Comparative study of different methods for superstructure-foundation interactions

dc.contributor.authorSharma, Prakriti
dc.contributor.supervisorSun, Min
dc.contributor.supervisorLin, Cheng
dc.date.accessioned2022-01-04T21:41:32Z
dc.date.copyright2021en_US
dc.date.issued2022-01-04
dc.degree.departmentDepartment of Civil Engineeringen_US
dc.degree.levelMaster of Applied Science M.A.Sc.en_US
dc.description.abstractBridge failures in the past decade due to structural deficiencies demonstrated the clear need for a review of the current bridge analysis approaches. This study focuses on pile-supported bridges under predominantly static loading. A critical review of the current analysis approaches was performed. It was concluded that in the absence of an onerous iteration process, the current approaches often produce inaccurate and, in many cases, unsafe results since the interactions between superstructure and foundation are not fully considered. To address the inherent limitations of the current approaches, a computer program [Soil Spring Module (SSM) 2.0] was developed as a part of the study. SSM 2.0 can be used in conjunction with a frame analysis program to capture nonlinear load transfer from foundation elements to soil in different directions simultaneously. STAAD.Pro was selected for demonstration in this study. Using SSM 2.0 and STAAD.Pro, this study proposes a new analysis approach using the Integrated Analysis Process (IAP). The same methodology can be applied in other frame analysis programs. Kansas Bridge 45 was selected as a case study. Using the IAP approach, a series of integrated analyses including all superstructure elements (e.g., deck, girders and piers) and all foundation elements (e.g., pile caps and piles) were performed on Kansas Bridge 45 for different soil types and properties. Different from the conventional approaches, the full interactions between superstructure and foundation were considered simultaneously in a single analysis using the IAP approach. The analysis results from the IAP approach and the conventional approaches were examined. The advantages of the IAP approach were identified. Comparing to the conventional approaches in current practice, the proposed IAP approach does not involve crude assumptions or intensive iterations. Using the IAP approach, design engineers can complete structural and foundation analysis of pile-supported bridges with good accuracy in a timely manner. The same methodology can potentially be applied to other structure types.en_US
dc.description.scholarlevelGraduateen_US
dc.identifier.urihttp://hdl.handle.net/1828/13654
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectPile foundationen_US
dc.subjectsuperstructure-foundation interactionen_US
dc.subjectbridgeen_US
dc.subjectsoil-structure interactionen_US
dc.subjectSTAAD.Proen_US
dc.subjectIntegrated bridge analysisen_US
dc.subjectsoft clayen_US
dc.subjectstiff clayen_US
dc.subjectsoil- pile-structure interactionen_US
dc.subjectsoil springsen_US
dc.subjectsuperstructure stiffnessen_US
dc.subjectDavisson and Robinsonen_US
dc.subjectsuperstructure responseen_US
dc.subjectfoundation responseen_US
dc.subjectp-yen_US
dc.subjectt-zen_US
dc.subjectq-zen_US
dc.titleComparative study of different methods for superstructure-foundation interactionsen_US
dc.typeThesisen_US

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