Investigation On Seismic Analysis And Design For Structures With Passive Supplemental Damping Systems Based On Performance Curves

Life safety can be basically guaranteed under the traditional seismic fortification criterion, while property loss is often more than the social and the owners could afford, Performance-Based Seismic Design(PBSD) which can make the designed structure’s damage controlled in the expected performance objective under possible earthquake, and performance objective can be made by the owners, the objective can be achieved by seismic design. Thus, not only the life safety can be guaranteed, but also the economic loss can be controlled to the minimum.Vibration control can dissipate most energy and reduce the seismic response of main structure, and make sure that the structure itself and persons, equipment, decoration in the structure are all in the condition of safety and normal use when damper devices are installed at the specific parts where story drifts of structure are large. The seismic control of viscous and viscoelastic damper tend to be mature technology, and contribute significantly to the application of Performance-Based Seismic Design. The research of this paper are as follow:(1) The paper simply relates the theory and classification of energy dissipation; analyzes the impacts of basic principle and construction of viscous dampers, mechanical models, and various parameters on energy dissipation capacity; discusses the basic principle and construction, type and property of viscous damper.(2) The performance-curve-based seismic design is presented refers to the performance-spectrum-based seismic design presented by Christopoulos and the code for seismic design of building(GB50011-2010). The process of plotting performance curve and design procedure of multi-story damping structure are described in detail in the paper. The PKPM software is used to design the main structure of six-story steel frame teaching building(so-called primary structure), the seismic design of the structure is conducted by modeling analysis using the Open Sees finite element software. The performance curve of structure can be used to determine stiffness ratio and damping ratio, and further determine the number of dampers at each story. The seismic performance of the structure with and without dampers are compared.(3) The 20 near-fault pulse-type ground motions and 20 far-field earthquake records are selected for conducting IDA(Incremental Dynamic Analysis, IDA) of single frame of the structure. The results show that the seismic performance of damping structure can be enhanced when installed with additional damping device, the predetermined performance objective can be achieved, prevention collapse property can be significantly ameliorated.In short, This article studied on Investigation on Seismic analysis and design for structures with passive supplemental damping systems based on performance curves, found that the seismic performance of damping structure can be enhanced when installed with additional damping device, the predetermined performance objective can be achieved, prevention collapse property can be significantly ameliorated, these results can provide theoretical basis and technical support for seismic analysis and design for steel structures with passive supplemental damping systems, and has important practical reference value and practical significance.