Documentation of Finite Element Analyses. Report 2. Anchored Wall Monolith, Bay Springs Lock.
Abstract
Bay Springs Lock and Dam, located in northeast Mississippi, is the northernmost of the system of locks and dams on the Tennessee-Tombigbee Waterway. The navigation lock will be formed by a combination of anchored chambered walls and gravity-type gate blocks, with a reinforced concrete floor strut. The 'anchored wall' monoliths differ from conventional gravity-type monoliths in that posttensioned tendons engaging rock account in part for the stability of the walls. The anchored wall, with its concrete-foundation-tendon interaction characteristics, poses a formidable challenge to analysis by classical methods, making it an ideal problem for solution by a computerized, numerical analysis technique. Due to the complex geometry of the structure, multiple materials, posttensioning of the tendons, and the attendant boundary conditions, the finite element method was selected as the only viable analysis technique for determining the state of stress in the anchored wall monolith and its surrounding foundation. The ANSYS FEM program was used, primarily to take advantage of its nonlinear boundary element which was used to approximate the interaction at material interfaces. Solutions for the various load cases were displayed graphically in numerous pressure, stress, and deflected shape diagrams. Results confirm the assumption of the rigid body stability analysis program used to size the tendons of the anchored wall monolith and indicate a safe design with regard to the established criteria. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1980
- Accession Number
- ADA096481
Entities
People
- P. Thomas Mcgee