Dynamic Soil-Structure-Soil-Interaction Analysis of Structures in Dense Urban Environments

摘要: Urban centers are increasingly becoming the locus of enterprise, innovation, and population. This pull toward center cities has steadily elevated importance these areas. Growth necessarily spawned new construction. Consequently, modern buildings often constructed alongside legacy structures, deep basements existing shallow foundations, city blocks composed a variety building types result. The underlying soil, foundation, superstructure each can interact combine to yield unique seismic responses. Since seminal work researchers such as Luco Contesse (1973) Wong Trifunac (1975), have investigated effects soil-structure interaction (SSI). phenomenon refers between single building, its soil during event. However, trend urbanization continues, shortcoming this conventional SSI approach is that in reality, structure will almost certainly be located near other structures metropolitan areas.In line research, multiple, adjacent event, known structure-soil-structure (SSSI), investigated. topic does not yet command level attention given SSI. SSSI potential significantly detrimental or beneficial, depending on configuration dynamic properties their foundations dense urban environments. It important understand so earthquake engineers make informed decisions about design construction areas.As part larger, multi-university National Science Foundation (NSF)-supported Network for Earthquake Engineering Simulation Research (NEESR) project, series centrifuge experiments were performed at NEES-supported Center Geotechnical Modeling (CGM) University California, Davis. Each examined aspects through use nonlinear structural model situated different supported sand deposits. created suite small-scale physical "case histories" provided "data" insight could extended calibrated numerical simulations. results first three test (i.e., Test-1, Test-2, Test-3) utilized dissertation.Numerical analyses usually only high-profile projects. effort, expertise resources required calibrate perform detailed simulations prohibitive typical low- mid-rise structures. There need more accessible tool both geotechnical utilize gain insight. In FLAC finite difference program (Itasca, 2005) with fully effective stress constitutive…