the emerging transportation needs, the California High-Speed Rail (CHSR) project has been launched after significant success of high-speed rail systems in different countries around the world. In seismic prone areas, such as California, the seismic risk imposed to high-speed rail bridges is of particular concern to stakeholders and structural engineers. Seismic isolation is a promising solution to enhance the seismic performance of high-speed rail bridges. However, its effectiveness and beneficial effects need to be evaluated considering a comprehensive model of a high-speed rail bridge system (including the structure, soil, rails and their corresponding interactions) and using a probabilistic performance-based performance assessment approach. In this paper, a detailed three-dimensional (3-D) nonlinear finite element (FE) model of a CHSR prototype bridge, including soil-foundation-structure interaction and rail-structure interaction, is developed in OpenSees. Based on deterministic and probabilistic performance assessment, the responses (including the bridge structural and rail responses) of the prototype bridge with and without seismic isolation are compared. With a proper selection of seismic risk metrics/features used to quantify the beneficial and/or detrimental effects of seismic isolation under earthquake excitation, a parametric probabilistic seismic demand hazard analysis is performed with respect to the isolator model parameters. A well-posed problem of probabilistic performance-based optimum seismic design of seismic isolators for the CHSR prototype bridge is proposed to illustrate the suitability of seismic isolation for CHSR bridges using a probabilistic performance-based optimum seismic design framework.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 4478.:
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