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原文传递 Probabilistic Seismic Response and Capacity Models of Piles for Statewide Bridges in California

题名：	Probabilistic Seismic Response and Capacity Models of Piles for Statewide Bridges in California
正文语种：	eng
作者：	Xie, Yazhou;Zheng, Qiu;Roblee, Cliff;Yang, Chuang-Sheng Walter;Padgett, Jamie E.;DesRoches, Reginald
作者单位：	McGill Univ Dept Civil Engn Montreal PQ H3A 0C3 Canada;Georgia Inst Technol Sch Civil & Environm Engn Atlanta GA 30332 USA;Calif Dept Transportat Div Res Innovat & Syst Informat 5900 Folsom Blvd MS 5 Sacramento CA 95819 USA;Georgia Inst Technol Sch Civil & Environm Engn Atlanta GA 30332 USA;Rice Univ Dept Civil & Environm Engn Houston TX 77005 USA;Rice Univ Dept Civil & Environm Engn Houston TX 77005 USA
关键词：	Pile foundations;State pile inventory;Seismic response models;Capacity models;Regional seismic risk assessment;California bridges;Concrete and steel piles
摘要：	This study develops the probabilistic seismic response and capacity models for the broad collection of standard pile designs that are routinely incorporated into bridges in California. A review of the state bridge inventory indicates considerable variations in design details for different standard pile types used across multiple eras. For each pile type, fiber-section-based pile models attached with p-y soil springs are built to incorporate nonlinear behaviors of soil materials, a wide array of heterogeneous soil profiles, full-range damage states of piles, and realistic connection details between piles and footings (i.e., pile caps). Moreover, force-displacement responses of pile-soil systems under a large number of pushover analyses are regressed as response models consisting of five parameters [termed as response five parameter (R5P) models], which can capture all essential behaviors of laterally-loaded piles. Capacity damage states and limit state models are defined for different pile types by linking pile global responses to fiber-scale material behaviors at plastic hinge locations. Procedures are further provided to expand R5P models to pile foundation models at the regional scale, taking into account the pile group effect and capacities of pile cap backfills. R5P models for all distinct pile types are further summarized in an Excel workbook to facilitate their practical implementations. In general, this study provides a comprehensive and consistent set of response and capacity models to quantify the seismic damage potential of regional pile foundations, as well as to capture their dynamic interplays with other crucial bridge components, such as columns and abutment components. The proposed pile models are expected to significantly enhance the existing modeling capability toward improved seismic risk assessment of California's bridge infrastructure. (C) 2021 American Society of Civil Engineers.
出版年：	2021
期刊名称：	Journal of structural engineering
卷：	147
期：	9